ID CVE-2016-3960
Summary Integer overflow in the x86 shadow pagetable code in Xen allows local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping.
References
Vulnerable Configurations
  • Xen
    cpe:2.3:o:xen:xen
  • Fedora 24
    cpe:2.3:o:fedoraproject:fedora:24
  • Fedora Project Fedora 23
    cpe:2.3:o:fedoraproject:fedora:23
  • Fedora 22
    cpe:2.3:o:fedoraproject:fedora:22
  • cpe:2.3:o:oracle:vm_server:3.4
    cpe:2.3:o:oracle:vm_server:3.4
  • cpe:2.3:o:oracle:vm_server:3.3
    cpe:2.3:o:oracle:vm_server:3.3
  • cpe:2.3:o:oracle:vm_server:3.2
    cpe:2.3:o:oracle:vm_server:3.2
CVSS
Base: 7.2 (as of 09-09-2016 - 22:11)
Impact:
Exploitability:
CWE CWE-264
CAPEC
  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.
  • Manipulating Input to File System Calls
    An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Access
VectorComplexityAuthentication
LOCAL LOW NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
nessus via4
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2016-0089.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2016-0089 for details.
    last seen 2019-02-21
    modified 2018-07-24
    plugin id 92601
    published 2016-07-28
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92601
    title OracleVM 3.3 : xen (OVMSA-2016-0089)
  • NASL family FreeBSD Local Security Checks
    NASL id FREEBSD_PKG_D51CED72421211E6942DBC5FF45D0F28.NASL
    description The Xen Project reports : In the x86 shadow pagetable code, the guest frame number of a superpage mapping is stored in a 32-bit field. If a shadowed guest can cause a superpage mapping of a guest-physical address at or above 2^44 to be shadowed, the top bits of the address will be lost, causing an assertion failure or NULL dereference later on, in code that removes the shadow. A HVM guest using shadow pagetables can cause the host to crash. A PV guest using shadow pagetables (i.e. being migrated) with PV superpages enabled (which is not the default) can crash the host, or corrupt hypervisor memory, and so a privilege escalation cannot be ruled out.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 91934
    published 2016-07-05
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91934
    title FreeBSD : xen-kernel -- x86 shadow pagetables: address width overflow (d51ced72-4212-11e6-942d-bc5ff45d0f28)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2016-0081.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2016-0081 for details.
    last seen 2019-02-21
    modified 2018-07-24
    plugin id 91756
    published 2016-06-22
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91756
    title OracleVM 3.2 : xen (OVMSA-2016-0081)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-48E72B7BC5.NASL
    description x86 shadow pagetables: address width overflow [XSA-173, CVE-2016-3960] Qemu: net: buffer overflow in stellaris_enet emulator [CVE-2016-4001] Qemu: net: buffer overflow in MIPSnet emulator [CVE-2016-4002] qemu: Infinite loop vulnerability in usb_ehci using siTD process [CVE-2016-4037] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2016-10-18
    plugin id 90954
    published 2016-05-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90954
    title Fedora 24 : xen-4.6.1-6.fc24 (2016-48e72b7bc5)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-75063477CA.NASL
    description x86 shadow pagetables: address width overflow [XSA-173, CVE-2016-3960] Qemu: net: buffer overflow in stellaris_enet emulator [CVE-2016-4001] Qemu: net: buffer overflow in MIPSnet emulator [CVE-2016-4002] qemu: Infinite loop vulnerability in usb_ehci using siTD process [CVE-2016-4037] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2016-10-18
    plugin id 90814
    published 2016-05-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90814
    title Fedora 22 : xen-4.5.3-2.fc22 (2016-75063477ca)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-2100-1.NASL
    description This update for xen fixes the several issues. These security issues were fixed : - CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264). - CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188). - CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188). - CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164). - CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038). - CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130). - CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138). - CVE-2016-4020: The patch_instruction function did not initialize the imm32 variable, which allowed local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR) (bsc#975907). - CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list (bsc#976111). - CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716). - CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724). - CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225). - CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggered an out-of-bounds read (bsc#982224). - CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data routines (bsc#981276). - CVE-2016-4962: The libxl device-handling allowed local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore (bsc#979620). - CVE-2016-4963: The libxl device-handling allowed local guest OS users with access to the driver domain to cause a denial of service (management tool confusion) by manipulating information in the backend directories in xenstore (bsc#979670). - CVE-2016-5105: Stack information leakage while reading configuration (bsc#982024). - CVE-2016-5106: Out-of-bounds write while setting controller properties (bsc#982025). - CVE-2016-5107: Out-of-bounds read in megasas_lookup_frame() function (bsc#982026). - CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl function allowed local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call (bsc#982286). - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c might have allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via vectors related to reading from the information transfer buffer in non-DMA mode (bsc#982960). - CVE-2016-5337: The megasas_ctrl_get_info function allowed local guest OS administrators to obtain sensitive host memory information via vectors related to reading device control information (bsc#983973). - CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions allowed local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the host via vectors related to the information transfer buffer (bsc#983984). - CVE-2016-6258: Potential privilege escalation in PV guests (XSA-182) (bsc#988675). - bsc#978295: x86 software guest page walk PS bit handling flaw (XSA-176) - CVE-2016-5403: virtio: unbounded memory allocation on host via guest leading to DoS (XSA-184) (bsc#990923) - CVE-2016-6351: scsi: esp: OOB write access in esp_do_dma (bsc#990843) The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 93298
    published 2016-09-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93298
    title SUSE SLES11 Security Update : xen (SUSE-SU-2016:2100-1) (Bunker Buster)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-2093-1.NASL
    description This update for xen to version 4.5.3 fixes the several issues. These security issues were fixed : - CVE-2016-6258: Potential privilege escalation in PV guests (XSA-182) (bsc#988675). - CVE-2016-6259: Missing SMAP whitelisting in 32-bit exception / event delivery (XSA-183) (bsc#988676). - CVE-2016-5337: The megasas_ctrl_get_info function allowed local guest OS administrators to obtain sensitive host memory information via vectors related to reading device control information (bsc#983973). - CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions allowed local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the host via vectors related to the information transfer buffer (bsc#983984). - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c might have allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via vectors related to reading from the information transfer buffer in non-DMA mode (bsc#982960). - CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225). - CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggered an out-of-bounds read (bsc#982224). - CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl function allowed local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call (bsc#982286). - CVE-2016-5105: Stack information leakage while reading configuration (bsc#982024). - CVE-2016-5106: Out-of-bounds write while setting controller properties (bsc#982025). - CVE-2016-5107: Out-of-bounds read in megasas_lookup_frame() function (bsc#982026). - CVE-2016-4963: The libxl device-handling allowed local guest OS users with access to the driver domain to cause a denial of service (management tool confusion) by manipulating information in the backend directories in xenstore (bsc#979670). - CVE-2016-4962: The libxl device-handling allowed local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore (bsc#979620). - CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data routines (bsc#981276). - CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264). - CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724). - CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716). - CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164). - CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038). - CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188). - CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188). - CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list (bsc#976111). - CVE-2016-4020: The patch_instruction function did not initialize the imm32 variable, which allowed local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR) (bsc#975907). - CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130). - CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138). - bsc#978295: x86 software guest page walk PS bit handling flaw (XSA-176) - CVE-2016-5403: virtio: unbounded memory allocation on host via guest leading to DoS (XSA-184) (bsc#990923) - CVE-2016-6351: scsi: esp: OOB write access in esp_do_dma (bsc#990843) The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 93296
    published 2016-09-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93296
    title SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:2093-1) (Bunker Buster)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DLA-571.NASL
    description Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems : CVE-2014-3672 (XSA-180) Andrew Sorensen discovered that a HVM domain can exhaust the hosts disk space by filling up the log file. CVE-2016-3158, CVE-2016-3159 (XSA-172) Jan Beulich from SUSE discovered that Xen does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors. A malicious domain can take advantage of this flaw to obtain address space usage and timing information, about another domain, at a fairly low rate. CVE-2016-3710 (XSA-179) Wei Xiao and Qinghao Tang of 360.cn Inc discovered an out-of-bounds read and write flaw in the QEMU VGA module. A privileged guest user could use this flaw to execute arbitrary code on the host with the privileges of the hosting QEMU process. CVE-2016-3712 (XSA-179) Zuozhi Fzz of Alibaba Inc discovered potential integer overflow or out-of-bounds read access issues in the QEMU VGA module. A privileged guest user could use this flaw to mount a denial of service (QEMU process crash). CVE-2016-3960 (XSA-173) Ling Liu and Yihan Lian of the Cloud Security Team, Qihoo 360 discovered an integer overflow in the x86 shadow pagetable code. A HVM guest using shadow pagetables can cause the host to crash. A PV guest using shadow pagetables (i.e. being migrated) with PV superpages enabled (which is not the default) can crash the host, or corrupt hypervisor memory, potentially leading to privilege escalation. CVE-2016-4480 (XSA-176) Jan Beulich discovered that incorrect page table handling could result in privilege escalation inside a Xen guest instance. CVE-2016-6258 (XSA-182) Jérémie Boutoille discovered that incorrect pagetable handling in PV instances could result in guest to host privilege escalation. Additionally this Xen Security Advisory without a CVE was fixed : XSA-166 Konrad Rzeszutek Wilk and Jan Beulich discovered that ioreq handling is possibly susceptible to a multiple read issue. For Debian 7 'Wheezy', these problems have been fixed in version 4.1.6.lts1-1. We recommend that you upgrade your xen packages. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-07-06
    plugin id 92635
    published 2016-08-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92635
    title Debian DLA-571-1 : xen security update (Bunker Buster)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2016-0090.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : - x86/HVM: correct CPUID leaf 80000008 handling - 6c733e54 xsa173_01_0001-x86-HVM-correct-CPUID-leaf-80000008-handl ing.patch was based on upstream commit: ef437690af8b75e6758dce77af75a22b63982883 x86/HVM: correct CPUID leaf 80000008 handling It should have been based on upstream commit: 6c733e549889a9b8c4e03140348b8e00241d4ce9 x86/HVM: correct CPUID leaf 80000008 handling The changes in this patch are the differences between those two patches. - x86/pv: Remove unsafe bits from the mod_l?_entry fastpath All changes in writeability and cacheability must go through full re-validation. Rework the logic as a whitelist, to make it clearer to follow. This is XSA-182 Upstream commit 798c1498f764bfaa7b0b955bab40b01b0610d372 Conflicts: xen/include/asm-x86/page.h - x86/mm: fully honor PS bits in guest page table walks In L4 entries it is currently unconditionally reserved (and hence should, when set, always result in a reserved bit page fault), and is reserved on hardware not supporting 1Gb pages (and hence should, when set, similarly cause a reserved bit page fault on such hardware). This is CVE-2016-4480 / XSA-176. (CVE-2016-4480) - x86/mm: Handle 1GiB superpages in the pagetable walker. This allows HAP guests to use 1GiB superpages. Shadow and PV guests still can't use them without more support in shadow/* and mm.c. Conflicts: xen/arch/x86/hvm/hvm.c xen/arch/x86/mm/guest_walk.c Backported from upstream commit 96b740e209d0bea4c16d93211ceb139fc98d10c2 (CVE-2016-4480) - main loop: Big hammer to fix logfile disk DoS in Xen setups Each time round the main loop, we now fstat stderr. If it is too big, we dup2 /dev/null onto it. This is not a very pretty patch but it is very simple, easy to see that it's correct, and has a low risk of collateral damage. The limit is 1Mby by default but can be adjusted by setting a new environment variable. This fixes CVE-2014-3672. (CVE-2014-3672) - x86: make hvm_cpuid tolerate NULL pointers Now that other HVM code started making more extensive use of hvm_cpuid, let's not force every caller to declare dummy variables for output not cared about. xen/arch/x86/hvm/svm/svm.c and xen/arch/x86/hvm/vmx/vvmx.c part are removed as no source matched. Upstream commit 11b85dbd0ab068bad3beadda3aee2298205a3c01 - x86: limit GFNs to 32 bits for shadowed superpages. Superpage shadows store the shadowed GFN in the backpointer field, which for non-BIGMEM builds is 32 bits wide. Shadowing a superpage mapping of a guest-physical address above 2^44 would lead to the GFN being truncated there, and a crash when we come to remove the shadow from the hash table. Track the valid width of a GFN for each guest, including reporting it through CPUID, and enforce it in the shadow pagetables. Set the maximum witth to 32 for guests where this truncation could occur. This is XSA-173. Conflicts: xen/arch/x86/cpu/common.c arch/x86/mm/guest_walk.c Upstream commit 95dd1b6e87b61222fc856724a5d828c9bdc30c80 (CVE-2016-3960) - x86/HVM: correct CPUID leaf 80000008 handling CPUID[80000008].EAX[23:16] have been given the meaning of the guest physical address restriction (in case it needs to be smaller than the host's), hence we need to mirror that into vCPUID[80000008].EAX[7:0]. Enforce a lower limit at the same time, as well as a fixed value for the virtual address bits, and zero for the guest physical address ones. In order for the vMTRR code to see these overrides we need to make it call hvm_cpuid instead of domain_cpuid, which in turn requires special casing (and relaxing) the controlling domain. This additionally should hide an ordering problem in the tools: Both xend and xl appear to be restoring a guest from its image before setting up the CPUID policy in the hypervisor, resulting in domain_cpuid returning all zeros and hence the check in mtrr_var_range_msr_set failing if the guest previously had more than the minimum 36 physical address bits. Conflicts: xen/arch/x86/hvm/mtrr.c Upstream commit ef437690af8b75e6758dce77af75a22b63982883 (CVE-2016-3960)
    last seen 2019-02-21
    modified 2018-07-24
    plugin id 92602
    published 2016-07-28
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92602
    title OracleVM 3.2 : xen (OVMSA-2016-0090)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-2533-1.NASL
    description This update for xen fixes several issues. These security issues were fixed : - CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264). - CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188). - CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188). - CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164) - CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038). - CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130). - CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138). - CVE-2016-4020: The patch_instruction function did not initialize the imm32 variable, which allowed local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR) (bsc#975907) - CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list (bsc#976111) - CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716) - CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724) - CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225) - CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggered an out-of-bounds read (bsc#982224) - CVE-2016-4480: The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen did not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might have allowed local guest OS users to gain privileges via a crafted mapping of memory (bsc#978295). - CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data routines (bsc#981276) - CVE-2016-4962: The libxl device-handling allowed local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore (bsc#979620) - CVE-2016-4963: The libxl device-handling allowed local guest OS users with access to the driver domain to cause a denial of service (management tool confusion) by manipulating information in the backend directories in xenstore (bsc#979670) - CVE-2016-5105: Stack information leakage while reading configuration (bsc#982024) - CVE-2016-5106: Out-of-bounds write while setting controller properties (bsc#982025) - CVE-2016-5107: Out-of-bounds read in megasas_lookup_frame() function (bsc#982026) - CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl function allowed local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call (bsc#982286) - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c might have allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via vectors related to reading from the information transfer buffer in non-DMA mode (bsc#982960) - CVE-2016-5337: The megasas_ctrl_get_info function allowed local guest OS administrators to obtain sensitive host memory information via vectors related to reading device control information (bsc#983973) - CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions allowed local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the host via vectors related to the information transfer buffer (bsc#983984) - CVE-2016-5403: virtio: unbounded memory allocation on host via guest leading to DoS (XSA-184) (bsc#990923) - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries (bsc#988675) - CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c, when built with ESP/NCR53C9x controller emulation support, allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or execute arbitrary code on the host via vectors involving DMA read into ESP command buffer (bsc#990843). - CVE-2016-6833: A use-after-free issue in the VMWARE VMXNET3 NIC device support allowed privileged user inside guest to crash the Qemu instance resulting in DoS (bsc#994775). - CVE-2016-6834: A infinite loop during packet fragmentation in the VMWARE VMXNET3 NIC device support allowed privileged user inside guest to crash the Qemu instance resulting in DoS (bsc#994421). - CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC device support, causing an OOB read access (bsc#994625). - CVE-2016-6836: VMWARE VMXNET3 NIC device allowed privileged user inside the guest to leak information. It occured while processing transmit(tx) queue, when it reaches the end of packet (bsc#994761). - CVE-2016-6888: A integer overflow int the VMWARE VMXNET3 NIC device support, during the initialisation of new packets in the device, could have allowed a privileged user inside guest to crash the Qemu instance resulting in DoS (bsc#994772). - CVE-2016-7092: The get_page_from_l3e function in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges via vectors related to L3 recursive pagetables (bsc#995785) - CVE-2016-7093: Xen allowed local HVM guest OS administrators to overwrite hypervisor memory and consequently gain host OS privileges by leveraging mishandling of instruction pointer truncation during emulation (bsc#995789) - CVE-2016-7094: Buffer overflow in Xen allowed local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update (bsc#995792) - CVE-2016-7154: Use-after-free vulnerability in the FIFO event channel code in Xen allowed local guest OS administrators to cause a denial of service (host crash) and possibly execute arbitrary code or obtain sensitive information via an invalid guest frame number (bsc#997731). The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 94269
    published 2016-10-26
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=94269
    title SUSE SLES12 Security Update : xen (SUSE-SU-2016:2533-1) (Bunker Buster)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-2528-1.NASL
    description This update for xen fixes several issues. These security issues were fixed : - CVE-2016-7094: Buffer overflow in Xen allowed local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update (bsc#995792) - CVE-2016-7092: The get_page_from_l3e function in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges via vectors related to L3 recursive pagetables (bsc#995785) - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries (bsc#988675) - CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions allowed local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the host via vectors related to the information transfer buffer (bsc#983984) - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c might have allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via vectors related to reading from the information transfer buffer in non-DMA mode (bsc#982960) - CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264) - CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724) - CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716) - CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164) - CVE-2016-4480: The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen did not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might have allowed local guest OS users to gain privileges via a crafted mapping of memory (bsc#978295) - CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038) - CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188) - CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130) - CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 94267
    published 2016-10-26
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=94267
    title SUSE SLES11 Security Update : xen (SUSE-SU-2016:2528-1) (Bunker Buster)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-35D7B09908.NASL
    description x86 shadow pagetables: address width overflow [XSA-173, CVE-2016-3960] Qemu: net: buffer overflow in stellaris_enet emulator [CVE-2016-4001] Qemu: net: buffer overflow in MIPSnet emulator [CVE-2016-4002] qemu: Infinite loop vulnerability in usb_ehci using siTD process [CVE-2016-4037] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2016-10-18
    plugin id 90811
    published 2016-05-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90811
    title Fedora 23 : xen-4.5.3-2.fc23 (2016-35d7b09908)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-3554.NASL
    description Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems : - CVE-2016-3158, CVE-2016-3159 (XSA-172) Jan Beulich from SUSE discovered that Xen does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors. A malicious domain can take advantage of this flaw to obtain address space usage and timing information, about another domain, at a fairly low rate. - CVE-2016-3960 (XSA-173) Ling Liu and Yihan Lian of the Cloud Security Team, Qihoo 360 discovered an integer overflow in the x86 shadow pagetable code. A HVM guest using shadow pagetables can cause the host to crash. A PV guest using shadow pagetables (i.e. being migrated) with PV superpages enabled (which is not the default) can crash the host, or corrupt hypervisor memory, potentially leading to privilege escalation.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 90638
    published 2016-04-22
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90638
    title Debian DSA-3554-1 : xen - security update
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-2725-1.NASL
    description This update for xen fixes several issues. These security issues were fixed : - CVE-2016-7094: Buffer overflow in Xen allowed local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update (bsc#995792) - CVE-2016-7092: The get_page_from_l3e function in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges via vectors related to L3 recursive pagetables (bsc#995785) - CVE-2016-5403: Unbounded memory allocation allowed a guest administrator to cause a denial of service of the host (bsc#990923) - CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c, when built with ESP/NCR53C9x controller emulation support, allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or execute arbitrary code on the host via vectors involving DMA read into ESP command buffer (bsc#990843) - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries (bsc#988675) - CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions allowed local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the host via vectors related to the information transfer buffer (bsc#983984) - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c might have allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via vectors related to reading from the information transfer buffer in non-DMA mode (bsc#982960) - CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225) - CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggered an out-of-bounds read (bsc#982224) - CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264) - CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724) - CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716) - CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164) - CVE-2016-4480: The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen did not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might have allowed local guest OS users to gain privileges via a crafted mapping of memory (bsc#978295) - CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038) - CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188) - CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130) - CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138) The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 94608
    published 2016-11-07
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=94608
    title SUSE SLES11 Security Update : xen (SUSE-SU-2016:2725-1) (Bunker Buster)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2016-0088.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : - BUILDINFO: commit=aff08b43b1a504aa14a0fce65302ccf515b69fdf - Remove unsafe bits from the mod_l?_entry fastpath (Andrew Cooper) (CVE-2016-6258) - x86/mm: fully honor PS bits in guest page table walks (Jan Beulich) (CVE-2016-4480) (CVE-2016-4480) - libxl: Document ~/serial/ correctly (Ian Jackson) (CVE-2016-4962) - libxl: Cleanup: Have libxl__alloc_vdev use /libxl (Ian Jackson) (CVE-2016-4962) - libxl: Do not trust frontend for nic in getinfo (Ian Jackson) (CVE-2016-4962) - libxl: Do not trust frontend for nic in libxl_devid_to_device_nic (Ian Jackson) (CVE-2016-4962) - libxl: Do not trust frontend for vtpm in getinfo (Ian Jackson) (CVE-2016-4962) - libxl: Do not trust frontend for vtpm list (Ian Jackson) (CVE-2016-4962) - libxl: Do not trust frontend for disk in getinfo (Ian Jackson) (CVE-2016-4962) - libxl: Do not trust frontend for disk eject event (Ian Jackson) (CVE-2016-4962) - libxl: Do not trust frontend in libxl__device_nextid (Ian Jackson) (CVE-2016-4962) - libxl: Do not trust frontend in libxl__devices_destroy (Ian Jackson) (CVE-2016-4962) - libxl: Provide libxl__backendpath_parse_domid (Ian Jackson) (CVE-2016-4962) - libxl: Record backend/frontend paths in /libxl/$DOMID (Ian Jackson) (CVE-2016-4962) - x86: limit GFNs to 32 bits for shadowed superpages. (Tim Deegan) (CVE-2016-3960) - x86: fix information leak on AMD CPUs (Jan Beulich) (CVE-2016-3158) (CVE-2016-3159) (CVE-2016-3158) (CVE-2016-3159) (CVE-2016-3158) (CVE-2016-3159) - x86: enforce consistent cachability of MMIO mappings (Jan Beulich) (CVE-2016-2270) (CVE-2016-2270)
    last seen 2019-02-21
    modified 2018-11-19
    plugin id 92600
    published 2016-07-28
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92600
    title OracleVM 3.4 : xen (OVMSA-2016-0088) (Bunker Buster)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-1170.NASL
    description This update for xen fixes the following issues : These security issues were fixed : - CVE-2016-7092: The get_page_from_l3e function in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges via vectors related to L3 recursive pagetables (bsc#995785) - CVE-2016-7093: Xen allowed local HVM guest OS administrators to overwrite hypervisor memory and consequently gain host OS privileges by leveraging mishandling of instruction pointer truncation during emulation (bsc#995789) - CVE-2016-7094: Buffer overflow in Xen allowed local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update (bsc#995792) - CVE-2016-6836: VMWARE VMXNET3 NIC device support was leaging information leakage. A privileged user inside guest could have used this to leak host memory bytes to a guest (boo#994761) - CVE-2016-6888: Integer overflow in packet initialisation in VMXNET3 device driver. A privileged user inside guest could have used this flaw to crash the Qemu instance resulting in DoS (bsc#994772) - CVE-2016-6833: Use-after-free issue in the VMWARE VMXNET3 NIC device support. A privileged user inside guest could have used this issue to crash the Qemu instance resulting in DoS (boo#994775) - CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC device support, causing an OOB read access (bsc#994625) - CVE-2016-6834: A infinite loop during packet fragmentation in the VMWARE VMXNET3 NIC device support allowed privileged user inside guest to crash the Qemu instance resulting in DoS (bsc#994421) - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries (bsc#988675) - CVE-2016-6259: Xen did not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allowed local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check (bsc#988676) - CVE-2016-5403: The virtqueue_pop function in hw/virtio/virtio.c in QEMU allowed local guest OS administrators to cause a denial of service (memory consumption and QEMU process crash) by submitting requests without waiting for completion (boo#990923) - CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c, when built with ESP/NCR53C9x controller emulation support, allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or execute arbitrary code on the host via vectors involving DMA read into ESP command buffer (bsc#990843) - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries (bsc#988675) - CVE-2016-6259: Xen did not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allowed local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check (bsc#988676) - CVE-2016-5337: The megasas_ctrl_get_info function in hw/scsi/megasas.c in QEMU allowed local guest OS administrators to obtain sensitive host memory information via vectors related to reading device control information (bsc#983973) - CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions in hw/scsi/esp.c in QEMU allowed local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the QEMU host via vectors related to the information transfer buffer (bsc#983984) - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c in QEMU allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via vectors related to reading from the information transfer buffer in non-DMA mode (bsc#982960) - CVE-2016-4453: The vmsvga_fifo_run function in hw/display/vmware_vga.c in QEMU allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225) - CVE-2016-4454: The vmsvga_fifo_read_raw function in hw/display/vmware_vga.c in QEMU allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggers an out-of-bounds read (bsc#982224) - CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl function in block/iscsi.c in QEMU allowed local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call (bsc#982286) - CVE-2016-5105: The megasas_dcmd_cfg_read function in hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, used an uninitialized variable, which allowed local guest administrators to read host memory via vectors involving a MegaRAID Firmware Interface (MFI) command (bsc#982024) - CVE-2016-5106: The megasas_dcmd_set_properties function in hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, allowed local guest administrators to cause a denial of service (out-of-bounds write access) via vectors involving a MegaRAID Firmware Interface (MFI) command (bsc#982025) - CVE-2016-5107: The megasas_lookup_frame function in QEMU, when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, allowed local guest OS administrators to cause a denial of service (out-of-bounds read and crash) via unspecified vectors (bsc#982026) - CVE-2016-4963: The libxl device-handling allowed local guest OS users with access to the driver domain to cause a denial of service (management tool confusion) by manipulating information in the backend directories in xenstore (bsc#979670) - CVE-2016-4962: The libxl device-handling allowed local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore (bsc#979620) - CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data routines (bsc#981276) - CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164) - CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264) - CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724) - CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716) - CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038) - CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188) - CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188) - CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list (bsc#976111) - CVE-2016-4020: The patch_instruction function did not initialize the imm32 variable, which allowed local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR) (bsc#975907) - CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130) - CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138) - CVE-2016-4480: The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen did not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might have allowed local guest OS users to gain privileges via a crafted mapping of memory (bsc#978295) These non-security issues were fixed : - boo#991934: xen hypervisor crash in csched_acct - boo#992224: During boot of Xen Hypervisor, Failed to get contiguous memory for DMA from Xen - boo#955104: Virsh reports error 'one or more references were leaked after disconnect from hypervisor' when 'virsh save' failed due to 'no response from client after 6 keepalive messages' - boo#959552: Migration of HVM guest leads into libvirt segmentation fault - boo#993665: Migration of xen guests finishes in: One or more references were leaked after disconnect from the hypervisor - boo#959330: Guest migrations using virsh results in error 'Internal error: received hangup / error event on socket' - boo#990500: VM virsh migration fails with keepalive error: ':virKeepAliveTimerInternal:143 : No response from client' - boo#953518: Unplug also SCSI disks in qemu-xen-traditional for upstream unplug protocol - boo#953518: xen_platform: unplug also SCSI disks in qemu-xen - boo#971949: Support (by ignoring) xl migrate --live. xl migrations are always live - boo#970135: New virtualization project clock test randomly fails on Xen - boo#990970: Add PMU support for Intel E7-8867 v4 (fam=6, model=79) - boo#985503: vif-route broken - boo#961100: Migrate a fv guest from sles12 to sles12sp1 fails remove patch because it can not fix the bug - boo#978413: PV guest upgrade from sles11sp4 to sles12sp2 alpha3 failed on sles11sp4 xen host. - boo#986586: Out of memory (oom) during boot on 'modprobe xenblk' (non xen kernel) init.50-hvm-xen_conf - boo#900418: Dump cannot be performed on SLES12 XEN - boo#953339, boo#953362, boo#953518, boo#984981: Implement SUSE specific unplug protocol for emulated PCI devices in PVonHVM guests to qemu-xen-upstream - boo#954872: script block-dmmd not working as expected - libxl: error: libxl_dm.c (Additional fixes) block-dmmd - boo#982695: xen-4.5.2 qemu fails to boot HVM guest from xvda - boo#958848: HVM guest crash at /usr/src/packages/BUILD/ xen-4.4.2-testing/obj/default/balloon/balloon.c:407 - boo#949889: Fail to install 32-bit paravirt VM under SLES12SP1Beta3 XEN - boo#954872: script block-dmmd not working as expected - libxl: error: libxl_dm.c (another modification) block-dmmd - boo#961600: Poor performance when Xen HVM domU configured with max memory greater than current memory - boo#963161: Windows VM getting stuck during load while a VF is assigned to it after upgrading to latest maintenance updates - boo#976058: Xen error running simple HVM guest (Post Alpha 2 xen+qemu) - boo#961100: Migrate a fv guest from sles12 to sles12sp1 on xen fails for 'Domain is not running on destination host'. qemu-ignore-kvm-tpr-opt-on-migration.patch - boo#973631: AWS EC2 kdump issue - boo#964427: Discarding device blocks: failed - Input/output error
    last seen 2019-02-21
    modified 2016-10-25
    plugin id 94000
    published 2016-10-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=94000
    title openSUSE Security Update : xen (openSUSE-2016-1170) (Bunker Buster)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-1169.NASL
    description This update for xen fixes the following issues : These security issues were fixed : - CVE-2016-7092: The get_page_from_l3e function in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges via vectors related to L3 recursive pagetables (bsc#995785) - CVE-2016-7093: Xen allowed local HVM guest OS administrators to overwrite hypervisor memory and consequently gain host OS privileges by leveraging mishandling of instruction pointer truncation during emulation (bsc#995789) - CVE-2016-7094: Buffer overflow in Xen allowed local x86 HVM guest OS administrators on guests running with shadow paging to cause a denial of service via a pagetable update (bsc#995792) - CVE-2016-7154: Use-after-free vulnerability in the FIFO event channel code in Xen allowed local guest OS administrators to cause a denial of service (host crash) and possibly execute arbitrary code or obtain sensitive information via an invalid guest frame number (bsc#997731) - CVE-2016-6836: VMWARE VMXNET3 NIC device support was leaging information leakage. A privileged user inside guest could have used this to leak host memory bytes to a guest (boo#994761) - CVE-2016-6888: Integer overflow in packet initialisation in VMXNET3 device driver. A privileged user inside guest could have used this flaw to crash the Qemu instance resulting in DoS (bsc#994772) - CVE-2016-6833: Use-after-free issue in the VMWARE VMXNET3 NIC device support. A privileged user inside guest could have used this issue to crash the Qemu instance resulting in DoS (boo#994775) - CVE-2016-6835: Buffer overflow in the VMWARE VMXNET3 NIC device support, causing an OOB read access (bsc#994625) - CVE-2016-6834: A infinite loop during packet fragmentation in the VMWARE VMXNET3 NIC device support allowed privileged user inside guest to crash the Qemu instance resulting in DoS (bsc#994421) - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries (bsc#988675) - CVE-2016-5403: The virtqueue_pop function in hw/virtio/virtio.c in QEMU allowed local guest OS administrators to cause a denial of service (memory consumption and QEMU process crash) by submitting requests without waiting for completion (boo#990923) - CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c, when built with ESP/NCR53C9x controller emulation support, allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or execute arbitrary code on the host via vectors involving DMA read into ESP command buffer (bsc#990843) - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries (bsc#988675) - CVE-2016-5337: The megasas_ctrl_get_info function in hw/scsi/megasas.c in QEMU allowed local guest OS administrators to obtain sensitive host memory information via vectors related to reading device control information (bsc#983973) - CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions in hw/scsi/esp.c in QEMU allowed local guest OS administrators to cause a denial of service (QEMU process crash) or execute arbitrary code on the QEMU host via vectors related to the information transfer buffer (bsc#983984) - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c in QEMU allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via vectors related to reading from the information transfer buffer in non-DMA mode (bsc#982960) - CVE-2016-4453: The vmsvga_fifo_run function in hw/display/vmware_vga.c in QEMU allowed local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via a VGA command (bsc#982225) - CVE-2016-4454: The vmsvga_fifo_read_raw function in hw/display/vmware_vga.c in QEMU allowed local guest OS administrators to obtain sensitive host memory information or cause a denial of service (QEMU process crash) by changing FIFO registers and issuing a VGA command, which triggers an out-of-bounds read (bsc#982224) - CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl function in block/iscsi.c in QEMU allowed local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call (bsc#982286) - CVE-2016-5105: The megasas_dcmd_cfg_read function in hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, used an uninitialized variable, which allowed local guest administrators to read host memory via vectors involving a MegaRAID Firmware Interface (MFI) command (bsc#982024) - CVE-2016-5106: The megasas_dcmd_set_properties function in hw/scsi/megasas.c in QEMU, when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, allowed local guest administrators to cause a denial of service (out-of-bounds write access) via vectors involving a MegaRAID Firmware Interface (MFI) command (bsc#982025) - CVE-2016-5107: The megasas_lookup_frame function in QEMU, when built with MegaRAID SAS 8708EM2 Host Bus Adapter emulation support, allowed local guest OS administrators to cause a denial of service (out-of-bounds read and crash) via unspecified vectors (bsc#982026) - CVE-2016-4963: The libxl device-handling allowed local guest OS users with access to the driver domain to cause a denial of service (management tool confusion) by manipulating information in the backend directories in xenstore (bsc#979670) - CVE-2016-4962: The libxl device-handling allowed local OS guest administrators to cause a denial of service (resource consumption or management facility confusion) or gain host OS privileges by manipulating information in guest controlled areas of xenstore (bsc#979620) - CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data routines (bsc#981276) - CVE-2014-3672: The qemu implementation in libvirt Xen allowed local guest OS users to cause a denial of service (host disk consumption) by writing to stdout or stderr (bsc#981264) - CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller (FSC) support did not properly check DMA length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) via unspecified vectors, involving an SCSI command (bsc#980724) - CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI Controller (FSC) support did not properly check command buffer length, which allowed local guest OS administrators to cause a denial of service (out-of-bounds write and QEMU process crash) or potentially execute arbitrary code on the host via unspecified vectors (bsc#980716) - CVE-2016-3710: The VGA module improperly performed bounds checking on banked access to video memory, which allowed local guest OS administrators to execute arbitrary code on the host by changing access modes after setting the bank register, aka the 'Dark Portal' issue (bsc#978164) - CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed local guest OS users to cause a denial of service (host crash) or possibly gain privileges by shadowing a superpage mapping (bsc#974038) - CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c allowed local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) via a circular split isochronous transfer descriptor (siTD) list (bsc#976111) - CVE-2016-4020: The patch_instruction function did not initialize the imm32 variable, which allowed local guest OS administrators to obtain sensitive information from host stack memory by accessing the Task Priority Register (TPR) (bsc#975907) - CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function, when the Stellaris ethernet controller is configured to accept large packets, allowed remote attackers to cause a denial of service (QEMU crash) via a large packet (bsc#975130) - CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the guest NIC is configured to accept large packets, allowed remote attackers to cause a denial of service (memory corruption and QEMU crash) or possibly execute arbitrary code via a packet larger than 1514 bytes (bsc#975138) - CVE-2016-3158: The xrstor function did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188) - CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allowed local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits (bsc#973188) - CVE-2016-4480: The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen did not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might have allowed local guest OS users to gain privileges via a crafted mapping of memory (bsc#978295) These non-security issues were fixed : - boo#991934: xen hypervisor crash in csched_acct - boo#992224: [HPS Bug] During boot of Xen Hypervisor, Failed to get contiguous memory for DMA from Xen - boo#970135: new virtualization project clock test randomly fails on Xen - boo#971949 xl: Support (by ignoring) xl migrate --live. xl migrations are always live - boo#990970: Add PMU support for Intel E7-8867 v4 (fam=6, model=79) - boo#985503: vif-route broken - boo#978413: PV guest upgrade from sles11sp4 to sles12sp2 alpha3 failed on sles11sp4 xen host - boo#986586: out of memory (oom) during boot on 'modprobe xenblk' (non xen kernel) - boo#953339, boo#953362, boo#953518, boo#984981) boo#953339, boo#953362, boo#953518, boo#984981: Implement SUSE specific unplug protocol for emulated PCI devices in PVonHVM guests to qemu-xen-upstream - boo#958848: HVM guest crash at /usr/src/packages/BUILD/ xen-4.4.2-testing/obj/default/balloon/balloon.c:407 - boo#982695: xen-4.5.2 qemu fails to boot HVM guest from xvda - boo#954872: script block-dmmd not working as expected - boo#961600: L3: poor performance when Xen HVM domU configured with max memory greater than current memory - boo#979035: restore xm migrate fixes for boo#955399/ boo#955399 - boo#963161: Windows VM getting stuck during load while a VF is assigned to it after upgrading to latest maintenance updates boo#963161 - boo#976058: Xen error running simple HVM guest (Post Alpha 2 xen+qemu) - boo#973631: AWS EC2 kdump issue - boo#961100: Migrate a fv guest from sles12 to sles12sp1 on xen fails for 'Domain is not running on destination host'. - boo#964427: Discarding device blocks: failed - Input/output error
    last seen 2019-02-21
    modified 2016-10-25
    plugin id 93999
    published 2016-10-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93999
    title openSUSE Security Update : xen (openSUSE-2016-1169) (Bunker Buster)
refmap via4
bid 86318
confirm
debian DSA-3554
fedora
  • FEDORA-2016-35d7b09908
  • FEDORA-2016-48e72b7bc5
  • FEDORA-2016-75063477ca
sectrack 1035587
Last major update 02-12-2016 - 22:27
Published 19-04-2016 - 10:59
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