ID CVE-2016-6258
Summary The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries.
References
Vulnerable Configurations
  • Xen 4.7.0
    cpe:2.3:o:xen:xen:4.7.0
  • Xen 4.6.3
    cpe:2.3:o:xen:xen:4.6.3
  • Xen Xen 4.6.1
    cpe:2.3:o:xen:xen:4.6.1
  • Xen 3.4.0
    cpe:2.3:o:xen:xen:3.4.0
  • Xen 3.4.2
    cpe:2.3:o:xen:xen:3.4.2
  • Xen 3.4.3
    cpe:2.3:o:xen:xen:3.4.3
  • Xen 3.4.4
    cpe:2.3:o:xen:xen:3.4.4
  • Xen 4.0.0
    cpe:2.3:o:xen:xen:4.0.0
  • Xen 4.1.3
    cpe:2.3:o:xen:xen:4.1.3
  • Xen 4.1.4
    cpe:2.3:o:xen:xen:4.1.4
  • Xen Xen 4.3.0
    cpe:2.3:o:xen:xen:4.3.0
  • Xen Xen 4.6.0
    cpe:2.3:o:xen:xen:4.6.0
  • Xen 4.1.5
    cpe:2.3:o:xen:xen:4.1.5
  • Xen Xen 4.4.1
    cpe:2.3:o:xen:xen:4.4.1
  • Xen 4.2.1
    cpe:2.3:o:xen:xen:4.2.1
  • Xen 4.0.1
    cpe:2.3:o:xen:xen:4.0.1
  • Xen 4.0.4
    cpe:2.3:o:xen:xen:4.0.4
  • Xen 4.4.0
    cpe:2.3:o:xen:xen:4.4.0
  • Xen Xen 4.5.0
    cpe:2.3:o:xen:xen:4.5.0
  • Xen 4.3.1
    cpe:2.3:o:xen:xen:4.3.1
  • Xen 4.2.3
    cpe:2.3:o:xen:xen:4.2.3
  • Xen 4.2.2
    cpe:2.3:o:xen:xen:4.2.2
  • Xen 4.2.0
    cpe:2.3:o:xen:xen:4.2.0
  • Xen 4.0.3
    cpe:2.3:o:xen:xen:4.0.3
  • Xen 4.1.0
    cpe:2.3:o:xen:xen:4.1.0
  • Xen 4.1.1
    cpe:2.3:o:xen:xen:4.1.1
  • Xen 4.1.2
    cpe:2.3:o:xen:xen:4.1.2
  • cpe:2.3:a:citrix:xenserver:6.5.0:sp1
    cpe:2.3:a:citrix:xenserver:6.5.0:sp1
  • Citrix XenServer 6.2.0 Service Pack 1
    cpe:2.3:a:citrix:xenserver:6.2.0:sp1
  • Citrix XenServer 6.0.2
    cpe:2.3:a:citrix:xenserver:6.0.2
  • Citrix XenServer 6.0
    cpe:2.3:a:citrix:xenserver:6.0
  • cpe:2.3:a:citrix:xenserver:6.1
    cpe:2.3:a:citrix:xenserver:6.1
  • Citrix XenServer 7.0
    cpe:2.3:a:citrix:xenserver:7.0
CVSS
Base: 7.2 (as of 09-09-2016 - 11:46)
Impact:
Exploitability:
CWE CWE-284
CAPEC
  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Signature Spoofing by Key Theft
    An attacker obtains an authoritative or reputable signer's private signature key by theft and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.
Access
VectorComplexityAuthentication
LOCAL LOW NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
nessus via4
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-0049AA6E5D.NASL
    description x86: Privilege escalation in PV guests [XSA-182, CVE-2016-6258] x86: Missing SMAP whitelisting in 32-bit exception / event delivery [XSA-183, CVE-2016-6259] virtio: unbounded memory allocation issue [XSA-184, CVE-2016-5403] Qemu: scsi: esp: OOB write access in esp_do_dma [CVE-2016-6351] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2016-10-25
    plugin id 92796
    published 2016-08-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92796
    title Fedora 23 : xen (2016-0049aa6e5d) (Bunker Buster)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-3633.NASL
    description Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems : - CVE-2015-8338 Julien Grall discovered that Xen on ARM was susceptible to denial of service via long running memory operations. - CVE-2016-4480 Jan Beulich discovered that incorrect page table handling could result in privilege escalation inside a Xen guest instance. - CVE-2016-4962 Wei Liu discovered multiple cases of missing input sanitising in libxl which could result in denial of service. - CVE-2016-5242 Aaron Cornelius discovered that incorrect resource handling on ARM systems could result in denial of service. - CVE-2016-6258 Jeremie Boutoille discovered that incorrect pagetable handling in PV instances could result in guest to host privilege escalation.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 92614
    published 2016-07-29
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92614
    title Debian DSA-3633-1 : xen - security update (Bunker Buster)
  • NASL family FreeBSD Local Security Checks
    NASL id FREEBSD_PKG_032AA524585411E6B334002590263BF5.NASL
    description The Xen Project reports : The PV pagetable code has fast-paths for making updates to pre-existing pagetable entries, to skip expensive re-validation in safe cases (e.g. clearing only Access/Dirty bits). The bits considered safe were too broad, and not actually safe. A malicious PV guest administrator can escalate their privilege to that of the host.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 92674
    published 2016-08-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92674
    title FreeBSD : xen-kernel -- x86: Privilege escalation in PV guests (032aa524-5854-11e6-b334-002590263bf5) (Bunker Buster)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-01CC766201.NASL
    description x86: Privilege escalation in PV guests [XSA-182, CVE-2016-6258] x86: Missing SMAP whitelisting in 32-bit exception / event delivery [XSA-183, CVE-2016-6259] virtio: unbounded memory allocation issue [XSA-184, CVE-2016-5403] Qemu: scsi: esp: OOB write access in esp_do_dma [CVE-2016-6351] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2016-10-25
    plugin id 92766
    published 2016-08-08
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92766
    title Fedora 24 : xen (2016-01cc766201) (Bunker Buster)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2018-0248.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2018-0248 for details.
    last seen 2019-02-21
    modified 2018-11-19
    plugin id 111992
    published 2018-08-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=111992
    title OracleVM 3.4 : xen (OVMSA-2018-0248) (Bunker Buster) (Foreshadow) (Meltdown) (POODLE) (Spectre)
  • NASL family Misc.
    NASL id XEN_SERVER_XSA-182.NASL
    description According to its self-reported version number, the remote Xen hypervisor is affected by a privilege escalation vulnerability in the paravirtualization (PV) pagetable implementation due to incorrect usage of fast-paths for making updates to pre-existing pagetable entries. An attacker with administrative privileges on a PV guest can exploit this vulnerability to gain administrative privileges on the host operating system. This vulnerability only affects PV guests on x86 hardware; HVM and ARM guests are not affected. Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.
    last seen 2019-02-21
    modified 2018-08-07
    plugin id 92701
    published 2016-08-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92701
    title Xen Privilege Escalation (XSA-182) (Bunker Buster)
  • 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 Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201611-09.NASL
    description The remote host is affected by the vulnerability described in GLSA-201611-09 (Xen: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Xen. Please review the CVE identifiers referenced below for details. Impact : A malicious guest administrator could escalate their privileges on the host system or cause a Denial of Service. Additionally, a malicious unprivileged guest user may be able to obtain or corrupt sensitive information (including cryptographic material) in other programs in the same guest. Workaround : There is no known workaround at this time.
    last seen 2019-02-21
    modified 2016-11-17
    plugin id 94893
    published 2016-11-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=94893
    title GLSA-201611-09 : Xen: Multiple vulnerabilities (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 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 Misc.
    NASL id CITRIX_XENSERVER_CTX214954.NASL
    description The version of Citrix XenServer running on the remote host is missing a security hotfix. It is, therefore, affected by multiple vulnerabilities : - A privilege escalation vulnerability known as 'Bunker Buster' exists in the paravirtualization (PV) pagetable implementation due to incorrect usage of fast-paths for making updates to pre-existing pagetable entries. An attacker with administrative privileges on a PV guest can exploit this vulnerability to gain administrative privileges on the host operating system. This vulnerability only affects PV guests on x86 hardware; HVM and ARM guests are not affected. (CVE-2016-6258) - A denial of service vulnerability exists when handling 32-bit exceptions and event delivery due to missing SMAP whitelisting. A local guest attacker can exploit this to trigger a safety check that will crash other virtual machines on the host system. This vulnerability only exists on 32-bit PV guests running on x86 hardware that supports SMAP. (CVE-2016-6259)
    last seen 2019-02-21
    modified 2018-07-06
    plugin id 92723
    published 2016-08-04
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92723
    title Citrix XenServer Multiple Vulnerabilities (CTX214954) (Bunker Buster)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-2507-1.NASL
    description This update for xen fixes several 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 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-2016-6833: 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-2016-6835: 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) 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 94038
    published 2016-10-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=94038
    title SUSE SLES11 Security Update : xen (SUSE-SU-2016:2507-1) (Bunker Buster)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-2473-1.NASL
    description This update for xen fixes several 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: Information leakage in vmxnet3_complete_packet (bsc#994761). - CVE-2016-6888: Integer overflow in packet initialisation in VMXNET3 device driver. Aprivileged user inside guest c... (bsc#994772). - CVE-2016-6833: Use after free while writing (bsc#994775). - CVE-2016-6835: Buffer overflow in vmxnet_tx_pkt_parse_headers() in vmxnet3 deviceemulation. (bsc#994625). - CVE-2016-6834: An infinite loop during packet fragmentation (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). 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 93935
    published 2016-10-10
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93935
    title SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2016:2473-1) (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 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 92131
confirm
debian DSA-3633
gentoo GLSA-201611-09
sectrack 1036446
Last major update 19-02-2017 - 01:21
Published 02-08-2016 - 12:59
Last modified 30-06-2017 - 21:29
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