ID CVE-2018-7541
Summary An issue was discovered in Xen through 4.10.x allowing guest OS users to cause a denial of service (hypervisor crash) or gain privileges by triggering a grant-table transition from v2 to v1.
References
Vulnerable Configurations
  • Xen 4.10.0
    cpe:2.3:o:xen:xen:4.10.0
  • Debian Linux 9.0
    cpe:2.3:o:debian:debian_linux:9.0
CVSS
Base: 6.1
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.
nessus via4
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2018-0909-1.NASL
    description This update for xen fixes the following issues: Update to Xen 4.7.5 bug fix only release (bsc#1027519) Security issues fixed : - CVE-2018-7540: Fixed DoS via non-preemptable L3/L4 pagetable freeing (XSA-252) (bsc#1080635) - CVE-2018-7541: A grant table v2 -> v1 transition may crash Xen (XSA-255) (bsc#1080662) - CVE-2017-5753,CVE-2017-5715,CVE-2017-5754 Fixed information leaks via side effects of speculative execution (XSA-254). Includes Spectre v2 mitigation. (bsc#1074562) - Preserve xen-syms from xen-dbg.gz to allow processing vmcores with crash(1) (bsc#1087251) - Xen HVM: Fixed unchecked MSR access error (bsc#1072834) - Add script, udev rule and systemd service to watch for vcpu online/offline events in a HVM domU They are triggered via xl vcpu-set domU N (fate#324965) - Make sure tools and tools-domU require libs from the very same build 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 2018-12-01
    plugin id 109001
    published 2018-04-11
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=109001
    title SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:0909-1) (Meltdown) (Spectre)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2018-0021.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : - BUILDINFO: xen commit=b2a6db11ced11291a472bc1bda20ce329eda4d66 - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - gnttab: don't blindly free status pages upon version change (Andrew Cooper)  [Orabug: 27571750]  (CVE-2018-7541) - memory: don't implicitly unpin for decrease-reservation (Andrew Cooper)  [Orabug: 27571737]  (CVE-2018-7540) - BUILDINFO: xen commit=873b8236e886daa3c26dae28d0c1c53d88447dc0 - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - xend: if secure boot is enabled don't write pci config space (Elena Ufimtseva)  [Orabug: 27533309] - BUILDINFO: xen commit=81602116e75b6bbc519366b242c71888aa1b1673 - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - x86/spec_ctrl: Fix several bugs in SPEC_CTRL_ENTRY_FROM_INTR_IST (Andrew Cooper)  [Orabug: 27553376]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - x86: allow easier disabling of BTI mitigations (Zhenzhong Duan) [Orabug: 27553376]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - x86/boot: Make alternative patching NMI-safe (Andrew Cooper) [Orabug: 27553376]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - xen/cmdline: Fix parse_boolean for unadorned values (Andrew Cooper)  [Orabug: 27553376]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - Optimize the context switch code a bit (Zhenzhong Duan)  [Orabug: 27553376]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - Update init_speculation_mitigations to upstream's (Zhenzhong Duan)  [Orabug: 27553376]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - x86/entry: Avoid using alternatives in NMI/#MC paths (Andrew Cooper)  [Orabug: 27553376]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - Update RSB related implementation to upstream ones (Zhenzhong Duan)  [Orabug: 27553376]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - BUILDINFO: xen commit=c6a2fe8d72a3eba01b22cbe495e60cb6837fe8d0 - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - x86: Expose CPUID.7, EDX.26->27 and CPUID.0x80000008, EBX.12 (redux) (Konrad Rzeszutek Wilk)  [Orabug: 27445678] - BUILDINFO: xen commit=9657d91fcbf49798d2c5135866e1947113d536dc - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - x86/Spectre: Set thunk to THUNK_NONE if compiler support is not available (Boris Ostrovsky)  [Orabug: 27375688] - BUILDINFO: xen commit=4e5826dfcb56d3a868a9934646989f8483f03b3c - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - xen: No dependencies on dracut and microcode_ctl RPMs (Boris Ostrovsky)  [Orabug: 27409718]
    last seen 2019-02-21
    modified 2018-11-19
    plugin id 107130
    published 2018-03-05
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=107130
    title OracleVM 3.4 : xen (OVMSA-2018-0021) (Meltdown) (Spectre)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DLA-1300.NASL
    description Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, informations leaks or privilege escalation. For Debian 7 'Wheezy', these problems have been fixed in version 4.1.6.lts1-13. 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 2018-03-19
    plugin id 107134
    published 2018-03-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=107134
    title Debian DLA-1300-1 : xen security update
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2018-0218.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2018-0218 for details.
    last seen 2019-02-21
    modified 2018-11-19
    plugin id 109987
    published 2018-05-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=109987
    title OracleVM 3.4 : xen (OVMSA-2018-0218) (Meltdown) (Spectre)
  • NASL family Misc.
    NASL id XEN_SERVER_XSA-255.NASL
    description According to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a denial of service vulnerability. 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 2018-08-15
    plugin id 107098
    published 2018-03-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=107098
    title Xen gnttab_map_frame() Function Missing Mapping Check Upgrade Guest-to-host DoS (XSA-255)
  • NASL family Misc.
    NASL id CITRIX_XENSERVER_CTX232655.NASL
    description The version of Citrix XenServer running on the remote host is missing a security hotfix. It is, therefore, affected by multiple vulnerabilities.
    last seen 2019-02-21
    modified 2018-07-09
    plugin id 108887
    published 2018-04-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=108887
    title Citrix XenServer Multiple Vulnerabilities (CTX232655)
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201810-06.NASL
    description The remote host is affected by the vulnerability described in GLSA-201810-06 (Xen: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Xen. Please review the referenced CVE identifiers for details. Impact : A local attacker could cause a Denial of Service condition or disclose sensitive information. Workaround : There is no known workaround at this time.
    last seen 2019-02-21
    modified 2018-10-31
    plugin id 118506
    published 2018-10-31
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=118506
    title GLSA-201810-06 : Xen: Multiple vulnerabilities (Foreshadow) (Meltdown) (Spectre)
  • 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 Fedora Local Security Checks
    NASL id FEDORA_2018-C553A586C8.NASL
    description add Xen page-table isolation (XPTI) mitigation and Branch Target Injection (BTI) mitigation for XSA-254 DoS via non-preemptable L3/L4 pagetable freeing [XSA-252] (#1549568) grant table v2 -> v1 transition may crash Xen [XSA-255] (#1549570) x86 PVH guest without LAPIC may DoS the host [XSA-256] (#1549572) 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 2018-03-19
    plugin id 107176
    published 2018-03-07
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=107176
    title Fedora 27 : xen (2018-c553a586c8)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2018-0272.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2018-0272 for details.
    last seen 2019-02-21
    modified 2018-11-15
    plugin id 118963
    published 2018-11-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=118963
    title OracleVM 3.2 : xen (OVMSA-2018-0272) (Foreshadow) (Spectre)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2018-454.NASL
    description This update for xen to version 4.9.2 fixes several issues. This feature was added : - Added script, udev rule and systemd service to watch for vcpu online/offline events in a HVM domU. They are triggered via 'xl vcpu-set domU N' These security issues were fixed : - CVE-2018-8897: Prevent mishandling of debug exceptions on x86 (XSA-260, bsc#1090820) - Handle HPET timers in IO-APIC mode correctly to prevent malicious or buggy HVM guests from causing a hypervisor crash or potentially privilege escalation/information leaks (XSA-261, bsc#1090822) - Prevent unbounded loop, induced by qemu allowing an attacker to permanently keep a physical CPU core busy (XSA-262, bsc#1090823) - CVE-2018-10472: x86 HVM guest OS users (in certain configurations) were able to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot (bsc#1089152). - CVE-2018-10471: x86 PV guest OS users were able to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754 (bsc#1089635). - CVE-2018-7540: x86 PV guest OS users were able to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing (bsc#1080635). - CVE-2018-7541: Guest OS users were able to cause a denial of service (hypervisor crash) or gain privileges by triggering a grant-table transition from v2 to v1 (bsc#1080662). - CVE-2018-7542: x86 PVH guest OS users were able to cause a denial of service (NULL pointer dereference and hypervisor crash) by leveraging the mishandling of configurations that lack a Local APIC (bsc#1080634). These non-security issues were fixed : - bsc#1087252: Update built-in defaults for xenstored in stubdom, keep default to run xenstored as daemon in dom0 - bsc#1087251: Preserve xen-syms from xen-dbg.gz to allow processing vmcores with crash(1) - bsc#1072834: Prevent unchecked MSR access error This update was imported from the SUSE:SLE-12-SP3:Update update project.
    last seen 2019-02-21
    modified 2018-12-18
    plugin id 109751
    published 2018-05-14
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=109751
    title openSUSE Security Update : xen (openSUSE-2018-454) (Meltdown)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-4131.NASL
    description Multiple vulnerabilities have been discovered in the Xen hypervisor : - CVE-2018-7540 Jann Horn discovered that missing checks in page table freeing may result in denial of service. - CVE-2018-7541 Jan Beulich discovered that incorrect error handling in grant table checks may result in guest-to-host denial of service and potentially privilege escalation. - CVE-2018-7542 Ian Jackson discovered that insufficient handling of x86 PVH guests without local APICs may result in guest-to-host denial of service.
    last seen 2019-02-21
    modified 2018-11-13
    plugin id 107123
    published 2018-03-05
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=107123
    title Debian DSA-4131-1 : xen - security update
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DLA-1577.NASL
    description Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, informations leaks or privilege escalation. For Debian 8 'Jessie', these problems have been fixed in version 4.4.4lts4-0+deb8u1. 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 2018-11-13
    plugin id 118892
    published 2018-11-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=118892
    title Debian DLA-1577-1 : xen security update
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2018-0678-1.NASL
    description This update for xen fixes several issues. These security issues were fixed : - CVE-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent information leaks via side effects of speculative execution, aka 'Spectre' and 'Meltdown' attacks (bsc#1074562, bsc#1068032) - CVE-2018-5683: The vga_draw_text function allowed local OS guest privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) by leveraging improper memory address validation (bsc#1076116). - CVE-2017-18030: The cirrus_invalidate_region function allowed local OS guest privileged users to cause a denial of service (out-of-bounds array access and QEMU process crash) via vectors related to negative pitch (bsc#1076180). - CVE-2017-15595: x86 PV guest OS users were able to cause a DoS (unbounded recursion, stack consumption, and hypervisor crash) or possibly gain privileges via crafted page-table stacking (bsc#1061081) - CVE-2017-17566: Prevent PV guest OS users to cause a denial of service (host OS crash) or gain host OS privileges in shadow mode by mapping a certain auxiliary page (bsc#1070158). - CVE-2017-17563: Prevent guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode (bsc#1070159). - CVE-2017-17564: Prevent guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging incorrect error handling for reference counting in shadow mode (bsc#1070160). - CVE-2017-17565: Prevent PV guest OS users to cause a denial of service (host OS crash) if shadow mode and log-dirty mode are in place, because of an incorrect assertion related to M2P (bsc#1070163). - Added missing intermediate preemption checks for guest requesting removal of memory. This allowed malicious guest administrator to cause denial of service due to the high cost of this operation (bsc#1080635). - Because of XEN not returning the proper error messages when transitioning grant tables from v2 to v1 a malicious guest was able to cause DoS or potentially allowed for privilege escalation as well as information leaks (bsc#1080662). - CVE-2017-5898: The CCID Card device emulator support was vulnerable to an integer overflow flaw allowing a privileged user to crash the Qemu process on the host resulting in DoS (bsc#1024307) - Unprivileged domains could have issued well-timed writes to xenstore which conflict with transactions to stall progress of the control domain or driver domain, possibly leading to DoS (bsc#1030144, XSA-206). 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 2018-12-01
    plugin id 108369
    published 2018-03-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=108369
    title SUSE SLES11 Security Update : xen (SUSE-SU-2018:0678-1) (Meltdown) (Spectre)
  • NASL family Misc.
    NASL id CITRIX_XENSERVER_CTX232096.NASL
    description The version of Citrix XenServer running on the remote host is missing a security hotfix. It is, therefore, affected by multiple vulnerabilities.
    last seen 2019-02-21
    modified 2018-08-09
    plugin id 108886
    published 2018-04-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=108886
    title Citrix XenServer Multiple Vulnerabilities (CTX232096)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2018-0020.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=9ccc143584e12027a8db854d19ce8a120d22cfac - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - gnttab: don't blindly free status pages upon version change (Andrew Cooper)  [Orabug: 27614581]  (CVE-2018-7541) - memory: don't implicitly unpin for decrease-reservation (Andrew Cooper)  [Orabug: 27614605]  (CVE-2018-7540) - xend: allow setting topology if smt is off in bios (Elena Ufimtseva)  - x86/svm: clear CPUID IBPB when feature is not supported (Elena Ufimtseva)  [Orabug: 27416699] - x86/domain: Move hvm_vcpu_initialize before cpuid_policy_changed (Elena Ufimtseva)  [Orabug: 27416699] - x86, amd_ucode: support multiple container files appended together (Aravind Gopalakrishnan)  [Orabug: 27416699] - x86/intel: change default governor to performance (Joao Martins) - x86/cpuidle: Disable deep C-states due to erratum AAJ72 (Joao Martins)  [Orabug: 27614625] - Revert 'set max cstate to 1' (Joao Martins)  [Orabug: 27614625] - x86/cpuidle: add new CPU families (Jan Beulich)  [Orabug: 27614625] - x86/Intel: Broadwell doesn't have PKG_C[8,9,10]_RESIDENCY MSRs (Jan Beulich)  [Orabug: 27614625] - x86: support newer Intel CPU models (Jan Beulich)  [Orabug: 27614625] - mwait-idle: add KBL support (Len Brown)  [Orabug: 27614625] - mwait-idle: add SKX support (Len Brown)  [Orabug: 27614625] - mwait_idle: Skylake Client Support (Len Brown)  [Orabug: 27614625] - x86: support newer Intel CPU models (Jan Beulich)  [Orabug: 27614625] - x86/idle: update to include further package/core residency MSRs (Jan Beulich)  [Orabug: 27614625] - mwait-idle: support additional Broadwell model (Len Brown) [Orabug: 27614625] - x86/mwait-idle: Broadwell support (Len Brown)  [Orabug: 27614625] - x86/mwait-idle: disable Baytrail Core and Module C6 auto-demotion (Len Brown)  [Orabug: 27614625] - mwait-idle: add CPU model 54 (Atom N2000 series) (Jan Kiszka) [Orabug: 27614625] - mwait-idle: support Bay Trail (Len Brown)  [Orabug: 27614625] - mwait-idle: allow sparse sub-state numbering, for Bay Trail (Len Brown)  [Orabug: 27614625] - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=c837c35e1c04791a50f930926ba815ca5b4d3661 - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - xend: restore smt parameter on guest reboot (Elena Ufimtseva) [Orabug: 27574191] - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=f36f7903ae0886ab4ef7e3e01c83c9dba819537b - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - x86/spec_ctrl: Fix several bugs in SPEC_CTRL_ENTRY_FROM_INTR_IST (Andrew Cooper)  [Orabug: 27553369]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - x86: allow easier disabling of BTI mitigations (Zhenzhong Duan) [Orabug: 27553369]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - x86/boot: Make alternative patching NMI-safe (Andrew Cooper) [Orabug: 27553369]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - xen/cmdline: Fix parse_boolean for unadorned values (Andrew Cooper)  [Orabug: 27553369]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - Optimize the context switch code a bit (Zhenzhong Duan)  [Orabug: 27553369]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - Update init_speculation_mitigations to upstream's (Zhenzhong Duan)  [Orabug: 27553369]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - x86/entry: Avoid using alternatives in NMI/#MC paths (Andrew Cooper)  [Orabug: 27553369]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - Update RSB related implementation to upstream ones (Zhenzhong Duan)  [Orabug: 27553369]  (CVE-2017-5753) (CVE-2017-5715) (CVE-2017-5754) - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=bdecffda647e17f8aaeb4057bd1064236075bc9c - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - xend: if secure boot is enabled don't write pci config space (Elena Ufimtseva)  [Orabug: 27533309] - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=46aa4f995b266e9dc0bce98b448423c5fdc79fde - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - hvmloader: Correct nr_vnodes when init_vnuma_info fails (Annie Li)  - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=1fb819ca1b801af1f59983f34776501336a57979 - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - Fail migration if destination does not allow pv guest running (Annie Li)  [Orabug: 27465310] - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=dfc241a5b6a952bde385b1d68ef42acf8f80302c - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - x86: Expose CPUID.7, EDX.26->27 and CPUID.0x80000008, EBX.12 (redux) (Konrad Rzeszutek Wilk)  [Orabug: 27445667] - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=d5afa57c42732dc35a572582099c67ee3c397434 - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - Enable creating pv guest on OVM3.4.4 by default (Annie Li) [Orabug: 27424482] - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=619dd3aa6aac97dbc9f23fdae3d6fd6dfab8a0da - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - xen/x86: Make sure identify_cpu is called with traps enabled (Joao Martins)  [Orabug: 27393237] - xend: disallow pv guests to run (Joao Martins)  [Orabug: 27370330] - hvmloader, x86/hvm, domctl: enumerate apicid based on vcpu_to_vnode (Joao Martins)  [Orabug: 27119689] - xend: conditionally use dom0 vcpus for vnuma auto (Joao Martins) - x86/Spectre: Set thunk to THUNK_NONE if compiler support is not available (Boris Ostrovsky)  [Orabug: 27375704] - BUILDINFO: OVMF commit=173bf5c847e3ca8b42c11796ce048d8e2e916ff8 - BUILDINFO: xen commit=1d2270f50ef2b1b22b8f6ee7a9b571ea96f7f37b - BUILDINFO: QEMU upstream commit=8bff6989bd0bafcc0ddf859c23ce6a2ff21a80ff - BUILDINFO: QEMU traditional commit=346fdd7edd73f8287d0d0a2bab9c67b71bc6b8ba - BUILDINFO: IPXE commit=9a93db3f0947484e30e753bbd61a10b17336e20e - BUILDINFO: SeaBIOS commit=7d9cbe613694924921ed1a6f8947d711c5832eee - xen: No dependencies on dracut and microcode_ctl RPMs (Boris Ostrovsky)  [Orabug: 27409734]
    last seen 2019-02-21
    modified 2018-11-19
    plugin id 107129
    published 2018-03-05
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=107129
    title OracleVM 3.4 : xen (OVMSA-2018-0020) (Meltdown) (Spectre)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2018-1184-1.NASL
    description This update for xen to version 4.9.2 fixes several issues. This feature was added : - Added script, udev rule and systemd service to watch for vcpu online/offline events in a HVM domU. They are triggered via 'xl vcpu-set domU N' These security issues were fixed : - CVE-2018-8897: Prevent mishandling of debug exceptions on x86 (XSA-260, bsc#1090820) - Handle HPET timers in IO-APIC mode correctly to prevent malicious or buggy HVM guests from causing a hypervisor crash or potentially privilege escalation/information leaks (XSA-261, bsc#1090822) - Prevent unbounded loop, induced by qemu allowing an attacker to permanently keep a physical CPU core busy (XSA-262, bsc#1090823) - CVE-2018-10472: x86 HVM guest OS users (in certain configurations) were able to read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot (bsc#1089152). - CVE-2018-10471: x86 PV guest OS users were able to cause a denial of service (out-of-bounds zero write and hypervisor crash) via unexpected INT 80 processing, because of an incorrect fix for CVE-2017-5754 (bsc#1089635). - CVE-2018-7540: x86 PV guest OS users were able to cause a denial of service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing (bsc#1080635). - CVE-2018-7541: Guest OS users were able to cause a denial of service (hypervisor crash) or gain privileges by triggering a grant-table transition from v2 to v1 (bsc#1080662). - CVE-2018-7542: x86 PVH guest OS users were able to cause a denial of service (NULL pointer dereference and hypervisor crash) by leveraging the mishandling of configurations that lack a Local APIC (bsc#1080634). 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 2018-12-01
    plugin id 109677
    published 2018-05-10
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=109677
    title SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:1184-1) (Meltdown)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2018-0746DAC335.NASL
    description update Xen page-table isolation (XPTI) mitigation and add Branch Target Injection (BTI) mitigation for XSA-254 DoS via non-preemptable L3/L4 pagetable freeing [XSA-252] (#1549568) grant table v2 -> v1 transition may crash Xen [XSA-255] (#1549570) x86 PVH guest without LAPIC may DoS the host [XSA-256] (#1549572) 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 2018-03-21
    plugin id 108492
    published 2018-03-21
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=108492
    title Fedora 26 : xen (2018-0746dac335)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2018-0271.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : please see Oracle VM Security Advisory OVMSA-2018-0271 for details.
    last seen 2019-02-21
    modified 2018-11-15
    plugin id 118962
    published 2018-11-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=118962
    title OracleVM 3.3 : xen (OVMSA-2018-0271) (Foreshadow) (Spectre)
refmap via4
bid 103177
confirm
debian DSA-4131
gentoo GLSA-201810-06
mlist
  • [debian-lts-announce] 20180306 [SECURITY] [DLA 1300-1] xen security update
  • [debian-lts-announce] 20181112 [SECURITY] [DLA 1577-1] xen security update
sectrack 1040775
Last major update 27-02-2018 - 14:29
Published 27-02-2018 - 14:29
Last modified 13-11-2018 - 06:29
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