Security update for xen SUSE Patch security@suse.de SUSE Security Team openSUSE-SU-2018:4304-1 Final 1 1 2018-12-29T10:19:45Z current 2018-12-29T10:19:45Z 2018-12-29T10:19:45Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for xen This update for xen fixes the following issues: Update to Xen 4.10.2 bug fix release (bsc#1027519). Security vulnerabilities fixed: - CVE-2018-19961, CVE-2018-19962: Fixed an issue related to insufficient TLB flushing with AMD IOMMUs, which potentially allowed a guest to escalate its privileges, may cause a Denial of Service (DoS) affecting the entire host, or may be able to access data it is not supposed to access. (XSA-275) (bsc#1115040) - CVE-2018-19965: Fixed an issue related to the INVPCID instruction in case non-canonical addresses are accessed, which may allow a guest to cause Xen to crash, resulting in a Denial of Service (DoS) affecting the entire host. (XSA-279) (bsc#1115045) - CVE-2018-19966: Fixed an issue related to a previous fix for XSA-240, which conflicted with shadow paging and allowed a guest to cause Xen to crash, resulting in a Denial of Service (DoS). (XSA-280) (bsc#1115047) - CVE-2018-18883: Fixed an issue related to inproper restriction of nested VT-x, which allowed a guest to cause Xen to crash, resulting in a Denial of Service (DoS). (XSA-278) (bsc#1114405) - CVE-2018-15468: Fixed incorrect MSR_DEBUGCTL handling, which allowed guests to enable Branch Trace Store and may cause a Denial of Service (DoS) of the entire host. (XSA-269) (bsc#1103276) - CVE-2018-15469: Fixed use of v2 grant tables on ARM, which were not properly implemented and may cause a Denial of Service (DoS). (XSA-268) (bsc#1103275) - CVE-2018-15470: Fixed an issue in the logic in oxenstored for handling writes, which allowed a guest to write memory unbounded leading to system-wide Denial of Service (DoS). (XSA-272) (bsc#1103279) - CVE-2018-3646: Mitigations for VMM aspects of L1 Terminal Fault (XSA-273) (bsc#1091107) Other bugs fixed: - Fixed an issue related to a domU hang on SLE12-SP3 HV (bsc#1108940) - Fixed an issue with xpti=no-dom0 not working as expected (bsc#1105528) - Fixed a kernel oops related to fs/dcache.c called by d_materialise_unique() (bsc#1094508) This update was imported from the SUSE:SLE-15:Update update project. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00073.html E-Mail link for openSUSE-SU-2018:4304-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings openSUSE Leap 15.0 xen-4.10.2_04-lp150.2.12.1 xen-devel-4.10.2_04-lp150.2.12.1 xen-doc-html-4.10.2_04-lp150.2.12.1 xen-libs-4.10.2_04-lp150.2.12.1 xen-libs-32bit-4.10.2_04-lp150.2.12.1 xen-tools-4.10.2_04-lp150.2.12.1 xen-tools-domU-4.10.2_04-lp150.2.12.1 xen-4.10.2_04-lp150.2.12.1 as a component of openSUSE Leap 15.0 xen-devel-4.10.2_04-lp150.2.12.1 as a component of openSUSE Leap 15.0 xen-doc-html-4.10.2_04-lp150.2.12.1 as a component of openSUSE Leap 15.0 xen-libs-4.10.2_04-lp150.2.12.1 as a component of openSUSE Leap 15.0 xen-libs-32bit-4.10.2_04-lp150.2.12.1 as a component of openSUSE Leap 15.0 xen-tools-4.10.2_04-lp150.2.12.1 as a component of openSUSE Leap 15.0 xen-tools-domU-4.10.2_04-lp150.2.12.1 as a component of openSUSE Leap 15.0 An issue was discovered in Xen through 4.11.x. The DEBUGCTL MSR contains several debugging features, some of which virtualise cleanly, but some do not. In particular, Branch Trace Store is not virtualised by the processor, and software has to be careful to configure it suitably not to lock up the core. As a result, it must only be available to fully trusted guests. Unfortunately, in the case that vPMU is disabled, all value checking was skipped, allowing the guest to choose any MSR_DEBUGCTL setting it likes. A malicious or buggy guest administrator (on Intel x86 HVM or PVH) can lock up the entire host, causing a Denial of Service. CVE-2018-15468 openSUSE Leap 15.0:xen-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-devel-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-doc-html-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-32bit-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-domU-4.10.2_04-lp150.2.12.1 moderate Please Install the update. http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00073.html https://www.suse.com/security/cve/CVE-2018-15468.html CVE-2018-15468 https://bugzilla.suse.com/1103276 SUSE Bug 1103276 An issue was discovered in Xen through 4.11.x. ARM never properly implemented grant table v2, either in the hypervisor or in Linux. Unfortunately, an ARM guest can still request v2 grant tables; they will simply not be properly set up, resulting in subsequent grant-related hypercalls hitting BUG() checks. An unprivileged guest can cause a BUG() check in the hypervisor, resulting in a denial-of-service (crash). CVE-2018-15469 openSUSE Leap 15.0:xen-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-devel-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-doc-html-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-32bit-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-domU-4.10.2_04-lp150.2.12.1 moderate Please Install the update. http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00073.html https://www.suse.com/security/cve/CVE-2018-15469.html CVE-2018-15469 https://bugzilla.suse.com/1103275 SUSE Bug 1103275 An issue was discovered in Xen through 4.11.x. The logic in oxenstored for handling writes depended on the order of evaluation of expressions making up a tuple. As indicated in section 7.7.3 "Operations on data structures" of the OCaml manual, the order of evaluation of subexpressions is not specified. In practice, different implementations behave differently. Thus, oxenstored may not enforce the configured quota-maxentity. This allows a malicious or buggy guest to write as many xenstore entries as it wishes, causing unbounded memory usage in oxenstored. This can lead to a system-wide DoS. CVE-2018-15470 openSUSE Leap 15.0:xen-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-devel-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-doc-html-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-32bit-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-domU-4.10.2_04-lp150.2.12.1 moderate Please Install the update. http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00073.html https://www.suse.com/security/cve/CVE-2018-15470.html CVE-2018-15470 https://bugzilla.suse.com/1103279 SUSE Bug 1103279 An issue was discovered in Xen 4.9.x through 4.11.x, on Intel x86 platforms, allowing x86 HVM and PVH guests to cause a host OS denial of service (NULL pointer dereference) or possibly have unspecified other impact because nested VT-x is not properly restricted. CVE-2018-18883 openSUSE Leap 15.0:xen-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-devel-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-doc-html-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-32bit-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-domU-4.10.2_04-lp150.2.12.1 moderate Please Install the update. http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00073.html https://www.suse.com/security/cve/CVE-2018-18883.html CVE-2018-18883 https://bugzilla.suse.com/1114405 SUSE Bug 1114405 An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes. CVE-2018-19961 openSUSE Leap 15.0:xen-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-devel-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-doc-html-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-32bit-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-domU-4.10.2_04-lp150.2.12.1 important Please Install the update. http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00073.html https://www.suse.com/security/cve/CVE-2018-19961.html CVE-2018-19961 https://bugzilla.suse.com/1115040 SUSE Bug 1115040 An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because small IOMMU mappings are unsafely combined into larger ones. CVE-2018-19962 openSUSE Leap 15.0:xen-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-devel-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-doc-html-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-32bit-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-domU-4.10.2_04-lp150.2.12.1 important Please Install the update. http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00073.html https://www.suse.com/security/cve/CVE-2018-19962.html CVE-2018-19962 https://bugzilla.suse.com/1115040 SUSE Bug 1115040 An issue was discovered in Xen through 4.11.x allowing 64-bit PV guest OS users to cause a denial of service (host OS crash) because #GP[0] can occur after a non-canonical address is passed to the TLB flushing code. NOTE: this issue exists because of an incorrect CVE-2017-5754 (aka Meltdown) mitigation. CVE-2018-19965 openSUSE Leap 15.0:xen-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-devel-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-doc-html-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-32bit-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-domU-4.10.2_04-lp150.2.12.1 moderate Please Install the update. http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00073.html https://www.suse.com/security/cve/CVE-2018-19965.html CVE-2018-19965 https://bugzilla.suse.com/1115045 SUSE Bug 1115045 An issue was discovered in Xen through 4.11.x allowing x86 PV guest OS users to cause a denial of service (host OS crash) or possibly gain host OS privileges because of an interpretation conflict for a union data structure associated with shadow paging. NOTE: this issue exists because of an incorrect fix for CVE-2017-15595. CVE-2018-19966 openSUSE Leap 15.0:xen-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-devel-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-doc-html-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-32bit-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-domU-4.10.2_04-lp150.2.12.1 moderate Please Install the update. http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00073.html https://www.suse.com/security/cve/CVE-2018-19966.html CVE-2018-19966 https://bugzilla.suse.com/1115047 SUSE Bug 1115047 Systems with microprocessors utilizing speculative execution and address translations may allow unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis. CVE-2018-3646 openSUSE Leap 15.0:xen-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-devel-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-doc-html-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-32bit-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-libs-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-4.10.2_04-lp150.2.12.1 openSUSE Leap 15.0:xen-tools-domU-4.10.2_04-lp150.2.12.1 moderate Please Install the update. http://lists.opensuse.org/opensuse-security-announce/2018-12/msg00073.html https://www.suse.com/security/cve/CVE-2018-3646.html CVE-2018-3646 https://bugzilla.suse.com/1087078 SUSE Bug 1087078 https://bugzilla.suse.com/1087081 SUSE Bug 1087081 https://bugzilla.suse.com/1089343 SUSE Bug 1089343 https://bugzilla.suse.com/1091107 SUSE Bug 1091107 https://bugzilla.suse.com/1099306 SUSE Bug 1099306 https://bugzilla.suse.com/1104365 SUSE Bug 1104365 https://bugzilla.suse.com/1104894 SUSE Bug 1104894 https://bugzilla.suse.com/1106548 SUSE Bug 1106548 https://bugzilla.suse.com/1113534 SUSE Bug 1113534