Security update for xen

SUSE Security Update: Security update for xen
Announcement ID: SUSE-SU-2018:4300-1
Rating: important
References: #1027519 #1078292 #1091107 #1094508 #1103275 #1103276 #1103279 #1105528 #1108940 #1114405 #1115040 #1115045 #1115047
Cross-References: CVE-2018-15468 CVE-2018-15469 CVE-2018-15470 CVE-2018-18883 CVE-2018-19961 CVE-2018-19962 CVE-2018-19965 CVE-2018-19966 CVE-2018-3646
Affected Products:
  • SUSE Linux Enterprise Module for Server Applications 15
  • SUSE Linux Enterprise Module for Basesystem 15

An update that solves 9 vulnerabilities and has four fixes is now available.

Description:

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)

Patch Instructions:

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Enterprise Module for Server Applications 15:
    zypper in -t patch SUSE-SLE-Module-Server-Applications-15-2018-3063=1
  • SUSE Linux Enterprise Module for Basesystem 15:
    zypper in -t patch SUSE-SLE-Module-Basesystem-15-2018-3063=1

Package List:

  • SUSE Linux Enterprise Module for Server Applications 15 (x86_64):
    • xen-4.10.2_04-3.9.1
    • xen-debugsource-4.10.2_04-3.9.1
    • xen-devel-4.10.2_04-3.9.1
    • xen-tools-4.10.2_04-3.9.1
    • xen-tools-debuginfo-4.10.2_04-3.9.1
  • SUSE Linux Enterprise Module for Basesystem 15 (x86_64):
    • xen-debugsource-4.10.2_04-3.9.1
    • xen-libs-4.10.2_04-3.9.1
    • xen-libs-debuginfo-4.10.2_04-3.9.1
    • xen-tools-domU-4.10.2_04-3.9.1
    • xen-tools-domU-debuginfo-4.10.2_04-3.9.1

References: