Security update for xen

SUSE Security Update: Security update for xen
Announcement ID: SUSE-SU-2019:14063-1
Rating: important
References: #1027519 #1111331 #1130680
Cross-References:CVE-2018-12126 CVE-2018-12127 CVE-2018-12130 CVE-2018-20815 CVE-2019-11091
Affected Products:
  • SUSE Linux Enterprise Server 11-SP4-LTSS
  • SUSE Linux Enterprise Debuginfo 11-SP4

An update that fixes 5 vulnerabilities is now available.

Description:

This update for xen fixes the following issues:
Four new speculative execution information leak issues have been identified in Intel CPUs. (bsc#1111331)

  • CVE-2018-12126: Microarchitectural Store Buffer Data Sampling (MSBDS)
  • CVE-2018-12127: Microarchitectural Fill Buffer Data Sampling (MFBDS)
  • CVE-2018-12130: Microarchitectural Load Port Data Sampling (MLPDS)
  • CVE-2019-11091: Microarchitectural Data Sampling Uncacheable Memory (MDSUM)

These updates contain the XEN Hypervisor adjustments, that additionally also use CPU Microcode updates.
The mitigation can be controlled via the "mds" commandline option, see the documentation.
For more information on this set of vulnerabilities, check out https://www.suse.com/support/kb/doc/?id=7023736
Other fixes:
  • CVE-2018-20815: Fixed a heap buffer overflow while loading device tree blob (bsc#1130680).
  • Added upstream bug fix (bsc#1027519).

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 Server 11-SP4-LTSS:
    zypper in -t patch slessp4-xen-14063=1
  • SUSE Linux Enterprise Debuginfo 11-SP4:
    zypper in -t patch dbgsp4-xen-14063=1

Package List:

  • SUSE Linux Enterprise Server 11-SP4-LTSS (i586 x86_64):
    • xen-kmp-default-4.4.4_40_3.0.101_108.90-61.46.2
    • xen-libs-4.4.4_40-61.46.2
    • xen-tools-domU-4.4.4_40-61.46.2
  • SUSE Linux Enterprise Server 11-SP4-LTSS (x86_64):
    • xen-4.4.4_40-61.46.2
    • xen-doc-html-4.4.4_40-61.46.2
    • xen-libs-32bit-4.4.4_40-61.46.2
    • xen-tools-4.4.4_40-61.46.2
  • SUSE Linux Enterprise Server 11-SP4-LTSS (i586):
    • xen-kmp-pae-4.4.4_40_3.0.101_108.90-61.46.2
  • SUSE Linux Enterprise Debuginfo 11-SP4 (i586 x86_64):
    • xen-debuginfo-4.4.4_40-61.46.2
    • xen-debugsource-4.4.4_40-61.46.2

References: