SUSE Security Update: Security update for xen
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Announcement ID:    SUSE-SU-2020:3049-1
Rating:             important
References:         #1177409 #1177412 #1177413 #1177414 
Cross-References:   CVE-2020-27670 CVE-2020-27671 CVE-2020-27672
                    CVE-2020-27673
Affected Products:
                    SUSE Linux Enterprise Module for Server Applications 15-SP2
                    SUSE Linux Enterprise Module for Basesystem 15-SP2
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   An update that fixes four vulnerabilities is now available.

Description:

   This update for xen fixes the following issues:

   - bsc#1177409 - VUL-0: CVE-2020-27673: xen: x86 PV guest INVLPG-like
     flushes may leave stale TLB entries (XSA-286)
   - bsc#1177412 - VUL-0: CVE-2020-27672: xen: Race condition in Xen mapping
     code (XSA-345)
   - bsc#1177413 - VUL-0: CVE-2020-27671: xen: undue deferral of IOMMU TLB
     flushes (XSA-346)
   - bsc#1177414 - VUL-0: CVE-2020-27670: xen: unsafe AMD IOMMU page table
     updates (XSA-347)


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-SP2:

      zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP2-2020-3049=1

   - SUSE Linux Enterprise Module for Basesystem 15-SP2:

      zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2020-3049=1



Package List:

   - SUSE Linux Enterprise Module for Server Applications 15-SP2 (noarch):

      xen-tools-xendomains-wait-disk-4.13.1_10-3.13.1

   - SUSE Linux Enterprise Module for Server Applications 15-SP2 (x86_64):

      xen-4.13.1_10-3.13.1
      xen-debugsource-4.13.1_10-3.13.1
      xen-devel-4.13.1_10-3.13.1
      xen-tools-4.13.1_10-3.13.1
      xen-tools-debuginfo-4.13.1_10-3.13.1

   - SUSE Linux Enterprise Module for Basesystem 15-SP2 (x86_64):

      xen-debugsource-4.13.1_10-3.13.1
      xen-libs-4.13.1_10-3.13.1
      xen-libs-debuginfo-4.13.1_10-3.13.1
      xen-tools-domU-4.13.1_10-3.13.1
      xen-tools-domU-debuginfo-4.13.1_10-3.13.1


References:

   https://www.suse.com/security/cve/CVE-2020-27670.html
   https://www.suse.com/security/cve/CVE-2020-27671.html
   https://www.suse.com/security/cve/CVE-2020-27672.html
   https://www.suse.com/security/cve/CVE-2020-27673.html
   https://bugzilla.suse.com/1177409
   https://bugzilla.suse.com/1177412
   https://bugzilla.suse.com/1177413
   https://bugzilla.suse.com/1177414