SUSE Security Update: Security update for xen
______________________________________________________________________________

Announcement ID:    SUSE-SU-2021:1251-1
Rating:             important
References:         #1178591 #1182431 #1182846 
Cross-References:   CVE-2021-20257 CVE-2021-27379
CVSS scores:
                    CVE-2021-20257 (SUSE): 3.2
 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
                    CVE-2021-27379 (NVD) : 7.8
 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-27379 (SUSE): 7.9
 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H

Affected Products:
                    SUSE OpenStack Cloud Crowbar 9
                    SUSE OpenStack Cloud 9
                    SUSE Linux Enterprise Server for SAP 12-SP4
                    SUSE Linux Enterprise Server 12-SP4-LTSS
______________________________________________________________________________

   An update that solves two vulnerabilities and has one
   errata is now available.

Description:

   This update for xen fixes the following issues:

   - CVE-2021-27379: Fixed an issue where entries in the IOMMU were not being
     updated under certain circumstances due to improper backport of XSA-321
     (XSA-366, bsc#1182431)
   - CVE-2021-20257: Fixed an infinite loop in the e1000 NIC emulator
     (bsc#1182846)


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 OpenStack Cloud Crowbar 9:

      zypper in -t patch SUSE-OpenStack-Cloud-Crowbar-9-2021-1251=1

   - SUSE OpenStack Cloud 9:

      zypper in -t patch SUSE-OpenStack-Cloud-9-2021-1251=1

   - SUSE Linux Enterprise Server for SAP 12-SP4:

      zypper in -t patch SUSE-SLE-SAP-12-SP4-2021-1251=1

   - SUSE Linux Enterprise Server 12-SP4-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-SP4-LTSS-2021-1251=1



Package List:

   - SUSE OpenStack Cloud Crowbar 9 (x86_64):

      xen-4.11.4_16-2.51.1
      xen-debugsource-4.11.4_16-2.51.1
      xen-doc-html-4.11.4_16-2.51.1
      xen-libs-32bit-4.11.4_16-2.51.1
      xen-libs-4.11.4_16-2.51.1
      xen-libs-debuginfo-32bit-4.11.4_16-2.51.1
      xen-libs-debuginfo-4.11.4_16-2.51.1
      xen-tools-4.11.4_16-2.51.1
      xen-tools-debuginfo-4.11.4_16-2.51.1
      xen-tools-domU-4.11.4_16-2.51.1
      xen-tools-domU-debuginfo-4.11.4_16-2.51.1

   - SUSE OpenStack Cloud 9 (x86_64):

      xen-4.11.4_16-2.51.1
      xen-debugsource-4.11.4_16-2.51.1
      xen-doc-html-4.11.4_16-2.51.1
      xen-libs-32bit-4.11.4_16-2.51.1
      xen-libs-4.11.4_16-2.51.1
      xen-libs-debuginfo-32bit-4.11.4_16-2.51.1
      xen-libs-debuginfo-4.11.4_16-2.51.1
      xen-tools-4.11.4_16-2.51.1
      xen-tools-debuginfo-4.11.4_16-2.51.1
      xen-tools-domU-4.11.4_16-2.51.1
      xen-tools-domU-debuginfo-4.11.4_16-2.51.1

   - SUSE Linux Enterprise Server for SAP 12-SP4 (x86_64):

      xen-4.11.4_16-2.51.1
      xen-debugsource-4.11.4_16-2.51.1
      xen-doc-html-4.11.4_16-2.51.1
      xen-libs-32bit-4.11.4_16-2.51.1
      xen-libs-4.11.4_16-2.51.1
      xen-libs-debuginfo-32bit-4.11.4_16-2.51.1
      xen-libs-debuginfo-4.11.4_16-2.51.1
      xen-tools-4.11.4_16-2.51.1
      xen-tools-debuginfo-4.11.4_16-2.51.1
      xen-tools-domU-4.11.4_16-2.51.1
      xen-tools-domU-debuginfo-4.11.4_16-2.51.1

   - SUSE Linux Enterprise Server 12-SP4-LTSS (x86_64):

      xen-4.11.4_16-2.51.1
      xen-debugsource-4.11.4_16-2.51.1
      xen-doc-html-4.11.4_16-2.51.1
      xen-libs-32bit-4.11.4_16-2.51.1
      xen-libs-4.11.4_16-2.51.1
      xen-libs-debuginfo-32bit-4.11.4_16-2.51.1
      xen-libs-debuginfo-4.11.4_16-2.51.1
      xen-tools-4.11.4_16-2.51.1
      xen-tools-debuginfo-4.11.4_16-2.51.1
      xen-tools-domU-4.11.4_16-2.51.1
      xen-tools-domU-debuginfo-4.11.4_16-2.51.1


References:

   https://www.suse.com/security/cve/CVE-2021-20257.html
   https://www.suse.com/security/cve/CVE-2021-27379.html
   https://bugzilla.suse.com/1178591
   https://bugzilla.suse.com/1182431
   https://bugzilla.suse.com/1182846