SUSE Security Update: Security update for xen
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Announcement ID:    SUSE-SU-2021:3813-1
Rating:             moderate
References:         #1192554 #1192557 #1192559 
Cross-References:   CVE-2021-28704 CVE-2021-28705 CVE-2021-28706
                    CVE-2021-28707 CVE-2021-28708 CVE-2021-28709
                   
CVSS scores:
                    CVE-2021-28704 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-28705 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-28706 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-28707 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-28708 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
                    CVE-2021-28709 (SUSE): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products:
                    SUSE Linux Enterprise Server 12-SP2-BCL
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   An update that fixes 6 vulnerabilities is now available.

Description:

   This update for xen fixes the following issues:

   - CVE-2021-28704, CVE-2021-28707, CVE-2021-28708: Fixed PoD operations on
     misaligned GFNs (XSA-388) (bsc#1192557).
   - CVE-2021-28705, CVE-2021-28709: Fixed issues with partially successful
     P2M updates on x86 (XSA-389) (bsc#1192559).
   - CVE-2021-28706: Fixed guests may exceed their designated memory limit
     (XSA-385) (bsc#1192554).


Special Instructions and Notes:

   Please reboot the system after installing this update.

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 12-SP2-BCL:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2021-3813=1



Package List:

   - SUSE Linux Enterprise Server 12-SP2-BCL (x86_64):

      xen-4.7.6_18-43.82.1
      xen-debugsource-4.7.6_18-43.82.1
      xen-doc-html-4.7.6_18-43.82.1
      xen-libs-32bit-4.7.6_18-43.82.1
      xen-libs-4.7.6_18-43.82.1
      xen-libs-debuginfo-32bit-4.7.6_18-43.82.1
      xen-libs-debuginfo-4.7.6_18-43.82.1
      xen-tools-4.7.6_18-43.82.1
      xen-tools-debuginfo-4.7.6_18-43.82.1
      xen-tools-domU-4.7.6_18-43.82.1
      xen-tools-domU-debuginfo-4.7.6_18-43.82.1


References:

   https://www.suse.com/security/cve/CVE-2021-28704.html
   https://www.suse.com/security/cve/CVE-2021-28705.html
   https://www.suse.com/security/cve/CVE-2021-28706.html
   https://www.suse.com/security/cve/CVE-2021-28707.html
   https://www.suse.com/security/cve/CVE-2021-28708.html
   https://www.suse.com/security/cve/CVE-2021-28709.html
   https://bugzilla.suse.com/1192554
   https://bugzilla.suse.com/1192557
   https://bugzilla.suse.com/1192559