SUSE Security Update: Security update for xen
______________________________________________________________________________

Announcement ID:    SUSE-SU-2020:2791-1
Rating:             important
References:         #1027519 #1176339 #1176341 #1176343 #1176344 
                    #1176345 #1176346 #1176347 #1176348 #1176349 
                    #1176350 
Cross-References:   CVE-2020-25595 CVE-2020-25596 CVE-2020-25597
                    CVE-2020-25598 CVE-2020-25599 CVE-2020-25600
                    CVE-2020-25601 CVE-2020-25602 CVE-2020-25603
                    CVE-2020-25604
Affected Products:
                    SUSE Linux Enterprise Module for Server Applications 15-SP2
                    SUSE Linux Enterprise Module for Basesystem 15-SP2
______________________________________________________________________________

   An update that solves 10 vulnerabilities and has one errata
   is now available.

Description:

   This update for xen fixes the following issues:

   - CVE-2020-25602: Fixed an issue where there was a crash when handling
     guest access to MSR_MISC_ENABLE was thrown (bsc#1176339,XSA-333)
   - CVE-2020-25598: Added a missing unlock in XENMEM_acquire_resource error
     path (bsc#1176341,XSA-334)
   - CVE-2020-25604: Fixed a race condition when migrating timers between x86
     HVM vCPU-s (bsc#1176343,XSA-336)
   - CVE-2020-25595: Fixed an issue where PCI passthrough code was reading
     back hardware registers (bsc#1176344,XSA-337)
   - CVE-2020-25597: Fixed an issue where a valid event channels may not turn
     invalid (bsc#1176346,XSA-338)
   - CVE-2020-25596: Fixed a potential denial of service in x86 pv guest
     kernel via SYSENTER (bsc#1176345,XSA-339)
   - CVE-2020-25603: Fixed an issue due to  missing barriers when
     accessing/allocating an event channel (bsc#1176347,XSA-340)
   - CVE-2020-25600: Fixed out of bounds event channels available to 32-bit
     x86 domains (bsc#1176348,XSA-342)
   - CVE-2020-25599: Fixed race conditions with evtchn_reset()
     (bsc#1176349,XSA-343)
   - CVE-2020-25601: Fixed an issue due to lack of preemption in
     evtchn_reset() / evtchn_destroy() (bsc#1176350,XSA-344)
   - Various other fixes (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 Module for Server Applications 15-SP2:

      zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP2-2020-2791=1

   - SUSE Linux Enterprise Module for Basesystem 15-SP2:

      zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2020-2791=1



Package List:

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

      xen-4.13.1_08-3.10.1
      xen-debugsource-4.13.1_08-3.10.1
      xen-devel-4.13.1_08-3.10.1
      xen-tools-4.13.1_08-3.10.1
      xen-tools-debuginfo-4.13.1_08-3.10.1

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

      xen-tools-xendomains-wait-disk-4.13.1_08-3.10.1

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

      xen-debugsource-4.13.1_08-3.10.1
      xen-libs-4.13.1_08-3.10.1
      xen-libs-debuginfo-4.13.1_08-3.10.1
      xen-tools-domU-4.13.1_08-3.10.1
      xen-tools-domU-debuginfo-4.13.1_08-3.10.1


References:

   https://www.suse.com/security/cve/CVE-2020-25595.html
   https://www.suse.com/security/cve/CVE-2020-25596.html
   https://www.suse.com/security/cve/CVE-2020-25597.html
   https://www.suse.com/security/cve/CVE-2020-25598.html
   https://www.suse.com/security/cve/CVE-2020-25599.html
   https://www.suse.com/security/cve/CVE-2020-25600.html
   https://www.suse.com/security/cve/CVE-2020-25601.html
   https://www.suse.com/security/cve/CVE-2020-25602.html
   https://www.suse.com/security/cve/CVE-2020-25603.html
   https://www.suse.com/security/cve/CVE-2020-25604.html
   https://bugzilla.suse.com/1027519
   https://bugzilla.suse.com/1176339
   https://bugzilla.suse.com/1176341
   https://bugzilla.suse.com/1176343
   https://bugzilla.suse.com/1176344
   https://bugzilla.suse.com/1176345
   https://bugzilla.suse.com/1176346
   https://bugzilla.suse.com/1176347
   https://bugzilla.suse.com/1176348
   https://bugzilla.suse.com/1176349
   https://bugzilla.suse.com/1176350

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