SUSE Security Update: Security update for xen
______________________________________________________________________________

Announcement ID:    SUSE-SU-2020:14521-1
Rating:             important
References:         #1172205 #1173378 #1173380 #1175534 #1176343 
                    #1176344 #1176345 #1176346 #1176347 #1176348 
                    #1176350 
Cross-References:   CVE-2020-0543 CVE-2020-14364 CVE-2020-15565
                    CVE-2020-15567 CVE-2020-25595 CVE-2020-25596
                    CVE-2020-25597 CVE-2020-25600 CVE-2020-25601
                    CVE-2020-25603 CVE-2020-25604
Affected Products:
                    SUSE Linux Enterprise Server 11-SP4-LTSS
                    SUSE Linux Enterprise Debuginfo 11-SP4
______________________________________________________________________________

   An update that fixes 11 vulnerabilities is now available.

Description:

   This update for xen fixes the following issues:

   - CVE-2020-0543: Fixed a leak of Special Register Buffer Data Sampling
     (SRBDS) aka "CrossTalk" (bsc#1172205,XSA-320)
   - CVE-2020-14364: Fixed an out-of-bounds read/write access while
     processing usb packets (bsc#1175534).
   - CVE-2020-15565: Fixed an issue cache write (bsc#1173378,XSA-321).
   - CVE-2020-15567: Fixed an issue with non-atomic  modification of live EPT
     PTE (bsc#1173380,XSA-328)
   - CVE-2020-25595: Fixed an issue where PCI passthrough code was reading
     back hardware registers (bsc#1176344,XSA-337)
   - CVE-2020-25596: Fixed a potential denial of service in x86 pv guest
     kernel via SYSENTER (bsc#1176345,XSA-339)
   - CVE-2020-25597: Fixed an issue where a valid event channels may not turn
     invalid (bsc#1176346,XSA-338)
   - CVE-2020-25600: Fixed out of bounds event channels available to 32-bit
     x86 domains (bsc#1176348,XSA-342)
   - CVE-2020-25601: Fixed an issue due to lack of preemption in
     evtchn_reset() / evtchn_destroy() (bsc#1176350,XSA-344)
   - CVE-2020-25603: Fixed an issue due to  missing barriers when
     accessing/allocating an event channel (bsc#1176347,XSA-340)
   - CVE-2020-25604: Fixed a race condition when migrating timers between x86
     HVM vCPU-s (bsc#1176343,XSA-336)


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-14521=1

   - SUSE Linux Enterprise Debuginfo 11-SP4:

      zypper in -t patch dbgsp4-xen-14521=1



Package List:

   - SUSE Linux Enterprise Server 11-SP4-LTSS (i586 x86_64):

      xen-kmp-default-4.4.4_44_3.0.101_108.117-61.55.1
      xen-libs-4.4.4_44-61.55.1
      xen-tools-domU-4.4.4_44-61.55.1

   - SUSE Linux Enterprise Server 11-SP4-LTSS (x86_64):

      xen-4.4.4_44-61.55.1
      xen-doc-html-4.4.4_44-61.55.1
      xen-libs-32bit-4.4.4_44-61.55.1
      xen-tools-4.4.4_44-61.55.1

   - SUSE Linux Enterprise Server 11-SP4-LTSS (i586):

      xen-kmp-pae-4.4.4_44_3.0.101_108.117-61.55.1

   - SUSE Linux Enterprise Debuginfo 11-SP4 (i586 x86_64):

      xen-debuginfo-4.4.4_44-61.55.1
      xen-debugsource-4.4.4_44-61.55.1


References:

   https://www.suse.com/security/cve/CVE-2020-0543.html
   https://www.suse.com/security/cve/CVE-2020-14364.html
   https://www.suse.com/security/cve/CVE-2020-15565.html
   https://www.suse.com/security/cve/CVE-2020-15567.html
   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-2020-25600.html
   https://www.suse.com/security/cve/CVE-2020-25601.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/1172205
   https://bugzilla.suse.com/1173378
   https://bugzilla.suse.com/1173380
   https://bugzilla.suse.com/1175534
   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/1176350