SUSE-SU-2017:0571-1: important: Security update for xen

[sle-security-updates at lists.suse.com]

   SUSE Security Update: Security update for xen
______________________________________________________________________________

Announcement ID:    SUSE-SU-2017:0571-1
Rating:             important
References:         #1000195 #1002496 #1005028 #1012651 #1014298 
                    #1014300 #1015169 #1016340 #1022871 #1023004 
                    #1024834 
Cross-References:   CVE-2016-9921 CVE-2016-9922 CVE-2017-2615
                    CVE-2017-2620
Affected Products:
                    SUSE Linux Enterprise Software Development Kit 12-SP2
                    SUSE Linux Enterprise Server 12-SP2
                    SUSE Linux Enterprise Desktop 12-SP2
______________________________________________________________________________

   An update that solves four vulnerabilities and has 7 fixes
   is now available.

Description:


   This update for xen fixes several issues.

   These security issues were fixed:

   - CVE-2017-2620: In CIRRUS_BLTMODE_MEMSYSSRC mode the bitblit copy routine
     cirrus_bitblt_cputovideo failed to check the memory region, allowing for
     an out-of-bounds write that allows for privilege escalation
     (bsc#1024834).
   - CVE-2017-2615: An error in the bitblt copy operation could have allowed
     a malicious guest administrator to cause an out of bounds memory access,
     possibly leading to information disclosure or privilege escalation
     (bsc#1023004).
   - A malicious guest could have, by frequently rebooting over extended
     periods of time, run the host system out of memory, resulting in a
     Denial of Service (DoS) (bsc#1022871)
   - CVE-2016-9921: The Cirrus CLGD 54xx VGA Emulator support was vulnerable
     to a divide by zero issue while copying VGA data. A privileged user
     inside guest could have used this flaw to crash the process instance on
     the host, resulting in DoS (bsc#1015169

   These non-security issues were fixed:

   - bsc#1000195: Prevent panic on CPU0 while booting on SLES 11 SP3
   - bsc#1002496: Added support for reloading clvm in block-dmmd block-dmmd
   - bsc#1005028: Fixed building Xen RPMs from Sources


Patch Instructions:

   To install this SUSE Security Update use YaST online_update.
   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Software Development Kit 12-SP2:

      zypper in -t patch SUSE-SLE-SDK-12-SP2-2017-296=1

   - SUSE Linux Enterprise Server 12-SP2:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-2017-296=1

   - SUSE Linux Enterprise Desktop 12-SP2:

      zypper in -t patch SUSE-SLE-DESKTOP-12-SP2-2017-296=1

   To bring your system up-to-date, use "zypper patch".


Package List:

   - SUSE Linux Enterprise Software Development Kit 12-SP2 (aarch64 x86_64):

      xen-debugsource-4.7.1_06-31.1
      xen-devel-4.7.1_06-31.1

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

      xen-4.7.1_06-31.1
      xen-debugsource-4.7.1_06-31.1
      xen-doc-html-4.7.1_06-31.1
      xen-libs-32bit-4.7.1_06-31.1
      xen-libs-4.7.1_06-31.1
      xen-libs-debuginfo-32bit-4.7.1_06-31.1
      xen-libs-debuginfo-4.7.1_06-31.1
      xen-tools-4.7.1_06-31.1
      xen-tools-debuginfo-4.7.1_06-31.1
      xen-tools-domU-4.7.1_06-31.1
      xen-tools-domU-debuginfo-4.7.1_06-31.1

   - SUSE Linux Enterprise Desktop 12-SP2 (x86_64):

      xen-4.7.1_06-31.1
      xen-debugsource-4.7.1_06-31.1
      xen-libs-32bit-4.7.1_06-31.1
      xen-libs-4.7.1_06-31.1
      xen-libs-debuginfo-32bit-4.7.1_06-31.1
      xen-libs-debuginfo-4.7.1_06-31.1


References:

   https://www.suse.com/security/cve/CVE-2016-9921.html
   https://www.suse.com/security/cve/CVE-2016-9922.html
   https://www.suse.com/security/cve/CVE-2017-2615.html
   https://www.suse.com/security/cve/CVE-2017-2620.html
   https://bugzilla.suse.com/1000195
   https://bugzilla.suse.com/1002496
   https://bugzilla.suse.com/1005028
   https://bugzilla.suse.com/1012651
   https://bugzilla.suse.com/1014298
   https://bugzilla.suse.com/1014300
   https://bugzilla.suse.com/1015169
   https://bugzilla.suse.com/1016340
   https://bugzilla.suse.com/1022871
   https://bugzilla.suse.com/1023004
   https://bugzilla.suse.com/1024834