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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3188
                          Security update for xen
                              19 October 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           xen
Publisher:         SUSE
Operating System:  SUSE
Impact/Access:     Root Compromise        -- Existing Account
                   Access Privileged Data -- Existing Account
                   Denial of Service      -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-10472 CVE-2018-10471 CVE-2018-8897
                   CVE-2017-5754  

Reference:         ASB-2018.0209
                   ASB-2018.0101
                   ESB-2018.2007
                   ESB-2018.1663
                   ESB-2018.1423

Original Bulletin: 
   https://www.suse.com/support/update/announcement/2018/suse-su-20183230-1/

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   SUSE Security Update: Security update for xen
______________________________________________________________________________

Announcement ID:    SUSE-SU-2018:3230-1
Rating:             important
References:         #1027519 #1086039 #1089152 #1089635 #1090820 
                    #1090822 #1090823 
Cross-References:   CVE-2017-5754 CVE-2018-10471 CVE-2018-10472
                    CVE-2018-8897
Affected Products:
                    SUSE Linux Enterprise Server 12-SP2-BCL
______________________________________________________________________________

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

Description:

   This update for xen fixes several issues.

   These security issues were fixed:

   - CVE-2018-8897: Prevent mishandling of debug exceptions on x86 (XSA-260,
     bsc#1090820)
   - Handle HPET timers in IO-APIC mode correctly to prevent malicious or
     buggy HVM guests from causing a hypervisor crash or potentially
     privilege escalation/information leaks (XSA-261, bsc#1090822)
   - Prevent unbounded loop, induced by qemu allowing an attacker to
     permanently keep a physical CPU core busy (XSA-262, bsc#1090823)
   - CVE-2018-10472: x86 HVM guest OS users (in certain configurations) were
     able to read arbitrary dom0 files via QMP live insertion of a CDROM, in
     conjunction with specifying the target file as the backing file of a
     snapshot (bsc#1089152).
   - CVE-2018-10471: x86 PV guest OS users were able to cause a denial of
     service (out-of-bounds zero write and hypervisor crash) via unexpected
     INT 80 processing, because of an incorrect fix for CVE-2017-5754
     (bsc#1089635).

   These non-security issues were fixed:

   - bsc#1086039: Ensure that Dom0 does represent DomU cpu flags correctly
   - bsc#1027519: Fixed shadow mode guests


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-2018-841=1



Package List:

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

      xen-4.7.5_02-43.30.1
      xen-debugsource-4.7.5_02-43.30.1
      xen-doc-html-4.7.5_02-43.30.1
      xen-libs-32bit-4.7.5_02-43.30.1
      xen-libs-4.7.5_02-43.30.1
      xen-libs-debuginfo-32bit-4.7.5_02-43.30.1
      xen-libs-debuginfo-4.7.5_02-43.30.1
      xen-tools-4.7.5_02-43.30.1
      xen-tools-debuginfo-4.7.5_02-43.30.1
      xen-tools-domU-4.7.5_02-43.30.1
      xen-tools-domU-debuginfo-4.7.5_02-43.30.1


References:

   https://www.suse.com/security/cve/CVE-2017-5754.html
   https://www.suse.com/security/cve/CVE-2018-10471.html
   https://www.suse.com/security/cve/CVE-2018-10472.html
   https://www.suse.com/security/cve/CVE-2018-8897.html
   https://bugzilla.suse.com/1027519
   https://bugzilla.suse.com/1086039
   https://bugzilla.suse.com/1089152
   https://bugzilla.suse.com/1089635
   https://bugzilla.suse.com/1090820
   https://bugzilla.suse.com/1090822
   https://bugzilla.suse.com/1090823

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