ESB-2019.0030 - [SUSE] xen: Multiple vulnerabilities - 2019-01-02


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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.0030
               SUSE Security Update: Security update for xen
                              2 January 2019

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

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

Product:           xen
Publisher:         SUSE
Operating System:  SUSE
Impact/Access:     Increased Privileges   -- Existing Account
                   Access Privileged Data -- Existing Account
                   Denial of Service      -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-19966 CVE-2018-19965 CVE-2018-19962
                   CVE-2018-19961 CVE-2018-18883 CVE-2018-15470
                   CVE-2018-15469 CVE-2018-15468 CVE-2018-3646

Reference:         ASB-2018.0204
                   ESB-2018.3934
                   ESB-2018.2344
                   ESB-2018.2343

Original Bulletin: 
   https://www.suse.com/support/update/announcement/2018/suse-su-20184300-1/

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   SUSE Security Update: Security update for xen
______________________________________________________________________________

Announcement ID:    SUSE-SU-2018:4300-1
Rating:             important
References:         #1027519 #1078292 #1091107 #1094508 #1103275 
                    #1103276 #1103279 #1105528 #1108940 #1114405 
                    #1115040 #1115045 #1115047 
Cross-References:   CVE-2018-15468 CVE-2018-15469 CVE-2018-15470
                    CVE-2018-18883 CVE-2018-19961 CVE-2018-19962
                    CVE-2018-19965 CVE-2018-19966 CVE-2018-3646
                   
Affected Products:
                    SUSE Linux Enterprise Module for Server Applications 15
                    SUSE Linux Enterprise Module for Basesystem 15
______________________________________________________________________________

   An update that solves 9 vulnerabilities and has four fixes
   is now available.

Description:

   This update for xen fixes the following issues:

   Update to Xen 4.10.2 bug fix release (bsc#1027519).

   Security vulnerabilities fixed:

   - CVE-2018-19961, CVE-2018-19962: Fixed an issue related to insufficient
     TLB flushing with AMD IOMMUs, which potentially allowed a guest to
     escalate its privileges, may cause a Denial of Service (DoS) affecting
     the entire host, or may be able to access data it is not supposed to
     access. (XSA-275) (bsc#1115040)
   - CVE-2018-19965: Fixed an issue related to the INVPCID instruction in
     case non-canonical addresses are accessed, which may allow a guest to
     cause Xen to crash, resulting in a Denial of Service (DoS) affecting the
     entire host. (XSA-279) (bsc#1115045)
   - CVE-2018-19966: Fixed an issue related to a previous fix for XSA-240,
     which conflicted with shadow paging and allowed a guest to cause Xen to
     crash, resulting in a Denial of Service (DoS). (XSA-280) (bsc#1115047)
   - CVE-2018-18883: Fixed an issue related to inproper restriction of nested
     VT-x, which allowed a guest to cause Xen to crash, resulting in a Denial
     of Service (DoS). (XSA-278) (bsc#1114405)
   - CVE-2018-15468: Fixed incorrect MSR_DEBUGCTL handling, which allowed
     guests to enable Branch Trace Store and may cause a Denial of Service
     (DoS) of the entire host. (XSA-269) (bsc#1103276)
   - CVE-2018-15469: Fixed use of v2 grant tables on ARM, which were not
     properly implemented and may cause a Denial of Service (DoS). (XSA-268)
     (bsc#1103275)
   - CVE-2018-15470: Fixed an issue in the logic in oxenstored for handling
     writes, which allowed a guest to write memory unbounded leading to
     system-wide Denial
     of Service (DoS). (XSA-272) (bsc#1103279)
   - CVE-2018-3646: Mitigations for VMM aspects of L1 Terminal Fault
     (XSA-273) (bsc#1091107)

   Other bugs fixed:

   - Fixed an issue related to a domU hang on SLE12-SP3 HV (bsc#1108940)
   - Fixed an issue with xpti=no-dom0 not working as expected (bsc#1105528)
   - Fixed a kernel oops related to fs/dcache.c called by
     d_materialise_unique() (bsc#1094508)


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:

      zypper in -t patch SUSE-SLE-Module-Server-Applications-15-2018-3063=1

   - SUSE Linux Enterprise Module for Basesystem 15:

      zypper in -t patch SUSE-SLE-Module-Basesystem-15-2018-3063=1



Package List:

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

      xen-4.10.2_04-3.9.1
      xen-debugsource-4.10.2_04-3.9.1
      xen-devel-4.10.2_04-3.9.1
      xen-tools-4.10.2_04-3.9.1
      xen-tools-debuginfo-4.10.2_04-3.9.1

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

      xen-debugsource-4.10.2_04-3.9.1
      xen-libs-4.10.2_04-3.9.1
      xen-libs-debuginfo-4.10.2_04-3.9.1
      xen-tools-domU-4.10.2_04-3.9.1
      xen-tools-domU-debuginfo-4.10.2_04-3.9.1


References:

   https://www.suse.com/security/cve/CVE-2018-15468.html
   https://www.suse.com/security/cve/CVE-2018-15469.html
   https://www.suse.com/security/cve/CVE-2018-15470.html
   https://www.suse.com/security/cve/CVE-2018-18883.html
   https://www.suse.com/security/cve/CVE-2018-19961.html
   https://www.suse.com/security/cve/CVE-2018-19962.html
   https://www.suse.com/security/cve/CVE-2018-19965.html
   https://www.suse.com/security/cve/CVE-2018-19966.html
   https://www.suse.com/security/cve/CVE-2018-3646.html
   https://bugzilla.suse.com/1027519
   https://bugzilla.suse.com/1078292
   https://bugzilla.suse.com/1091107
   https://bugzilla.suse.com/1094508
   https://bugzilla.suse.com/1103275
   https://bugzilla.suse.com/1103276
   https://bugzilla.suse.com/1103279
   https://bugzilla.suse.com/1105528
   https://bugzilla.suse.com/1108940
   https://bugzilla.suse.com/1114405
   https://bugzilla.suse.com/1115040
   https://bugzilla.suse.com/1115045
   https://bugzilla.suse.com/1115047

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