ESB-2018.3318 - [SUSE] xen: Multiple vulnerabilities 2018-10-29

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

                               ESB-2018.3318
               SUSE Security Update: Security update for xen
                              29 October 2018

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

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

Product:           xen
Publisher:         SUSE
Operating System:  SUSE
Impact/Access:     Denial of Service        -- Remote/Unauthenticated
                   Reduced Security         -- Remote/Unauthenticated
                   Access Confidential Data -- Existing Account      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-17963 CVE-2018-15470 CVE-2018-15469
                   CVE-2018-15468 CVE-2018-3646 

Reference:         ASB-2018.0204
                   ESB-2018.3039
                   ESB-2018.3020
                   ESB-2018.2770
                   ESB-2018.2665
                   ESB-2018.2612
                   ESB-2018.2561

Original Bulletin: 
   https://www.suse.com/ja-jp/support/update/announcement/2018/suse-su-20183490-1/

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   SUSE Security Update: Security update for xen
______________________________________________________________________________

Announcement ID:    SUSE-SU-2018:3490-1
Rating:             important
References:         #1027519 #1078292 #1091107 #1094508 #1103275 
                    #1103276 #1103279 #1106263 #1111014 
Cross-References:   CVE-2018-15468 CVE-2018-15469 CVE-2018-15470
                    CVE-2018-17963 CVE-2018-3646
Affected Products:
                    SUSE Linux Enterprise Software Development Kit 12-SP3
                    SUSE Linux Enterprise Server 12-SP3
                    SUSE Linux Enterprise Desktop 12-SP3
                    SUSE CaaS Platform ALL
                    SUSE CaaS Platform 3.0
______________________________________________________________________________

   An update that solves 5 vulnerabilities and has four fixes
   is now available.

Description:

   This update for xen fixes the following issues:

   XEN was updated to the Xen 4.9.3 bug fix only release (bsc#1027519)

   - CVE-2018-17963: qemu_deliver_packet_iov accepted packet sizes greater
     than INT_MAX, which allows attackers to cause a denial of service or
     possibly have unspecified other impact. (bsc#1111014)
   - CVE-2018-15470: oxenstored might not have enforced the configured
     quota-maxentity. This allowed a malicious or buggy guest to write as
     many xenstore entries as it wishes, causing unbounded memory usage in
     oxenstored. This can lead to a system-wide DoS.  (XSA-272) (bsc#1103279)
   - CVE-2018-15469: ARM never properly implemented grant table v2, either in
     the hypervisor or in Linux. Unfortunately, an ARM guest can still
     request v2 grant tables; they will simply not be properly set up,
     resulting in subsequent grant-related hypercalls hitting BUG() checks.
     An unprivileged guest can cause a BUG() check in the hypervisor,
     resulting in a denial-of-service (crash). (XSA-268) (bsc#1103275) Note
     that SUSE does not ship ARM Xen, so we are not affected.
   - CVE-2018-15468: The DEBUGCTL MSR contains several debugging features,
     some of which virtualise cleanly, but some do not. In particular, Branch
     Trace Store is not virtualised by the processor, and software has to be
     careful to configure it suitably not to lock up the core. As a result,
     it must only be available to fully trusted guests. Unfortunately, in the
     case that vPMU is disabled, all value checking was skipped, allowing the
     guest to choose any MSR_DEBUGCTL setting it likes. A malicious or buggy
     guest administrator (on Intel x86 HVM or PVH) can lock up the entire
     host, causing a Denial of Service. (XSA-269) (bsc#1103276)
   - CVE-2018-3646: Systems with microprocessors utilizing speculative
     execution and address translations may have allowed unauthorized
     disclosure of information residing in the L1 data cache to an attacker
     with local user access with guest OS privilege via a terminal page fault
     and a side-channel analysis. (XSA-273) (bsc#1091107)

   Non security issues fixed:

   - The affinity reporting via 'xl vcpu-list' was broken (bsc#1106263)
   - Kernel oops in 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 Software Development Kit 12-SP3:

      zypper in -t patch SUSE-SLE-SDK-12-SP3-2018-2492=1

   - SUSE Linux Enterprise Server 12-SP3:

      zypper in -t patch SUSE-SLE-SERVER-12-SP3-2018-2492=1

   - SUSE Linux Enterprise Desktop 12-SP3:

      zypper in -t patch SUSE-SLE-DESKTOP-12-SP3-2018-2492=1

   - SUSE CaaS Platform ALL:

      To install this update, use the SUSE CaaS Platform Velum dashboard.
      It will inform you if it detects new updates and let you then trigger
      updating of the complete cluster in a controlled way.

   - SUSE CaaS Platform 3.0:

      To install this update, use the SUSE CaaS Platform Velum dashboard.
      It will inform you if it detects new updates and let you then trigger
      updating of the complete cluster in a controlled way.



Package List:

   - SUSE Linux Enterprise Software Development Kit 12-SP3 (aarch64 x86_64):

      xen-debugsource-4.9.3_03-3.44.2
      xen-devel-4.9.3_03-3.44.2

   - SUSE Linux Enterprise Server 12-SP3 (x86_64):

      xen-4.9.3_03-3.44.2
      xen-debugsource-4.9.3_03-3.44.2
      xen-doc-html-4.9.3_03-3.44.2
      xen-libs-32bit-4.9.3_03-3.44.2
      xen-libs-4.9.3_03-3.44.2
      xen-libs-debuginfo-32bit-4.9.3_03-3.44.2
      xen-libs-debuginfo-4.9.3_03-3.44.2
      xen-tools-4.9.3_03-3.44.2
      xen-tools-debuginfo-4.9.3_03-3.44.2
      xen-tools-domU-4.9.3_03-3.44.2
      xen-tools-domU-debuginfo-4.9.3_03-3.44.2

   - SUSE Linux Enterprise Desktop 12-SP3 (x86_64):

      xen-4.9.3_03-3.44.2
      xen-debugsource-4.9.3_03-3.44.2
      xen-libs-32bit-4.9.3_03-3.44.2
      xen-libs-4.9.3_03-3.44.2
      xen-libs-debuginfo-32bit-4.9.3_03-3.44.2
      xen-libs-debuginfo-4.9.3_03-3.44.2

   - SUSE CaaS Platform ALL (x86_64):

      xen-debugsource-4.9.3_03-3.44.2
      xen-libs-4.9.3_03-3.44.2
      xen-libs-debuginfo-4.9.3_03-3.44.2
      xen-tools-domU-4.9.3_03-3.44.2
      xen-tools-domU-debuginfo-4.9.3_03-3.44.2

   - SUSE CaaS Platform 3.0 (x86_64):

      xen-debugsource-4.9.3_03-3.44.2
      xen-libs-4.9.3_03-3.44.2
      xen-libs-debuginfo-4.9.3_03-3.44.2
      xen-tools-domU-4.9.3_03-3.44.2
      xen-tools-domU-debuginfo-4.9.3_03-3.44.2


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-2018-17963.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/1106263
   https://bugzilla.suse.com/1111014

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