SUSE Security Update: Security update for xen
______________________________________________________________________________

Announcement ID:    SUSE-SU-2019:0921-1
Rating:             important
References:         #1026236 #1114988 #1123157 #1126140 #1126141 
                    #1126192 #1126195 #1126196 #1126198 #1126201 
                    #1127400 #1129623 
Cross-References:   CVE-2018-19967 CVE-2019-6778 CVE-2019-9824
                   
Affected Products:
                    SUSE OpenStack Cloud 7
                    SUSE Linux Enterprise Server for SAP 12-SP2
                    SUSE Linux Enterprise Server 12-SP2-LTSS
                    SUSE Linux Enterprise Server 12-SP2-BCL
                    SUSE Enterprise Storage 4
______________________________________________________________________________

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

Description:

   This update for xen fixes the following issues:

   Security issues fixed:

   - Fixed an issue which could allow malicious PV guests may cause a host
     crash or gain access to data pertaining to other guests.Additionally,
     vulnerable configurations are likely to be unstable even in the absence
     of an attack (bsc#1126198).
   - Fixed multiple access violations introduced by XENMEM_exchange hypercall
     which could allow a single PV guest to leak arbitrary amounts of memory,
     leading to a denial of service (bsc#1126192).
   - Fixed an issue which could allow a malicious unprivileged guest
     userspace process to escalate its privilege to that of other userspace
     processes in the same guest and potentially thereby to that
     of the guest operating system (bsc#1126201).
   - Fixed an issue which could allow a malicious or buggy x86 PV guest
     kernels can mount a Denial of Service attack affecting the whole system
     (bsc#1126196).
   - Fixed an issue which could allow an untrusted PV domain with access to a
     physical device to DMA into its own pagetables leading to privilege
     escalation (bsc#1126195).
   - CVE-2019-6778: Fixed a heap buffer overflow in tcp_emu() found in slirp
     (bsc#1123157).
   - Fixed an issue which could allow malicious 64bit PV guests to cause a
     host crash (bsc#1127400).
   - Fixed an issue which could allow malicious or buggy guests with passed
     through PCI devices to  be able to escalate their privileges, crash the
     host, or access data belonging to other guests. Additionally memory
     leaks were also possible (bsc#1126140).
   - Fixed a race condition issue which could allow malicious PV guests to
     escalate their privilege to that
     of the hypervisor (bsc#1126141).
   - CVE-2019-9824: Fixed an information leak in SLiRP networking
     implementation which could allow a user/process to read uninitialised
     stack memory contents (bsc#1129623).
   - CVE-2018-19967: Fixed HLE constructs that allowed guests to lock up the
     host, resulting in a Denial of Service (DoS). (XSA-282) (bsc#1114988)

   Other issue addressed:

   - Added Xen cmdline option "suse_vtsc_tolerance" to avoid TSC emulation
     for HVM domUs (bsc#1026236).


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 OpenStack Cloud 7:

      zypper in -t patch SUSE-OpenStack-Cloud-7-2019-921=1

   - SUSE Linux Enterprise Server for SAP 12-SP2:

      zypper in -t patch SUSE-SLE-SAP-12-SP2-2019-921=1

   - SUSE Linux Enterprise Server 12-SP2-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-2019-921=1

   - SUSE Linux Enterprise Server 12-SP2-BCL:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-BCL-2019-921=1

   - SUSE Enterprise Storage 4:

      zypper in -t patch SUSE-Storage-4-2019-921=1



Package List:

   - SUSE OpenStack Cloud 7 (x86_64):

      xen-4.7.6_06-43.48.1
      xen-debugsource-4.7.6_06-43.48.1
      xen-doc-html-4.7.6_06-43.48.1
      xen-libs-32bit-4.7.6_06-43.48.1
      xen-libs-4.7.6_06-43.48.1
      xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
      xen-libs-debuginfo-4.7.6_06-43.48.1
      xen-tools-4.7.6_06-43.48.1
      xen-tools-debuginfo-4.7.6_06-43.48.1
      xen-tools-domU-4.7.6_06-43.48.1
      xen-tools-domU-debuginfo-4.7.6_06-43.48.1

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

      xen-4.7.6_06-43.48.1
      xen-debugsource-4.7.6_06-43.48.1
      xen-doc-html-4.7.6_06-43.48.1
      xen-libs-32bit-4.7.6_06-43.48.1
      xen-libs-4.7.6_06-43.48.1
      xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
      xen-libs-debuginfo-4.7.6_06-43.48.1
      xen-tools-4.7.6_06-43.48.1
      xen-tools-debuginfo-4.7.6_06-43.48.1
      xen-tools-domU-4.7.6_06-43.48.1
      xen-tools-domU-debuginfo-4.7.6_06-43.48.1

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

      xen-4.7.6_06-43.48.1
      xen-debugsource-4.7.6_06-43.48.1
      xen-doc-html-4.7.6_06-43.48.1
      xen-libs-32bit-4.7.6_06-43.48.1
      xen-libs-4.7.6_06-43.48.1
      xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
      xen-libs-debuginfo-4.7.6_06-43.48.1
      xen-tools-4.7.6_06-43.48.1
      xen-tools-debuginfo-4.7.6_06-43.48.1
      xen-tools-domU-4.7.6_06-43.48.1
      xen-tools-domU-debuginfo-4.7.6_06-43.48.1

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

      xen-4.7.6_06-43.48.1
      xen-debugsource-4.7.6_06-43.48.1
      xen-doc-html-4.7.6_06-43.48.1
      xen-libs-32bit-4.7.6_06-43.48.1
      xen-libs-4.7.6_06-43.48.1
      xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
      xen-libs-debuginfo-4.7.6_06-43.48.1
      xen-tools-4.7.6_06-43.48.1
      xen-tools-debuginfo-4.7.6_06-43.48.1
      xen-tools-domU-4.7.6_06-43.48.1
      xen-tools-domU-debuginfo-4.7.6_06-43.48.1

   - SUSE Enterprise Storage 4 (x86_64):

      xen-4.7.6_06-43.48.1
      xen-debugsource-4.7.6_06-43.48.1
      xen-doc-html-4.7.6_06-43.48.1
      xen-libs-32bit-4.7.6_06-43.48.1
      xen-libs-4.7.6_06-43.48.1
      xen-libs-debuginfo-32bit-4.7.6_06-43.48.1
      xen-libs-debuginfo-4.7.6_06-43.48.1
      xen-tools-4.7.6_06-43.48.1
      xen-tools-debuginfo-4.7.6_06-43.48.1
      xen-tools-domU-4.7.6_06-43.48.1
      xen-tools-domU-debuginfo-4.7.6_06-43.48.1


References:

   https://www.suse.com/security/cve/CVE-2018-19967.html
   https://www.suse.com/security/cve/CVE-2019-6778.html
   https://www.suse.com/security/cve/CVE-2019-9824.html
   https://bugzilla.suse.com/1026236
   https://bugzilla.suse.com/1114988
   https://bugzilla.suse.com/1123157
   https://bugzilla.suse.com/1126140
   https://bugzilla.suse.com/1126141
   https://bugzilla.suse.com/1126192
   https://bugzilla.suse.com/1126195
   https://bugzilla.suse.com/1126196
   https://bugzilla.suse.com/1126198
   https://bugzilla.suse.com/1126201
   https://bugzilla.suse.com/1127400
   https://bugzilla.suse.com/1129623

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