SUSE-SU-2019:0891-1: important: Security update for xen

Fri Apr 5 13:22:09 MDT 2019

   SUSE Security Update: Security update for xen
______________________________________________________________________________

Announcement ID:    SUSE-SU-2019:0891-1
Rating:             important
References:         #1026236 #1027519 #1069468 #1119161 #1120067 
                    #1123157 #1126140 #1126141 #1126192 #1126195 
                    #1126196 #1126197 #1126198 #1126201 #1126325 
                    #1127400 #1127620 #1129623 
Cross-References:   CVE-2019-6778 CVE-2019-9824
Affected Products:
                    SUSE Linux Enterprise Software Development Kit 12-SP4
                    SUSE Linux Enterprise Server 12-SP4
                    SUSE Linux Enterprise Desktop 12-SP4
______________________________________________________________________________

   An update that solves two vulnerabilities and has 16 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 malicious or buggy x86 PV guest kernels
     to mount a Denial of Service attack affecting the whole system
     (bsc#1126197).
   - 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).
   - 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).
   - 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).

   Other issues addressed:

   - Upstream bug fixes (bsc#1027519)
   - Packages should no longer use /var/adm/fillup-templates (bsc#1069468).
   - Added Xen cmdline option "suse_vtsc_tolerance" to avoid TSC emulation
     for HVM domUs (bsc#1026236).
   - Fixed an issue where setup of grant_tables and other variables may fail
     (bsc#1126325).
   - Fixed a building issue (bsc#1119161).
   - Added a requirement for xen, xl.cfg firmware="pvgrub32|pvgrub64
     (bsc#1127620).
   - Fixed a segmetation fault in Libvirt when crash triggered on top of HVM
     guest (bsc#1120067).

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-SP4:

      zypper in -t patch SUSE-SLE-SDK-12-SP4-2019-891=1

   - SUSE Linux Enterprise Server 12-SP4:

      zypper in -t patch SUSE-SLE-SERVER-12-SP4-2019-891=1

   - SUSE Linux Enterprise Desktop 12-SP4:

      zypper in -t patch SUSE-SLE-DESKTOP-12-SP4-2019-891=1

Package List:

   - SUSE Linux Enterprise Software Development Kit 12-SP4 (aarch64 x86_64):

      xen-debugsource-4.11.1_04-2.6.1
      xen-devel-4.11.1_04-2.6.1

   - SUSE Linux Enterprise Server 12-SP4 (x86_64):

      xen-4.11.1_04-2.6.1
      xen-debugsource-4.11.1_04-2.6.1
      xen-doc-html-4.11.1_04-2.6.1
      xen-libs-32bit-4.11.1_04-2.6.1
      xen-libs-4.11.1_04-2.6.1
      xen-libs-debuginfo-32bit-4.11.1_04-2.6.1
      xen-libs-debuginfo-4.11.1_04-2.6.1
      xen-tools-4.11.1_04-2.6.1
      xen-tools-debuginfo-4.11.1_04-2.6.1
      xen-tools-domU-4.11.1_04-2.6.1
      xen-tools-domU-debuginfo-4.11.1_04-2.6.1

   - SUSE Linux Enterprise Desktop 12-SP4 (x86_64):

      xen-4.11.1_04-2.6.1
      xen-debugsource-4.11.1_04-2.6.1
      xen-libs-32bit-4.11.1_04-2.6.1
      xen-libs-4.11.1_04-2.6.1
      xen-libs-debuginfo-32bit-4.11.1_04-2.6.1
      xen-libs-debuginfo-4.11.1_04-2.6.1

References:

   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/1027519
   https://bugzilla.suse.com/1069468
   https://bugzilla.suse.com/1119161
   https://bugzilla.suse.com/1120067
   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/1126197
   https://bugzilla.suse.com/1126198
   https://bugzilla.suse.com/1126201
   https://bugzilla.suse.com/1126325
   https://bugzilla.suse.com/1127400
   https://bugzilla.suse.com/1127620
   https://bugzilla.suse.com/1129623