SUSE-SU-2018:1362-2: important: Security update for qemu

[sle-security-updates at lists.suse.com]

   SUSE Security Update: Security update for qemu
______________________________________________________________________________

Announcement ID:    SUSE-SU-2018:1362-2
Rating:             important
References:         #1079405 #1092885 
Cross-References:   CVE-2018-3639
Affected Products:
                    SUSE Linux Enterprise Server 12-SP2-BCL
______________________________________________________________________________

   An update that solves one vulnerability and has one errata
   is now available.

Description:

   This update for qemu fixes several issues.

   This security issue was fixed:

   - CVE-2018-3639: Spectre v4 vulnerability mitigation support for KVM
     guests (bsc#1092885).

     Systems with microprocessors utilizing speculative execution and
   speculative execution of memory reads before the addresses of all prior
   memory writes are known may allow unauthorized disclosure of information
   to an attacker with local user access via a side-channel analysis.

     This patch permits the new x86 cpu feature flag named "ssbd" to be
   presented to the guest, given that the host has this feature, and KVM
   exposes it to the guest as well.

     For this feature to be enabled please use the qemu commandline
     -cpu $MODEL,+spec-ctrl,+ssbd so the guest OS can take advantage of the
      feature.

     spec-ctrl and ssbd support is also required in the host.

   This feature was added:

   - Add support for block resize support for xen disks through the monitor

   This non-security issue was fixed:

   - bsc#1079405: Add new look up path "sys/class/tpm" for tpm cancel path
     based
     on Linux 4.0 change


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-2018-946=1



Package List:

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

      qemu-ipxe-1.0.0-41.40.1
      qemu-seabios-1.9.1-41.40.1
      qemu-sgabios-8-41.40.1
      qemu-vgabios-1.9.1-41.40.1

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

      qemu-2.6.2-41.40.1
      qemu-block-curl-2.6.2-41.40.1
      qemu-block-curl-debuginfo-2.6.2-41.40.1
      qemu-block-rbd-2.6.2-41.40.1
      qemu-block-rbd-debuginfo-2.6.2-41.40.1
      qemu-block-ssh-2.6.2-41.40.1
      qemu-block-ssh-debuginfo-2.6.2-41.40.1
      qemu-debugsource-2.6.2-41.40.1
      qemu-guest-agent-2.6.2-41.40.1
      qemu-guest-agent-debuginfo-2.6.2-41.40.1
      qemu-kvm-2.6.2-41.40.1
      qemu-lang-2.6.2-41.40.1
      qemu-tools-2.6.2-41.40.1
      qemu-tools-debuginfo-2.6.2-41.40.1
      qemu-x86-2.6.2-41.40.1
      qemu-x86-debuginfo-2.6.2-41.40.1


References:

   https://www.suse.com/security/cve/CVE-2018-3639.html
   https://bugzilla.suse.com/1079405
   https://bugzilla.suse.com/1092885