SUSE-SU-2018:2352-1: important: Security update for the Linux Kernel (Live Patch 26 for SLE 12)

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

   SUSE Security Update: Security update for the Linux Kernel (Live Patch 26 for SLE 12)
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Announcement ID:    SUSE-SU-2018:2352-1
Rating:             important
References:         #1096564 #1097108 #1099306 
Cross-References:   CVE-2017-11600 CVE-2018-10853 CVE-2018-3646
                   
Affected Products:
                    SUSE Linux Enterprise Server 12-LTSS
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   An update that fixes three vulnerabilities is now available.

Description:

   This update for the Linux Kernel 3.12.61-52_89 fixes several issues.

   The following security issues were fixed:

   - CVE-2018-3646: Local attackers in virtualized guest systems could use
     speculative code patterns on hyperthreaded processors to read data
     present in the L1 Datacache used by other hyperthreads on the same CPU
     core, potentially leaking sensitive data, even from other virtual
     machines or the host system (bsc#1099306).
   - CVE-2017-11600: net/xfrm/xfrm_policy.c did not ensure that the dir value
     of xfrm_userpolicy_id is XFRM_POLICY_MAX or less, which allowed local
     users to cause a denial of service (out-of-bounds access) or possibly
     have unspecified other impact via an XFRM_MSG_MIGRATE xfrm Netlink
     message (bsc#1096564)
   - CVE-2018-10853: A flaw was found in kvm. In which certain instructions
     such as sgdt/sidt call segmented_write_std didn't propagate access
     correctly. As such, during userspace induced exception, the guest can
     incorrectly assume that the exception happened in the kernel and panic.
     (bsc#1097108).


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-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-2018-1588=1



Package List:

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

      kgraft-patch-3_12_61-52_89-default-11-2.1
      kgraft-patch-3_12_61-52_89-xen-11-2.1


References:

   https://www.suse.com/security/cve/CVE-2017-11600.html
   https://www.suse.com/security/cve/CVE-2018-10853.html
   https://www.suse.com/security/cve/CVE-2018-3646.html
   https://bugzilla.suse.com/1096564
   https://bugzilla.suse.com/1097108
   https://bugzilla.suse.com/1099306