SUSE Security Update: Security update for the Linux Kernel (Live Patch 33 for SLE 12)
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Announcement ID:    SUSE-SU-2019:0645-1
Rating:             important
References:         #1103098 #1124734 #1128378 
Cross-References:   CVE-2018-5391 CVE-2019-7221 CVE-2019-9213
                   
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_125 fixes several issues.

   The following security issues were fixed:

   - CVE-2019-9213: Expand_downwards in mm/mmap.c lacked a check for the mmap
     minimum address, which made it easier for attackers to exploit kernel
     NULL pointer dereferences on non-SMAP platforms. This is related to a
     capability check for the wrong task (bsc#1128378).
   - CVE-2019-7221: Fixed a user-after-free vulnerability in the KVM
     hypervisor related to the emulation of a preemption timer, allowing an
     guest user/process to crash the host kernel. (bsc#1124734).
   - CVE-2018-5391: The Linux kernel was vulnerable to a denial of service
     attack with low rates of specially modified packets targeting IP
     fragment re-assembly. An attacker might have caused a denial of service
     condition by sending specially crafted IP fragments. Various
     vulnerabilities in IP fragmentation have been discovered and fixed over
     the years. The current vulnerability (CVE-2018-5391) became exploitable
     in the Linux kernel with the increase of the IP fragment reassembly
     queue size (bsc#1103098).


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-12-2019-645=1 SUSE-SLE-SERVER-12-2019-646=1 SUSE-SLE-SERVER-12-2019-647=1 SUSE-SLE-SERVER-12-2019-648=1 SUSE-SLE-SERVER-12-2019-649=1 SUSE-SLE-SERVER-12-2019-650=1



Package List:

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

      kgraft-patch-3_12_61-52_125-default-12-2.1
      kgraft-patch-3_12_61-52_125-xen-12-2.1
      kgraft-patch-3_12_61-52_128-default-10-2.1
      kgraft-patch-3_12_61-52_128-xen-10-2.1
      kgraft-patch-3_12_61-52_133-default-9-2.1
      kgraft-patch-3_12_61-52_133-xen-9-2.1
      kgraft-patch-3_12_61-52_136-default-9-2.1
      kgraft-patch-3_12_61-52_136-xen-9-2.1
      kgraft-patch-3_12_61-52_141-default-8-2.1
      kgraft-patch-3_12_61-52_141-xen-8-2.1
      kgraft-patch-3_12_61-52_146-default-6-2.1
      kgraft-patch-3_12_61-52_146-xen-6-2.1


References:

   https://www.suse.com/security/cve/CVE-2018-5391.html
   https://www.suse.com/security/cve/CVE-2019-7221.html
   https://www.suse.com/security/cve/CVE-2019-9213.html
   https://bugzilla.suse.com/1103098
   https://bugzilla.suse.com/1124734
   https://bugzilla.suse.com/1128378

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