SUSE Security Update: Security update for the Linux Kernel (Live Patch 34 for SLE 12 SP1)
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Announcement ID:    SUSE-SU-2019:1767-1
Rating:             important
References:         #1102682 #1133191 
Cross-References:   CVE-2018-5390 CVE-2019-11487
Affected Products:
                    SUSE Linux Enterprise Server for SAP 12-SP2
                    SUSE Linux Enterprise Server for SAP 12-SP1
                    SUSE Linux Enterprise Server 12-SP2-LTSS
                    SUSE Linux Enterprise Server 12-SP1-LTSS
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   An update that fixes two vulnerabilities is now available.

Description:

   This update for the Linux Kernel 3.12.74-60_64_115 fixes several issues.

   The following security issues were fixed:

   - CVE-2019-11487: The Linux kernel allowed page->_refcount reference count
     overflow, with resultant use-after-free issues, if about 140 GiB of RAM
     exists. This is related to fs/fuse/dev.c, fs/pipe.c, fs/splice.c,
     include/linux/mm.h, include/linux/pipe_fs_i.h, kernel/trace/trace.c,
     mm/gup.c, and mm/hugetlb.c. It can occur with FUSE requests
     (bsc#1133191).
   - CVE-2018-5390: Linux kernel could be forced to make very expensive calls
     to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming
     packet which can lead to a denial of service (bsc#1102682).


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 for SAP 12-SP2:

      zypper in -t patch SUSE-SLE-SAP-12-SP2-2019-1766=1

   - SUSE Linux Enterprise Server for SAP 12-SP1:

      zypper in -t patch SUSE-SLE-SAP-12-SP1-2019-1767=1

   - SUSE Linux Enterprise Server 12-SP2-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-2019-1766=1

   - SUSE Linux Enterprise Server 12-SP1-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-SP1-2019-1767=1



Package List:

   - SUSE Linux Enterprise Server for SAP 12-SP2 (ppc64le x86_64):

      kgraft-patch-4_4_121-92_114-default-2-2.1

   - SUSE Linux Enterprise Server for SAP 12-SP1 (x86_64):

      kgraft-patch-3_12_74-60_64_115-default-2-2.1
      kgraft-patch-3_12_74-60_64_115-xen-2-2.1

   - SUSE Linux Enterprise Server 12-SP2-LTSS (ppc64le x86_64):

      kgraft-patch-4_4_121-92_114-default-2-2.1

   - SUSE Linux Enterprise Server 12-SP1-LTSS (x86_64):

      kgraft-patch-3_12_74-60_64_115-default-2-2.1
      kgraft-patch-3_12_74-60_64_115-xen-2-2.1


References:

   https://www.suse.com/security/cve/CVE-2018-5390.html
   https://www.suse.com/security/cve/CVE-2019-11487.html
   https://bugzilla.suse.com/1102682
   https://bugzilla.suse.com/1133191

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