SUSE Security Update: Security update for the Linux Kernel (Live Patch 32 for SLE 12 SP1)
______________________________________________________________________________

Announcement ID:    SUSE-SU-2019:1668-1
Rating:             important
References:         #1133191 #1136446 #1137597 
Cross-References:   CVE-2019-11477 CVE-2019-11478 CVE-2019-11487
                    CVE-2019-3846
Affected Products:
                    SUSE Linux Enterprise Server for SAP 12-SP1
                    SUSE Linux Enterprise Server 12-SP1-LTSS
                    SUSE Linux Enterprise Server 12-LTSS
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   An update that fixes four vulnerabilities is now available.

Description:

   This update for the Linux Kernel 3.12.74-60_64_107 fixes several issues.

   The following security issues were fixed:

   - CVE-2019-3846: A flaw that allowed an attacker to corrupt memory and
     possibly escalate privileges was found in the mwifiex kernel module
     while connecting to a malicious wireless network (bsc#1136446).
   - CVE-2019-11477: A sequence of SACKs may have been crafted by a remote
     attacker such that one can trigger an integer overflow, leading to a
     kernel panic. (bsc#1137586).
   - CVE-2019-11478: It was possible to send a crafted sequence of SACKs
     which would fragment the TCP retransmission queue. A remote attacker may
     have been able to further exploit the fragmented queue to cause an
     expensive linked-list walk for subsequent SACKs received for that same
     TCP connection. (bsc#1137586)
   - 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).


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-SP1:

      zypper in -t patch SUSE-SLE-SAP-12-SP1-2019-1650=1 SUSE-SLE-SAP-12-SP1-2019-1651=1 SUSE-SLE-SAP-12-SP1-2019-1652=1 SUSE-SLE-SAP-12-SP1-2019-1664=1 SUSE-SLE-SAP-12-SP1-2019-1668=1

   - SUSE Linux Enterprise Server 12-SP1-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-SP1-2019-1650=1 SUSE-SLE-SERVER-12-SP1-2019-1651=1 SUSE-SLE-SERVER-12-SP1-2019-1652=1 SUSE-SLE-SERVER-12-SP1-2019-1664=1 SUSE-SLE-SERVER-12-SP1-2019-1668=1

   - SUSE Linux Enterprise Server 12-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-2019-1665=1 SUSE-SLE-SERVER-12-2019-1667=1 SUSE-SLE-SERVER-12-2019-1680=1 SUSE-SLE-SERVER-12-2019-1681=1



Package List:

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

      kgraft-patch-3_12_74-60_64_104-default-7-2.1
      kgraft-patch-3_12_74-60_64_104-xen-7-2.1
      kgraft-patch-3_12_74-60_64_107-default-7-2.1
      kgraft-patch-3_12_74-60_64_107-xen-7-2.1
      kgraft-patch-3_12_74-60_64_110-default-3-2.1
      kgraft-patch-3_12_74-60_64_110-xen-3-2.1
      kgraft-patch-3_12_74-60_64_96-default-11-2.1
      kgraft-patch-3_12_74-60_64_96-xen-11-2.1
      kgraft-patch-3_12_74-60_64_99-default-9-2.1
      kgraft-patch-3_12_74-60_64_99-xen-9-2.1

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

      kgraft-patch-3_12_74-60_64_104-default-7-2.1
      kgraft-patch-3_12_74-60_64_104-xen-7-2.1
      kgraft-patch-3_12_74-60_64_107-default-7-2.1
      kgraft-patch-3_12_74-60_64_107-xen-7-2.1
      kgraft-patch-3_12_74-60_64_110-default-3-2.1
      kgraft-patch-3_12_74-60_64_110-xen-3-2.1
      kgraft-patch-3_12_74-60_64_96-default-11-2.1
      kgraft-patch-3_12_74-60_64_96-xen-11-2.1
      kgraft-patch-3_12_74-60_64_99-default-9-2.1
      kgraft-patch-3_12_74-60_64_99-xen-9-2.1

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

      kgraft-patch-3_12_61-52_136-default-11-2.1
      kgraft-patch-3_12_61-52_136-xen-11-2.1
      kgraft-patch-3_12_61-52_141-default-9-2.1
      kgraft-patch-3_12_61-52_141-xen-9-2.1
      kgraft-patch-3_12_61-52_146-default-7-2.1
      kgraft-patch-3_12_61-52_146-xen-7-2.1
      kgraft-patch-3_12_61-52_149-default-3-2.1
      kgraft-patch-3_12_61-52_149-xen-3-2.1


References:

   https://www.suse.com/security/cve/CVE-2019-11477.html
   https://www.suse.com/security/cve/CVE-2019-11478.html
   https://www.suse.com/security/cve/CVE-2019-11487.html
   https://www.suse.com/security/cve/CVE-2019-3846.html
   https://bugzilla.suse.com/1133191
   https://bugzilla.suse.com/1136446
   https://bugzilla.suse.com/1137597

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