SUSE-SU-2018:3787-1: important: Security update for the Linux Kernel (Live Patch 17 for SLE 12 SP2)

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

   SUSE Security Update: Security update for the Linux Kernel (Live Patch 17 for SLE 12 SP2)
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Announcement ID:    SUSE-SU-2018:3787-1
Rating:             important
References:         #1103098 #1112039 
Cross-References:   CVE-2018-18386 CVE-2018-5391
Affected Products:
                    SUSE Linux Enterprise Server for SAP 12-SP2
                    SUSE Linux Enterprise Server 12-SP2-LTSS
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   An update that fixes two vulnerabilities is now available.

Description:

   This update for the Linux Kernel 4.4.103-92_56 fixes several issues.

   The following security issues were fixed:

   - CVE-2018-5391: Fixed a denial of service attack with low rates of
     specially modified packets targeting IP fragment re-assembly. An
     attacker may have caused a denial of service condition by sending
     specially crafted IP fragments. The current vulnerability
     (CVE-2018-5391) became exploitable in the Linux kernel with the increase
     of the IP fragment reassembly queue size (bsc#1103098).
   - CVE-2018-18386: The drivers/tty/n_tty.c allowed local attackers (who are
     able to access pseudo terminals) to hang/block further usage of any
     pseudo terminal devices due to an EXTPROC versus ICANON confusion in
     TIOCINQ (bsc#1112039).


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-SP2-2018-2694=1 SUSE-SLE-SAP-12-SP2-2018-2695=1 SUSE-SLE-SAP-12-SP2-2018-2696=1

   - SUSE Linux Enterprise Server 12-SP2-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-SP2-2018-2694=1 SUSE-SLE-SERVER-12-SP2-2018-2695=1 SUSE-SLE-SERVER-12-SP2-2018-2696=1



Package List:

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

      kgraft-patch-4_4_103-92_53-default-11-2.1
      kgraft-patch-4_4_103-92_56-default-11-2.1
      kgraft-patch-4_4_90-92_50-default-12-2.1

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

      kgraft-patch-4_4_103-92_53-default-11-2.1
      kgraft-patch-4_4_103-92_56-default-11-2.1
      kgraft-patch-4_4_90-92_50-default-12-2.1


References:

   https://www.suse.com/security/cve/CVE-2018-18386.html
   https://www.suse.com/security/cve/CVE-2018-5391.html
   https://bugzilla.suse.com/1103098
   https://bugzilla.suse.com/1112039