SUSE Security Update: Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP1)
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Announcement ID:    SUSE-SU-2019:1889-1
Rating:             important
References:         #1137597 #1140747 
Cross-References:   CVE-2019-11477 CVE-2019-11478
Affected Products:
                    SUSE Linux Enterprise Module for Live Patching 15-SP1
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   An update that fixes two vulnerabilities is now available.

Description:

   This update for the Linux Kernel 4.12.14-195 fixes several issues.

   The following security issues were fixed:

   - CVE-2019-11477: Jonathan Looney discovered that the
     TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow
     when handling TCP Selective Acknowledgments (SACKs). A remote attacker
     could use this to cause a denial of service. (bsc#1137586)
   - CVE-2019-11478: Jonathan Looney discovered that the TCP retransmission
     queue implementation in tcp_fragment could be fragmented when handling
     certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker
     could use this to cause a denial of service. (bsc#1137586)

   This update contains a regression fix for CVE-2019-11477 and
   CVE-2019-11478 (bsc#1140747).


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 Module for Live Patching 15-SP1:

      zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP1-2019-1889=1



Package List:

   - SUSE Linux Enterprise Module for Live Patching 15-SP1 (ppc64le x86_64):

      kernel-livepatch-4_12_14-195-default-4-10.1


References:

   https://www.suse.com/security/cve/CVE-2019-11477.html
   https://www.suse.com/security/cve/CVE-2019-11478.html
   https://bugzilla.suse.com/1137597
   https://bugzilla.suse.com/1140747

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