Security update for the Linux Kernel (Live Patch 31 for SLE 12 SP1)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 31 for SLE 12 SP1)
Announcement ID: SUSE-SU-2019:1924-1
Rating: important
References: #1137597 #1140747
Cross-References: CVE-2019-11477 CVE-2019-11478
Affected Products:
  • SUSE Linux Enterprise Server for SAP 12-SP1
  • SUSE Linux Enterprise Server 12-SP1-LTSS

An update that fixes two vulnerabilities is now available.

Description:

This update for the Linux Kernel 3.12.74-60_64_104 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 Server for SAP 12-SP1:
    zypper in -t patch SUSE-SLE-SAP-12-SP1-2019-1923=1 SUSE-SLE-SAP-12-SP1-2019-1924=1 SUSE-SLE-SAP-12-SP1-2019-1925=1 SUSE-SLE-SAP-12-SP1-2019-1926=1
  • SUSE Linux Enterprise Server 12-SP1-LTSS:
    zypper in -t patch SUSE-SLE-SERVER-12-SP1-2019-1923=1 SUSE-SLE-SERVER-12-SP1-2019-1924=1 SUSE-SLE-SERVER-12-SP1-2019-1925=1 SUSE-SLE-SERVER-12-SP1-2019-1926=1

Package List:

  • SUSE Linux Enterprise Server for SAP 12-SP1 (x86_64):
    • kgraft-patch-3_12_74-60_64_104-default-8-2.1
    • kgraft-patch-3_12_74-60_64_104-xen-8-2.1
    • kgraft-patch-3_12_74-60_64_107-default-8-2.1
    • kgraft-patch-3_12_74-60_64_107-xen-8-2.1
    • kgraft-patch-3_12_74-60_64_110-default-4-2.1
    • kgraft-patch-3_12_74-60_64_110-xen-4-2.1
    • kgraft-patch-3_12_74-60_64_99-default-10-2.1
    • kgraft-patch-3_12_74-60_64_99-xen-10-2.1
  • SUSE Linux Enterprise Server 12-SP1-LTSS (x86_64):
    • kgraft-patch-3_12_74-60_64_104-default-8-2.1
    • kgraft-patch-3_12_74-60_64_104-xen-8-2.1
    • kgraft-patch-3_12_74-60_64_107-default-8-2.1
    • kgraft-patch-3_12_74-60_64_107-xen-8-2.1
    • kgraft-patch-3_12_74-60_64_110-default-4-2.1
    • kgraft-patch-3_12_74-60_64_110-xen-4-2.1
    • kgraft-patch-3_12_74-60_64_99-default-10-2.1
    • kgraft-patch-3_12_74-60_64_99-xen-10-2.1

References: