Security update for the Linux Kernel (Live Patch 17 for SLE 12 SP2)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 17 for SLE 12 SP2)
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

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: