Security update for the Linux Kernel (Live Patch 25 for SLE 12 SP5)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 25 for SLE 12 SP5)
Announcement ID: SUSE-SU-2021:4021-1
Rating: important
References: #1191813 #1192042 #1192048
Cross-References:CVE-2021-0935 CVE-2021-0941 CVE-2021-20322
Affected Products:
  • SUSE Linux Enterprise Live Patching 12-SP5

An update that fixes three vulnerabilities is now available.

Description:

This update for the Linux Kernel 4.12.14-122_98 fixes several issues.
The following security issues were fixed:

  • CVE-2021-0941: In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation (bnc#1192045).
  • CVE-2021-20322: Make the ipv4 and ipv6 ICMP exception caches less predictive to avoid information leaks about UDP ports in use. (bsc#1191790)
  • CVE-2021-0935: In ip6_xmit of ip6_output.c, there is a possible out of bounds write due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. (bsc#1192032)

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 Live Patching 12-SP5:
    zypper in -t patch SUSE-SLE-Live-Patching-12-SP5-2021-4021=1

Package List:

  • SUSE Linux Enterprise Live Patching 12-SP5 (ppc64le s390x x86_64):
    • kgraft-patch-4_12_14-122_98-default-2-2.1

References: