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SUSE Linux Kernel Live Patch 25: Important Security Update for SLE 12 SP5

suse
Calendar Grey December 14, 2021
Dist Suse Esm H88
Addresses critical vulnerabilities in SUSE Linux Kernel (SLE 12 SP5) with vital update guidelines provided.
An update that fixes three vulnerabilities is now available

Summary

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:

References

#1191813 #1192042 #1192048

Cross- CVE-2021-0935 CVE-2021-0941 CVE-2021-20322

CVSS scores:

CVE-2021-0935 (SUSE): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2021-0941 (SUSE): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVE-2021-20322 (SUSE): 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected Products:

SUSE Linux Enterprise Live Patching 12-SP5

https://www.suse.com/security/cve/CVE-2021-0935.html

https://www.suse.com/security/cve/CVE-2021-0941.html

https://www.suse.com/security/cve/CVE-2021-20322.html

https://bugzilla.suse.com/1191813

https://bugzilla.suse.com/1192042

https://bugzilla.suse.com/1192048

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2021:4021-1
Rating: important

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