SUSE Linux 12-SP5: 2021:3992-1 Important: RT Kernel Security Fixes
suse
December 10, 2021
An update that solves four vulnerabilities, contains one feature and has 15 fixes is now available
Summary
The SUSE Linux Enterprise 12 SP5 Real Time kernel was updated to receive various security and bugfixes. The following security bugs were fixed: - Unprivileged BPF has been disabled by default to reduce attack surface as too many security issues have happened in the past (jsc#SLE-22573) You can reenable via systemctl setting /proc/sys/kernel/unprivileged_bpf_disabled to 0. (kernel.unprivileged_bpf_disabled = 0) - 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-2021-31916: An out-of-bounds (OOB) memory write flaw was found in
References
#1114648 #1141655 #1169514 #1190317 #1190523
#1191790 #1191876 #1191961 #1192045 #1192048
#1192273 #1192718 #1192750 #1192753 #1192781
#1192802 #1192866 #1192906 #1192987 SLE-22573
Cross- CVE-2021-0941 CVE-2021-20322 CVE-2021-31916
CVE-2021-34981
CVSS scores:
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
CVE-2021-31916 (NVD) : 6.7 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVE-2021-31916 (SUSE): 6.8 CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVE-2021-34981 (SUSE): 7.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected Products:
SUSE Linux Enterprise Real Time Extension 12-SP5
https://www.suse.com/security/cve/CVE-2021-0941.html
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Announcement ID: SUSE-SU-2021:3992-1
Rating: important
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