SUSE: 2021:3978-1 Important: Linux RT Kernel Security Update
suse
December 9, 2021
An update that solves 7 vulnerabilities, contains one feature and has 27 fixes is now available
Summary
The SUSE Linux Enterprise 15 SP2 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
#1094840 #1133021 #1152489 #1153275 #1169263
#1169514 #1170269 #1176940 #1179599 #1188601
#1190523 #1190795 #1191790 #1191851 #1191958
#1191961 #1191980 #1192045 #1192229 #1192273
#1192328 #1192718 #1192740 #1192745 #1192750
#1192753 #1192781 #1192802 #1192896 #1192906
#1192918 #1192987 #1192998 #1193002 SLE-22573
Cross- CVE-2020-27820 CVE-2021-0941 CVE-2021-20322
CVE-2021-31916 CVE-2021-34981 CVE-2021-37159
CVE-2021-43389
CVSS scores:
CVE-2020-27820 (SUSE): 3.1 CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:L
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
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Announcement ID: SUSE-SU-2021:3978-1
Rating: important
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