Security update for the Linux Kernel (Live Patch 37 for SLE 12 SP3) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2021:4057-1 Final 1 1 2021-12-14T08:42:36Z current 2021-12-14T08:42:36Z 2021-12-14T08:42:36Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 37 for SLE 12 SP3) This update for the Linux Kernel 4.4.180-94_138 fixes one issue. The following security issue was fixed: - CVE-2021-20322: Make the ipv4 and ipv6 ICMP exception caches less predictive to avoid information leaks about UDP ports in use. (bsc#1191790) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2021-4057,SUSE-SLE-SAP-12-SP3-2021-4053,SUSE-SLE-SAP-12-SP3-2021-4054,SUSE-SLE-SAP-12-SP3-2021-4055,SUSE-SLE-SAP-12-SP3-2021-4057,SUSE-SLE-SERVER-12-SP3-2021-4053,SUSE-SLE-SERVER-12-SP3-2021-4054,SUSE-SLE-SERVER-12-SP3-2021-4055,SUSE-SLE-SERVER-12-SP3-2021-4057 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2021/suse-su-20214057-1/ Link for SUSE-SU-2021:4057-1 https://lists.suse.com/pipermail/sle-security-updates/2021-December/009895.html E-Mail link for SUSE-SU-2021:4057-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1191813 SUSE Bug 1191813 https://www.suse.com/security/cve/CVE-2021-20322/ SUSE CVE CVE-2021-20322 page SUSE Linux Enterprise Server 12 SP3-LTSS SUSE Linux Enterprise Server for SAP Applications 12 SP3 kgraft-patch-4_4_180-94_138-default-13-2.2 kgraft-patch-4_4_180-94_147-default-6-2.1 kgraft-patch-4_4_180-94_144-default-9-2.1 kgraft-patch-4_4_180-94_141-default-12-2.2 kgraft-patch-4_4_180-94_147-default-6-2.1 as a component of SUSE Linux Enterprise Server 12 SP3-LTSS kgraft-patch-4_4_180-94_144-default-9-2.1 as a component of SUSE Linux Enterprise Server 12 SP3-LTSS kgraft-patch-4_4_180-94_141-default-12-2.2 as a component of SUSE Linux Enterprise Server 12 SP3-LTSS kgraft-patch-4_4_180-94_138-default-13-2.2 as a component of SUSE Linux Enterprise Server 12 SP3-LTSS kgraft-patch-4_4_180-94_147-default-6-2.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 kgraft-patch-4_4_180-94_144-default-9-2.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 kgraft-patch-4_4_180-94_141-default-12-2.2 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 kgraft-patch-4_4_180-94_138-default-13-2.2 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 A flaw in the processing of received ICMP errors (ICMP fragment needed and ICMP redirect) in the Linux kernel functionality was found to allow the ability to quickly scan open UDP ports. This flaw allows an off-path remote user to effectively bypass the source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well. CVE-2021-20322 SUSE Linux Enterprise Server 12 SP3-LTSS:kgraft-patch-4_4_180-94_138-default-13-2.2 SUSE Linux Enterprise Server 12 SP3-LTSS:kgraft-patch-4_4_180-94_141-default-12-2.2 SUSE Linux Enterprise Server 12 SP3-LTSS:kgraft-patch-4_4_180-94_144-default-9-2.1 SUSE Linux Enterprise Server 12 SP3-LTSS:kgraft-patch-4_4_180-94_147-default-6-2.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kgraft-patch-4_4_180-94_138-default-13-2.2 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kgraft-patch-4_4_180-94_141-default-12-2.2 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kgraft-patch-4_4_180-94_144-default-9-2.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kgraft-patch-4_4_180-94_147-default-6-2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2021/suse-su-20214057-1/ https://www.suse.com/security/cve/CVE-2021-20322.html CVE-2021-20322 https://bugzilla.suse.com/1191790 SUSE Bug 1191790 https://bugzilla.suse.com/1191813 SUSE Bug 1191813 https://bugzilla.suse.com/1193290 SUSE Bug 1193290