Security update for the Linux Kernel (Live Patch 26 for SLE 12 SP2) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2018:3789-1 Final 1 1 2018-11-16T14:56:04Z current 2018-11-16T14:56:04Z 2018-11-16T14:56:04Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 26 for SLE 12 SP2) This update for the Linux Kernel 4.4.121-92_98 fixes several issues. The following security issues were fixed: - CVE-2018-14633: A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target's code was built (i.e. depending on a compiler, compile flags and hardware architecture) an attack may lead to a system crash and thus to a denial-of-service or possibly to a non-authorized access to data exported by an iSCSI target. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is highly unlikely (bsc#1107832). - CVE-2018-5390: Fixed the possiblilty that the kernel can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service (bnc#1102682). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-SLE-SAP-12-SP2-2018-2688,SUSE-SLE-SERVER-12-SP2-2018-2688 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2018/suse-su-20183789-1/ Link for SUSE-SU-2018:3789-1 https://lists.suse.com/pipermail/sle-security-updates/2018-November/004860.html E-Mail link for SUSE-SU-2018:3789-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1102682 SUSE Bug 1102682 https://bugzilla.suse.com/1107832 SUSE Bug 1107832 https://www.suse.com/security/cve/CVE-2018-14633/ SUSE CVE CVE-2018-14633 page https://www.suse.com/security/cve/CVE-2018-5390/ SUSE CVE CVE-2018-5390 page SUSE Linux Enterprise Server 12 SP2-LTSS SUSE Linux Enterprise Server for SAP Applications 12 SP2 kgraft-patch-4_4_121-92_98-default-2-2.1 kgraft-patch-4_4_121-92_98-default-2-2.1 as a component of SUSE Linux Enterprise Server 12 SP2-LTSS kgraft-patch-4_4_121-92_98-default-2-2.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP2 A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target's code was built (i.e. depending on a compiler, compile flags and hardware architecture) an attack may lead to a system crash and thus to a denial-of-service or possibly to a non-authorized access to data exported by an iSCSI target. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is highly unlikely. Kernel versions 4.18.x, 4.14.x and 3.10.x are believed to be vulnerable. CVE-2018-14633 SUSE Linux Enterprise Server 12 SP2-LTSS:kgraft-patch-4_4_121-92_98-default-2-2.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:kgraft-patch-4_4_121-92_98-default-2-2.1 moderate 8.3 AV:N/AC:M/Au:N/C:P/I:P/A:C 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/2018/suse-su-20183789-1/ https://www.suse.com/security/cve/CVE-2018-14633.html CVE-2018-14633 https://bugzilla.suse.com/1107829 SUSE Bug 1107829 https://bugzilla.suse.com/1107832 SUSE Bug 1107832 Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet which can lead to a denial of service. CVE-2018-5390 SUSE Linux Enterprise Server 12 SP2-LTSS:kgraft-patch-4_4_121-92_98-default-2-2.1 SUSE Linux Enterprise Server for SAP Applications 12 SP2:kgraft-patch-4_4_121-92_98-default-2-2.1 moderate 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C 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/2018/suse-su-20183789-1/ https://www.suse.com/security/cve/CVE-2018-5390.html CVE-2018-5390 https://bugzilla.suse.com/1087082 SUSE Bug 1087082 https://bugzilla.suse.com/1102340 SUSE Bug 1102340 https://bugzilla.suse.com/1102682 SUSE Bug 1102682 https://bugzilla.suse.com/1103097 SUSE Bug 1103097 https://bugzilla.suse.com/1103098 SUSE Bug 1103098 https://bugzilla.suse.com/1156434 SUSE Bug 1156434