Security update for the Linux Kernel SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2017:3225-1 Final 1 1 2017-12-06T14:23:11Z current 2017-12-06T14:23:11Z 2017-12-06T14:23:11Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel The SUSE Linux Enterprise 12 SP3 kernel was updated to receive various security and bugfixes. The following security bugs were fixed: - CVE-2017-1000405: A bug in the THP CoW support could be used by local attackers to corrupt memory of other processes and cause them to crash (bnc#1069496). - CVE-2017-16939: The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel allowed local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages (bnc#1069702). The following non-security bugs were fixed: Fix a build issue on ppc64le systems (bsc#1070805) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-CAASP-ALL-2017-2006,SUSE-SLE-DESKTOP-12-SP3-2017-2006,SUSE-SLE-HA-12-SP3-2017-2006,SUSE-SLE-Live-Patching-12-SP3-2017-2006,SUSE-SLE-SDK-12-SP3-2017-2006,SUSE-SLE-SERVER-12-SP3-2017-2006,SUSE-SLE-WE-12-SP3-2017-2006 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2017/suse-su-20173225-1/ Link for SUSE-SU-2017:3225-1 https://lists.opensuse.org/opensuse-security-announce/2017-12/msg00011.html E-Mail link for SUSE-SU-2017:3225-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1069496 SUSE Bug 1069496 https://bugzilla.suse.com/1069702 SUSE Bug 1069702 https://bugzilla.suse.com/1070805 SUSE Bug 1070805 https://www.suse.com/security/cve/CVE-2017-1000405/ SUSE CVE CVE-2017-1000405 page https://www.suse.com/security/cve/CVE-2017-16939/ SUSE CVE CVE-2017-16939 page SUSE Linux Enterprise Desktop 12 SP3 SUSE Linux Enterprise High Availability Extension 12 SP3 SUSE Linux Enterprise Live Patching 12 SP3 SUSE Linux Enterprise Server 12 SP3 SUSE Linux Enterprise Server for SAP Applications 12 SP3 SUSE Linux Enterprise Software Development Kit 12 SP3 SUSE Linux Enterprise Workstation Extension 12 SP3 kernel-default-4.4.92-6.30.1 kernel-default-devel-4.4.92-6.30.1 kernel-default-extra-4.4.92-6.30.1 kernel-devel-4.4.92-6.30.1 kernel-macros-4.4.92-6.30.1 kernel-source-4.4.92-6.30.1 kernel-syms-4.4.92-6.30.1 cluster-md-kmp-default-4.4.92-6.30.1 dlm-kmp-default-4.4.92-6.30.1 gfs2-kmp-default-4.4.92-6.30.1 ocfs2-kmp-default-4.4.92-6.30.1 kgraft-patch-4_4_92-6_30-default-1-6.1 kernel-docs-4.4.92-6.30.2 kernel-obs-build-4.4.92-6.30.1 kernel-default-base-4.4.92-6.30.1 kernel-default-man-4.4.92-6.30.1 kernel-default-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Desktop 12 SP3 kernel-default-devel-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Desktop 12 SP3 kernel-default-extra-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Desktop 12 SP3 kernel-devel-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Desktop 12 SP3 kernel-macros-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Desktop 12 SP3 kernel-source-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Desktop 12 SP3 kernel-syms-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Desktop 12 SP3 cluster-md-kmp-default-4.4.92-6.30.1 as a component of SUSE Linux Enterprise High Availability Extension 12 SP3 dlm-kmp-default-4.4.92-6.30.1 as a component of SUSE Linux Enterprise High Availability Extension 12 SP3 gfs2-kmp-default-4.4.92-6.30.1 as a component of SUSE Linux Enterprise High Availability Extension 12 SP3 ocfs2-kmp-default-4.4.92-6.30.1 as a component of SUSE Linux Enterprise High Availability Extension 12 SP3 kgraft-patch-4_4_92-6_30-default-1-6.1 as a component of SUSE Linux Enterprise Live Patching 12 SP3 kernel-default-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server 12 SP3 kernel-default-base-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server 12 SP3 kernel-default-devel-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server 12 SP3 kernel-default-man-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server 12 SP3 kernel-devel-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server 12 SP3 kernel-macros-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server 12 SP3 kernel-source-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server 12 SP3 kernel-syms-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server 12 SP3 kernel-default-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 kernel-default-base-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 kernel-default-devel-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 kernel-default-man-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 kernel-devel-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 kernel-macros-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 kernel-source-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 kernel-syms-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP3 kernel-docs-4.4.92-6.30.2 as a component of SUSE Linux Enterprise Software Development Kit 12 SP3 kernel-obs-build-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Software Development Kit 12 SP3 kernel-default-extra-4.4.92-6.30.1 as a component of SUSE Linux Enterprise Workstation Extension 12 SP3 The Linux Kernel versions 2.6.38 through 4.14 have a problematic use of pmd_mkdirty() in the touch_pmd() function inside the THP implementation. touch_pmd() can be reached by get_user_pages(). In such case, the pmd will become dirty. This scenario breaks the new can_follow_write_pmd()'s logic - pmd can become dirty without going through a COW cycle. This bug is not as severe as the original "Dirty cow" because an ext4 file (or any other regular file) cannot be mapped using THP. Nevertheless, it does allow us to overwrite read-only huge pages. For example, the zero huge page and sealed shmem files can be overwritten (since their mapping can be populated using THP). Note that after the first write page-fault to the zero page, it will be replaced with a new fresh (and zeroed) thp. CVE-2017-1000405 SUSE Linux Enterprise Desktop 12 SP3:kernel-default-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-default-devel-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-default-extra-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-devel-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-macros-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-source-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-syms-4.4.92-6.30.1 SUSE Linux Enterprise High Availability Extension 12 SP3:cluster-md-kmp-default-4.4.92-6.30.1 SUSE Linux Enterprise High Availability Extension 12 SP3:dlm-kmp-default-4.4.92-6.30.1 SUSE Linux Enterprise High Availability Extension 12 SP3:gfs2-kmp-default-4.4.92-6.30.1 SUSE Linux Enterprise High Availability Extension 12 SP3:ocfs2-kmp-default-4.4.92-6.30.1 SUSE Linux Enterprise Live Patching 12 SP3:kgraft-patch-4_4_92-6_30-default-1-6.1 SUSE Linux Enterprise Server 12 SP3:kernel-default-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-default-base-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-default-devel-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-default-man-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-devel-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-macros-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-source-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-syms-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-default-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-default-base-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-default-devel-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-default-man-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-devel-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-macros-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-source-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-syms-4.4.92-6.30.1 SUSE Linux Enterprise Software Development Kit 12 SP3:kernel-docs-4.4.92-6.30.2 SUSE Linux Enterprise Software Development Kit 12 SP3:kernel-obs-build-4.4.92-6.30.1 SUSE Linux Enterprise Workstation Extension 12 SP3:kernel-default-extra-4.4.92-6.30.1 important 3.6 AV:L/AC:L/Au:N/C:N/I:P/A:P 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/2017/suse-su-20173225-1/ https://www.suse.com/security/cve/CVE-2017-1000405.html CVE-2017-1000405 https://bugzilla.suse.com/1069496 SUSE Bug 1069496 https://bugzilla.suse.com/1070307 SUSE Bug 1070307 The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages. CVE-2017-16939 SUSE Linux Enterprise Desktop 12 SP3:kernel-default-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-default-devel-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-default-extra-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-devel-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-macros-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-source-4.4.92-6.30.1 SUSE Linux Enterprise Desktop 12 SP3:kernel-syms-4.4.92-6.30.1 SUSE Linux Enterprise High Availability Extension 12 SP3:cluster-md-kmp-default-4.4.92-6.30.1 SUSE Linux Enterprise High Availability Extension 12 SP3:dlm-kmp-default-4.4.92-6.30.1 SUSE Linux Enterprise High Availability Extension 12 SP3:gfs2-kmp-default-4.4.92-6.30.1 SUSE Linux Enterprise High Availability Extension 12 SP3:ocfs2-kmp-default-4.4.92-6.30.1 SUSE Linux Enterprise Live Patching 12 SP3:kgraft-patch-4_4_92-6_30-default-1-6.1 SUSE Linux Enterprise Server 12 SP3:kernel-default-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-default-base-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-default-devel-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-default-man-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-devel-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-macros-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-source-4.4.92-6.30.1 SUSE Linux Enterprise Server 12 SP3:kernel-syms-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-default-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-default-base-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-default-devel-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-default-man-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-devel-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-macros-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-source-4.4.92-6.30.1 SUSE Linux Enterprise Server for SAP Applications 12 SP3:kernel-syms-4.4.92-6.30.1 SUSE Linux Enterprise Software Development Kit 12 SP3:kernel-docs-4.4.92-6.30.2 SUSE Linux Enterprise Software Development Kit 12 SP3:kernel-obs-build-4.4.92-6.30.1 SUSE Linux Enterprise Workstation Extension 12 SP3:kernel-default-extra-4.4.92-6.30.1 important 6.9 AV:L/AC:M/Au:N/C:C/I:C/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/2017/suse-su-20173225-1/ https://www.suse.com/security/cve/CVE-2017-16939.html CVE-2017-16939 https://bugzilla.suse.com/1069702 SUSE Bug 1069702 https://bugzilla.suse.com/1069708 SUSE Bug 1069708 https://bugzilla.suse.com/1115893 SUSE Bug 1115893 https://bugzilla.suse.com/1120260 SUSE Bug 1120260