PublicDateAtUSN: 2018-07-26 Candidate: CVE-2017-18344 PublicDate: 2018-07-26 19:29:00 UTC References: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18344 https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8 https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe http://www.openwall.com/lists/oss-security/2018/08/09/6 https://ubuntu.com/security/notices/USN-3742-1 https://ubuntu.com/security/notices/USN-3742-2 Description: The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE). Ubuntu-Description: Andrey Konovalov discovered an out-of-bounds read in the POSIX timers subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. Notes: Bugs: Priority: high Discovered-by: Andrey Konovalov Assigned-to: CVSS: nvd: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N [5.5 MEDIUM] Patches_linux: break-fix: 57b8015e07a70301e9ec9f324db1a8b73b5a1e2b cef31d9af908243421258f1df35a4a644604efbe upstream_linux: released (4.15~rc4) precise/esm_linux: not-affected trusty_linux: released (3.13.0-155.205) trusty/esm_linux: released (3.13.0-155.205) xenial_linux: released (4.4.0-121.145) esm-infra/xenial_linux: released (4.4.0-121.145) bionic_linux: not-affected (4.15.0-10.11) cosmic_linux: not-affected (4.15.0-20.21) devel_linux: not-affected (4.18.0-10.11) Patches_linux-lts-trusty: upstream_linux-lts-trusty: released (4.15~rc4) precise/esm_linux-lts-trusty: released (3.13.0-155.206~precise1) trusty_linux-lts-trusty: DNE trusty/esm_linux-lts-trusty: DNE xenial_linux-lts-trusty: DNE bionic_linux-lts-trusty: DNE cosmic_linux-lts-trusty: DNE devel_linux-lts-trusty: DNE Patches_linux-goldfish: upstream_linux-goldfish: released (4.15~rc4) precise/esm_linux-goldfish: DNE trusty_linux-goldfish: ignored (abandoned) trusty/esm_linux-goldfish: DNE (trusty was ignored [abandoned]) xenial_linux-goldfish: ignored (end-of-life) bionic_linux-goldfish: DNE cosmic_linux-goldfish: DNE devel_linux-goldfish: DNE Patches_linux-grouper: upstream_linux-grouper: released (4.15~rc4) precise/esm_linux-grouper: DNE trusty_linux-grouper: ignored (abandoned) trusty/esm_linux-grouper: DNE (trusty was ignored [abandoned]) xenial_linux-grouper: DNE bionic_linux-grouper: DNE cosmic_linux-grouper: DNE devel_linux-grouper: DNE Patches_linux-maguro: upstream_linux-maguro: released (4.15~rc4) precise/esm_linux-maguro: DNE trusty_linux-maguro: ignored (abandoned) trusty/esm_linux-maguro: DNE (trusty was ignored [abandoned]) xenial_linux-maguro: DNE bionic_linux-maguro: DNE cosmic_linux-maguro: DNE devel_linux-maguro: DNE Patches_linux-mako: upstream_linux-mako: released (4.15~rc4) precise/esm_linux-mako: DNE trusty_linux-mako: ignored (abandoned) trusty/esm_linux-mako: DNE (trusty was ignored [abandoned]) xenial_linux-mako: ignored (abandoned) bionic_linux-mako: DNE cosmic_linux-mako: DNE devel_linux-mako: DNE Patches_linux-manta: upstream_linux-manta: released (4.15~rc4) precise/esm_linux-manta: DNE trusty_linux-manta: ignored (abandoned) trusty/esm_linux-manta: DNE (trusty was ignored [abandoned]) xenial_linux-manta: DNE bionic_linux-manta: DNE cosmic_linux-manta: DNE devel_linux-manta: DNE Patches_linux-flo: upstream_linux-flo: released (4.15~rc4) precise/esm_linux-flo: DNE trusty_linux-flo: ignored (abandoned) trusty/esm_linux-flo: DNE (trusty was ignored [abandoned]) xenial_linux-flo: ignored (abandoned) bionic_linux-flo: DNE cosmic_linux-flo: DNE devel_linux-flo: DNE Patches_linux-raspi2: upstream_linux-raspi2: released (4.15~rc4) precise/esm_linux-raspi2: DNE trusty_linux-raspi2: DNE trusty/esm_linux-raspi2: DNE xenial_linux-raspi2: released (4.4.0-1087.95) bionic_linux-raspi2: not-affected (4.15.0-1006.7) cosmic_linux-raspi2: not-affected (4.15.0-1010.11) devel_linux-raspi2: not-affected (4.18.0-1005.7) Patches_linux-lts-utopic: upstream_linux-lts-utopic: released (4.15~rc4) precise/esm_linux-lts-utopic: DNE trusty_linux-lts-utopic: ignored (out of standard support) trusty/esm_linux-lts-utopic: DNE (trusty was ignored [out of standard support]) xenial_linux-lts-utopic: DNE bionic_linux-lts-utopic: DNE cosmic_linux-lts-utopic: DNE devel_linux-lts-utopic: DNE Patches_linux-lts-vivid: upstream_linux-lts-vivid: released (4.15~rc4) precise/esm_linux-lts-vivid: DNE trusty_linux-lts-vivid: ignored (out of standard support) trusty/esm_linux-lts-vivid: DNE (trusty was ignored [out of standard support]) xenial_linux-lts-vivid: DNE bionic_linux-lts-vivid: DNE cosmic_linux-lts-vivid: DNE devel_linux-lts-vivid: DNE Patches_linux-lts-wily: upstream_linux-lts-wily: released (4.15~rc4) precise/esm_linux-lts-wily: DNE trusty_linux-lts-wily: ignored (out of standard support) trusty/esm_linux-lts-wily: DNE (trusty was ignored [out of standard support]) xenial_linux-lts-wily: DNE bionic_linux-lts-wily: DNE cosmic_linux-lts-wily: DNE devel_linux-lts-wily: DNE Patches_linux-lts-xenial: upstream_linux-lts-xenial: released (4.15~rc4) precise/esm_linux-lts-xenial: DNE trusty_linux-lts-xenial: released (4.4.0-121.145~14.04.1) trusty/esm_linux-lts-xenial: released (4.4.0-121.145~14.04.1) xenial_linux-lts-xenial: DNE bionic_linux-lts-xenial: DNE cosmic_linux-lts-xenial: DNE devel_linux-lts-xenial: DNE Patches_linux-snapdragon: upstream_linux-snapdragon: released (4.15~rc4) precise/esm_linux-snapdragon: DNE trusty_linux-snapdragon: DNE trusty/esm_linux-snapdragon: DNE xenial_linux-snapdragon: released (4.4.0-1090.95) bionic_linux-snapdragon: not-affected cosmic_linux-snapdragon: DNE devel_linux-snapdragon: DNE Patches_linux-aws: upstream_linux-aws: released (4.15~rc4) precise/esm_linux-aws: DNE trusty_linux-aws: released (4.4.0-1017.17) trusty/esm_linux-aws: released (4.4.0-1017.17) xenial_linux-aws: released (4.4.0-1055.64) esm-infra/xenial_linux-aws: released (4.4.0-1055.64) bionic_linux-aws: not-affected (4.15.0-1001.1) cosmic_linux-aws: not-affected (4.15.0-1007.7) devel_linux-aws: not-affected (4.18.0-1002.3) Patches_linux-hwe: upstream_linux-hwe: released (4.15~rc4) precise/esm_linux-hwe: DNE trusty_linux-hwe: DNE trusty/esm_linux-hwe: DNE xenial_linux-hwe: released (4.15.0-24.26~16.04.1) esm-infra/xenial_linux-hwe: released (4.15.0-24.26~16.04.1) bionic_linux-hwe: not-affected cosmic_linux-hwe: DNE devel_linux-hwe: DNE Patches_linux-hwe-edge: upstream_linux-hwe-edge: released (4.15~rc4) precise/esm_linux-hwe-edge: DNE trusty_linux-hwe-edge: DNE trusty/esm_linux-hwe-edge: DNE xenial_linux-hwe-edge: released (4.15.0-24.26~16.04.1) esm-infra/xenial_linux-hwe-edge: released (4.15.0-24.26~16.04.1) bionic_linux-hwe-edge: not-affected (4.18.0-11.12~18.04.1) cosmic_linux-hwe-edge: DNE devel_linux-hwe-edge: DNE Patches_linux-gke: upstream_linux-gke: released (4.15~rc4) precise/esm_linux-gke: DNE trusty_linux-gke: DNE trusty/esm_linux-gke: DNE xenial_linux-gke: ignored (end-of-life) bionic_linux-gke: DNE cosmic_linux-gke: DNE devel_linux-gke: DNE Patches_linux-azure: upstream_linux-azure: released (4.15~rc4) precise/esm_linux-azure: DNE trusty_linux-azure: not-affected (4.15.0-1023.24~14.04.1) trusty/esm_linux-azure: not-affected (4.15.0-1023.24~14.04.1) xenial_linux-azure: released (4.15.0-1013.13~16.04.2) esm-infra/xenial_linux-azure: released (4.15.0-1013.13~16.04.2) bionic_linux-azure: not-affected (4.15.0-1002.2) cosmic_linux-azure: not-affected (4.15.0-1009.9) devel_linux-azure: not-affected (4.18.0-1003.3) Patches_linux-azure-edge: upstream_linux-azure-edge: released (4.15~rc4) precise/esm_linux-azure-edge: DNE trusty_linux-azure-edge: DNE trusty/esm_linux-azure-edge: DNE xenial_linux-azure-edge: not-affected (4.15.0-1002.2) bionic_linux-azure-edge: not-affected (4.18.0-1004.4~18.04.1) cosmic_linux-azure-edge: DNE devel_linux-azure-edge: DNE Patches_linux-gcp: upstream_linux-gcp: released (4.15~rc4) precise/esm_linux-gcp: DNE trusty_linux-gcp: DNE trusty/esm_linux-gcp: DNE xenial_linux-gcp: released (4.15.0-1014.14~16.04.1) esm-infra/xenial_linux-gcp: released (4.15.0-1014.14~16.04.1) bionic_linux-gcp: not-affected (4.15.0-1001.1) cosmic_linux-gcp: not-affected (4.15.0-1006.6) devel_linux-gcp: not-affected (4.18.0-1002.3) Patches_linux-kvm: upstream_linux-kvm: released (4.15~rc4) precise/esm_linux-kvm: DNE trusty_linux-kvm: DNE trusty/esm_linux-kvm: DNE xenial_linux-kvm: released (4.4.0-1021.26) esm-infra/xenial_linux-kvm: released (4.4.0-1021.26) bionic_linux-kvm: not-affected (4.15.0-1002.2) cosmic_linux-kvm: not-affected (4.15.0-1008.8) devel_linux-kvm: not-affected (4.18.0-1003.3) Patches_linux-euclid: upstream_linux-euclid: released (4.15~rc4) precise/esm_linux-euclid: DNE trusty_linux-euclid: DNE trusty/esm_linux-euclid: DNE xenial_linux-euclid: released (4.4.0-9029.31) bionic_linux-euclid: DNE cosmic_linux-euclid: DNE devel_linux-euclid: DNE Patches_linux-oem: upstream_linux-oem: released (4.15~rc4) precise/esm_linux-oem: DNE trusty_linux-oem: DNE trusty/esm_linux-oem: DNE xenial_linux-oem: ignored (was needed now end-of-life) bionic_linux-oem: not-affected (4.15.0-1002.3) cosmic_linux-oem: not-affected (4.15.0-1004.5) devel_linux-oem: not-affected (4.15.0-1021.24)