PublicDateAtUSN: 2015-04-06 Candidate: CVE-2015-2925 PublicDate: 2015-11-16 11:59:00 UTC References: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2925 http://permalink.gmane.org/gmane.linux.kernel.containers/29173 http://permalink.gmane.org/gmane.linux.kernel.containers/29177 http://article.gmane.org/gmane.linux.kernel.stable/151103 https://ubuntu.com/security/notices/USN-2794-1 https://ubuntu.com/security/notices/USN-2792-1 https://ubuntu.com/security/notices/USN-2795-1 https://ubuntu.com/security/notices/USN-2799-1 https://ubuntu.com/security/notices/USN-2796-1 https://ubuntu.com/security/notices/USN-2798-1 https://ubuntu.com/security/notices/USN-2797-1 Description: The prepend_path function in fs/dcache.c in the Linux kernel before 4.2.4 does not properly handle rename actions inside a bind mount, which allows local users to bypass an intended container protection mechanism by renaming a directory, related to a "double-chroot attack." Ubuntu-Description: It was discovered that in certain situations, a directory could be renamed outside of a bind mounted location. An attacker could use this to escape bind mount containment and gain access to sensitive information. Notes: jdstrand> android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.10 and earlier preview kernels jdstrand> linux-lts-saucy no longer receives official support jdstrand> linux-lts-quantal no longer receives official support kamal> See gmane-151103 article for more backport discussion, specifically that Eric B.'s backport eliminates the requirement for this patch: 70291ae namei: lift (open-coded) terminate_walk() in follow_dotdot_rcu() into callers Bugs: https://launchpad.net/bugs/1441108 Priority: medium Discovered-by: Assigned-to: CVSS: Patches_linux: break-fix: - cde93be45a8a90d8c264c776fab63487b5038a65 break-fix: - 397d425dc26da728396e66d392d5dcb8dac30c37 upstream_linux: released (4.3~rc1) lucid_linux: ignored (reached end-of-life) precise_linux: released (3.2.0-93.133) precise/esm_linux: released (3.2.0-93.133) trusty_linux: released (3.13.0-67.110) trusty/esm_linux: released (3.13.0-67.110) utopic_linux: ignored (reached end-of-life) vivid_linux: released (3.19.0-32.37) vivid/ubuntu-core_linux: released (3.19.0-32.37) vivid/stable-phone-overlay_linux: DNE wily_linux: not-affected (4.2.0-15.18) xenial_linux: not-affected (4.2.0-16.19) esm-infra/xenial_linux: not-affected (4.2.0-16.19) yakkety_linux: not-affected (4.4.0-21.37) zesty_linux: not-affected (4.8.0-22.24) devel_linux: not-affected (4.10.0-19.21) Patches_linux-ec2: upstream_linux-ec2: released (4.3~rc1) lucid_linux-ec2: ignored (reached end-of-life) precise_linux-ec2: DNE precise/esm_linux-ec2: DNE trusty_linux-ec2: DNE trusty/esm_linux-ec2: DNE utopic_linux-ec2: DNE vivid_linux-ec2: DNE vivid/ubuntu-core_linux-ec2: DNE vivid/stable-phone-overlay_linux-ec2: DNE wily_linux-ec2: DNE xenial_linux-ec2: DNE yakkety_linux-ec2: DNE zesty_linux-ec2: DNE devel_linux-ec2: DNE Patches_linux-mvl-dove: upstream_linux-mvl-dove: released (4.3~rc1) lucid_linux-mvl-dove: ignored (reached end-of-life) precise_linux-mvl-dove: DNE precise/esm_linux-mvl-dove: DNE trusty_linux-mvl-dove: DNE trusty/esm_linux-mvl-dove: DNE utopic_linux-mvl-dove: DNE vivid_linux-mvl-dove: DNE vivid/ubuntu-core_linux-mvl-dove: DNE vivid/stable-phone-overlay_linux-mvl-dove: DNE wily_linux-mvl-dove: DNE xenial_linux-mvl-dove: DNE yakkety_linux-mvl-dove: DNE zesty_linux-mvl-dove: DNE devel_linux-mvl-dove: DNE Patches_linux-ti-omap4: upstream_linux-ti-omap4: released (4.3~rc1) lucid_linux-ti-omap4: DNE precise_linux-ti-omap4: released (3.2.0-1473.95) precise/esm_linux-ti-omap4: DNE (precise was released [3.2.0-1473.95]) trusty_linux-ti-omap4: DNE trusty/esm_linux-ti-omap4: DNE utopic_linux-ti-omap4: DNE vivid_linux-ti-omap4: DNE vivid/ubuntu-core_linux-ti-omap4: DNE vivid/stable-phone-overlay_linux-ti-omap4: DNE wily_linux-ti-omap4: DNE xenial_linux-ti-omap4: DNE yakkety_linux-ti-omap4: DNE zesty_linux-ti-omap4: DNE devel_linux-ti-omap4: DNE Patches_linux-fsl-imx51: upstream_linux-fsl-imx51: released (4.3~rc1) lucid_linux-fsl-imx51: ignored (reached end-of-life, does not affect buildd) precise_linux-fsl-imx51: DNE precise/esm_linux-fsl-imx51: DNE trusty_linux-fsl-imx51: DNE trusty/esm_linux-fsl-imx51: DNE utopic_linux-fsl-imx51: DNE vivid_linux-fsl-imx51: DNE vivid/ubuntu-core_linux-fsl-imx51: DNE vivid/stable-phone-overlay_linux-fsl-imx51: DNE wily_linux-fsl-imx51: DNE xenial_linux-fsl-imx51: DNE yakkety_linux-fsl-imx51: DNE zesty_linux-fsl-imx51: DNE devel_linux-fsl-imx51: DNE Patches_linux-linaro-omap: upstream_linux-linaro-omap: released (4.3~rc1) lucid_linux-linaro-omap: DNE precise_linux-linaro-omap: ignored (abandoned) precise/esm_linux-linaro-omap: DNE (precise was ignored [abandoned]) trusty_linux-linaro-omap: DNE trusty/esm_linux-linaro-omap: DNE utopic_linux-linaro-omap: DNE vivid_linux-linaro-omap: DNE vivid/ubuntu-core_linux-linaro-omap: DNE vivid/stable-phone-overlay_linux-linaro-omap: DNE wily_linux-linaro-omap: DNE xenial_linux-linaro-omap: DNE yakkety_linux-linaro-omap: DNE zesty_linux-linaro-omap: DNE devel_linux-linaro-omap: DNE Patches_linux-linaro-shared: upstream_linux-linaro-shared: released (4.3~rc1) lucid_linux-linaro-shared: DNE precise_linux-linaro-shared: ignored (abandoned) precise/esm_linux-linaro-shared: DNE (precise was ignored [abandoned]) trusty_linux-linaro-shared: DNE trusty/esm_linux-linaro-shared: DNE utopic_linux-linaro-shared: DNE vivid_linux-linaro-shared: DNE vivid/ubuntu-core_linux-linaro-shared: DNE vivid/stable-phone-overlay_linux-linaro-shared: DNE wily_linux-linaro-shared: DNE xenial_linux-linaro-shared: DNE yakkety_linux-linaro-shared: DNE zesty_linux-linaro-shared: DNE devel_linux-linaro-shared: DNE Patches_linux-linaro-vexpress: upstream_linux-linaro-vexpress: released (4.3~rc1) lucid_linux-linaro-vexpress: DNE precise_linux-linaro-vexpress: ignored (abandoned) precise/esm_linux-linaro-vexpress: DNE (precise was ignored [abandoned]) trusty_linux-linaro-vexpress: DNE trusty/esm_linux-linaro-vexpress: DNE utopic_linux-linaro-vexpress: DNE vivid_linux-linaro-vexpress: DNE vivid/ubuntu-core_linux-linaro-vexpress: DNE vivid/stable-phone-overlay_linux-linaro-vexpress: DNE wily_linux-linaro-vexpress: DNE xenial_linux-linaro-vexpress: DNE yakkety_linux-linaro-vexpress: DNE zesty_linux-linaro-vexpress: DNE devel_linux-linaro-vexpress: DNE Patches_linux-qcm-msm: upstream_linux-qcm-msm: released (4.3~rc1) lucid_linux-qcm-msm: ignored (abandoned) precise_linux-qcm-msm: ignored (abandoned) precise/esm_linux-qcm-msm: DNE (precise was ignored [abandoned]) trusty_linux-qcm-msm: DNE trusty/esm_linux-qcm-msm: DNE utopic_linux-qcm-msm: DNE vivid_linux-qcm-msm: DNE vivid/ubuntu-core_linux-qcm-msm: DNE vivid/stable-phone-overlay_linux-qcm-msm: DNE wily_linux-qcm-msm: DNE xenial_linux-qcm-msm: DNE yakkety_linux-qcm-msm: DNE zesty_linux-qcm-msm: DNE devel_linux-qcm-msm: DNE Tags_linux-armadaxp: not-ue Patches_linux-armadaxp: upstream_linux-armadaxp: released (4.3~rc1) lucid_linux-armadaxp: DNE precise_linux-armadaxp: released (3.2.0-1659.83) precise/esm_linux-armadaxp: DNE (precise was released [3.2.0-1659.83]) trusty_linux-armadaxp: DNE trusty/esm_linux-armadaxp: DNE utopic_linux-armadaxp: DNE vivid_linux-armadaxp: DNE vivid/ubuntu-core_linux-armadaxp: DNE vivid/stable-phone-overlay_linux-armadaxp: DNE wily_linux-armadaxp: DNE xenial_linux-armadaxp: DNE yakkety_linux-armadaxp: DNE zesty_linux-armadaxp: DNE devel_linux-armadaxp: DNE Tags_linux-lts-quantal: not-ue Patches_linux-lts-quantal: upstream_linux-lts-quantal: released (4.3~rc1) lucid_linux-lts-quantal: DNE precise_linux-lts-quantal: ignored (was needed now end-of-life) precise/esm_linux-lts-quantal: DNE (precise was ignored [was needed now end-of-life]) trusty_linux-lts-quantal: DNE trusty/esm_linux-lts-quantal: DNE utopic_linux-lts-quantal: DNE vivid_linux-lts-quantal: DNE vivid/ubuntu-core_linux-lts-quantal: DNE vivid/stable-phone-overlay_linux-lts-quantal: DNE wily_linux-lts-quantal: DNE xenial_linux-lts-quantal: DNE yakkety_linux-lts-quantal: DNE zesty_linux-lts-quantal: DNE devel_linux-lts-quantal: DNE Patches_linux-lts-raring: upstream_linux-lts-raring: released (4.3~rc1) lucid_linux-lts-raring: DNE precise_linux-lts-raring: ignored (was needs-triage now end-of-life) precise/esm_linux-lts-raring: DNE (precise was ignored [was needs-triage now end-of-life]) trusty_linux-lts-raring: DNE trusty/esm_linux-lts-raring: DNE utopic_linux-lts-raring: DNE vivid_linux-lts-raring: DNE vivid/ubuntu-core_linux-lts-raring: DNE vivid/stable-phone-overlay_linux-lts-raring: DNE wily_linux-lts-raring: DNE xenial_linux-lts-raring: DNE yakkety_linux-lts-raring: DNE zesty_linux-lts-raring: DNE devel_linux-lts-raring: DNE Tags_linux-lts-saucy: not-ue Patches_linux-lts-saucy: upstream_linux-lts-saucy: released (4.3~rc1) lucid_linux-lts-saucy: DNE precise_linux-lts-saucy: ignored (was needed now end-of-life) precise/esm_linux-lts-saucy: DNE (precise was ignored [was needed now end-of-life]) trusty_linux-lts-saucy: DNE trusty/esm_linux-lts-saucy: DNE utopic_linux-lts-saucy: DNE vivid_linux-lts-saucy: DNE vivid/ubuntu-core_linux-lts-saucy: DNE vivid/stable-phone-overlay_linux-lts-saucy: DNE wily_linux-lts-saucy: DNE xenial_linux-lts-saucy: DNE yakkety_linux-lts-saucy: DNE zesty_linux-lts-saucy: DNE devel_linux-lts-saucy: DNE Patches_linux-lts-trusty: upstream_linux-lts-trusty: released (4.3~rc1) lucid_linux-lts-trusty: DNE precise_linux-lts-trusty: released (3.13.0-67.110~precise1) precise/esm_linux-lts-trusty: released (3.13.0-67.110~precise1) trusty_linux-lts-trusty: DNE trusty/esm_linux-lts-trusty: DNE utopic_linux-lts-trusty: DNE vivid_linux-lts-trusty: DNE vivid/ubuntu-core_linux-lts-trusty: DNE vivid/stable-phone-overlay_linux-lts-trusty: DNE wily_linux-lts-trusty: DNE xenial_linux-lts-trusty: DNE yakkety_linux-lts-trusty: DNE zesty_linux-lts-trusty: DNE devel_linux-lts-trusty: DNE Patches_linux-goldfish: upstream_linux-goldfish: released (4.3~rc1) lucid_linux-goldfish: DNE precise_linux-goldfish: DNE precise/esm_linux-goldfish: DNE trusty_linux-goldfish: ignored trusty/esm_linux-goldfish: DNE (trusty was ignored) utopic_linux-goldfish: ignored (reached end-of-life) vivid_linux-goldfish: ignored (reached end-of-life) vivid/ubuntu-core_linux-goldfish: DNE vivid/stable-phone-overlay_linux-goldfish: DNE wily_linux-goldfish: ignored (reached end-of-life) xenial_linux-goldfish: ignored (abandoned) yakkety_linux-goldfish: ignored (abandoned) zesty_linux-goldfish: ignored (abandoned) devel_linux-goldfish: DNE Patches_linux-grouper: upstream_linux-grouper: released (4.3~rc1) lucid_linux-grouper: DNE precise_linux-grouper: DNE precise/esm_linux-grouper: DNE trusty_linux-grouper: ignored trusty/esm_linux-grouper: DNE (trusty was ignored) utopic_linux-grouper: ignored (reached end-of-life) vivid_linux-grouper: DNE vivid/ubuntu-core_linux-grouper: DNE vivid/stable-phone-overlay_linux-grouper: DNE wily_linux-grouper: DNE xenial_linux-grouper: DNE yakkety_linux-grouper: DNE zesty_linux-grouper: DNE devel_linux-grouper: DNE Patches_linux-maguro: upstream_linux-maguro: released (4.3~rc1) lucid_linux-maguro: DNE precise_linux-maguro: DNE precise/esm_linux-maguro: DNE trusty_linux-maguro: ignored trusty/esm_linux-maguro: DNE (trusty was ignored) utopic_linux-maguro: DNE vivid_linux-maguro: DNE vivid/ubuntu-core_linux-maguro: DNE vivid/stable-phone-overlay_linux-maguro: DNE wily_linux-maguro: DNE xenial_linux-maguro: DNE yakkety_linux-maguro: DNE zesty_linux-maguro: DNE devel_linux-maguro: DNE Patches_linux-mako: upstream_linux-mako: released (4.3~rc1) lucid_linux-mako: DNE precise_linux-mako: DNE precise/esm_linux-mako: DNE trusty_linux-mako: ignored trusty/esm_linux-mako: DNE (trusty was ignored) utopic_linux-mako: ignored (reached end-of-life) vivid_linux-mako: ignored (reached end-of-life) vivid/ubuntu-core_linux-mako: DNE vivid/stable-phone-overlay_linux-mako: ignored (abandoned) wily_linux-mako: ignored (reached end-of-life) xenial_linux-mako: ignored (abandoned) yakkety_linux-mako: ignored (abandoned) zesty_linux-mako: DNE devel_linux-mako: DNE Patches_linux-manta: upstream_linux-manta: released (4.3~rc1) lucid_linux-manta: DNE precise_linux-manta: DNE precise/esm_linux-manta: DNE trusty_linux-manta: ignored trusty/esm_linux-manta: DNE (trusty was ignored) utopic_linux-manta: ignored (reached end-of-life) vivid_linux-manta: ignored (reached end-of-life) vivid/ubuntu-core_linux-manta: DNE vivid/stable-phone-overlay_linux-manta: DNE wily_linux-manta: ignored (reached end-of-life) xenial_linux-manta: DNE yakkety_linux-manta: DNE zesty_linux-manta: DNE devel_linux-manta: DNE Patches_linux-flo: upstream_linux-flo: released (4.3~rc1) lucid_linux-flo: DNE precise_linux-flo: DNE precise/esm_linux-flo: DNE trusty_linux-flo: ignored trusty/esm_linux-flo: DNE (trusty was ignored) utopic_linux-flo: ignored (reached end-of-life) vivid_linux-flo: ignored (reached end-of-life) vivid/ubuntu-core_linux-flo: DNE vivid/stable-phone-overlay_linux-flo: ignored (abandoned) wily_linux-flo: ignored (reached end-of-life) xenial_linux-flo: ignored (abandoned) yakkety_linux-flo: ignored (abandoned) zesty_linux-flo: DNE devel_linux-flo: DNE Patches_linux-lts-utopic: upstream_linux-lts-utopic: released (4.3~rc1) lucid_linux-lts-utopic: DNE precise_linux-lts-utopic: DNE precise/esm_linux-lts-utopic: DNE trusty_linux-lts-utopic: released (3.16.0-52.71~14.04.1) trusty/esm_linux-lts-utopic: DNE (trusty was released [3.16.0-52.71~14.04.1]) utopic_linux-lts-utopic: DNE vivid_linux-lts-utopic: DNE vivid/ubuntu-core_linux-lts-utopic: DNE vivid/stable-phone-overlay_linux-lts-utopic: DNE wily_linux-lts-utopic: DNE xenial_linux-lts-utopic: DNE yakkety_linux-lts-utopic: DNE zesty_linux-lts-utopic: DNE devel_linux-lts-utopic: DNE Patches_linux-2.6: upstream_linux-2.6: released (4.3~rc1) lucid_linux-2.6: DNE precise_linux-2.6: DNE precise/esm_linux-2.6: DNE trusty_linux-2.6: DNE trusty/esm_linux-2.6: DNE utopic_linux-2.6: DNE vivid_linux-2.6: DNE vivid/ubuntu-core_linux-2.6: DNE vivid/stable-phone-overlay_linux-2.6: DNE wily_linux-2.6: DNE xenial_linux-2.6: DNE yakkety_linux-2.6: DNE zesty_linux-2.6: DNE devel_linux-2.6: DNE Patches_linux-lts-vivid: upstream_linux-lts-vivid: released (4.3~rc1) lucid_linux-lts-vivid: DNE precise_linux-lts-vivid: DNE precise/esm_linux-lts-vivid: DNE trusty_linux-lts-vivid: released (3.19.0-32.37~14.04.1) trusty/esm_linux-lts-vivid: DNE (trusty was released [3.19.0-32.37~14.04.1]) utopic_linux-lts-vivid: DNE vivid_linux-lts-vivid: DNE vivid/ubuntu-core_linux-lts-vivid: DNE vivid/stable-phone-overlay_linux-lts-vivid: DNE wily_linux-lts-vivid: DNE xenial_linux-lts-vivid: DNE yakkety_linux-lts-vivid: DNE zesty_linux-lts-vivid: DNE devel_linux-lts-vivid: DNE Patches_linux-lts-wily: upstream_linux-lts-wily: released (4.3~rc1) precise_linux-lts-wily: DNE precise/esm_linux-lts-wily: DNE trusty_linux-lts-wily: not-affected (4.2.0-18.22~14.04.1) trusty/esm_linux-lts-wily: DNE (trusty was not-affected [4.2.0-18.22~14.04.1]) vivid_linux-lts-wily: DNE vivid/ubuntu-core_linux-lts-wily: DNE vivid/stable-phone-overlay_linux-lts-wily: DNE wily_linux-lts-wily: DNE xenial_linux-lts-wily: DNE yakkety_linux-lts-wily: DNE zesty_linux-lts-wily: DNE devel_linux-lts-wily: DNE Patches_linux-raspi2: upstream_linux-raspi2: released (4.3~rc1) precise_linux-raspi2: DNE precise/esm_linux-raspi2: DNE trusty_linux-raspi2: DNE trusty/esm_linux-raspi2: DNE vivid_linux-raspi2: DNE vivid/ubuntu-core_linux-raspi2: released (4.2.0-1014.21) vivid/stable-phone-overlay_linux-raspi2: DNE wily_linux-raspi2: not-affected (4.2.0-1013.19) xenial_linux-raspi2: not-affected (4.2.0-1013.19) yakkety_linux-raspi2: not-affected (4.4.0-1009.10) zesty_linux-raspi2: not-affected (4.8.0-1013.15) devel_linux-raspi2: not-affected (4.10.0-1004.6) Patches_linux-lts-xenial: upstream_linux-lts-xenial: released (4.3~rc1) precise_linux-lts-xenial: DNE precise/esm_linux-lts-xenial: DNE trusty_linux-lts-xenial: not-affected (4.4.0-13.29~14.04.1) trusty/esm_linux-lts-xenial: not-affected (4.4.0-13.29~14.04.1) vivid_linux-lts-xenial: DNE vivid/ubuntu-core_linux-lts-xenial: DNE vivid/stable-phone-overlay_linux-lts-xenial: DNE wily_linux-lts-xenial: DNE xenial_linux-lts-xenial: DNE yakkety_linux-lts-xenial: DNE zesty_linux-lts-xenial: DNE devel_linux-lts-xenial: DNE Patches_linux-snapdragon: upstream_linux-snapdragon: released (4.3~rc1) precise_linux-snapdragon: DNE precise/esm_linux-snapdragon: DNE trusty_linux-snapdragon: DNE trusty/esm_linux-snapdragon: DNE vivid/ubuntu-core_linux-snapdragon: DNE vivid/stable-phone-overlay_linux-snapdragon: DNE wily_linux-snapdragon: DNE xenial_linux-snapdragon: not-affected (4.4.0-1012.12) yakkety_linux-snapdragon: not-affected (4.4.0-1012.12) zesty_linux-snapdragon: not-affected (4.4.0-1029.32) devel_linux-snapdragon: not-affected (4.4.0-1050.54) Patches_linux-aws: upstream_linux-aws: released (4.3~rc1) precise_linux-aws: DNE precise/esm_linux-aws: DNE trusty_linux-aws: not-affected (4.4.0-1002.2) trusty/esm_linux-aws: not-affected (4.4.0-1002.2) vivid/ubuntu-core_linux-aws: DNE vivid/stable-phone-overlay_linux-aws: DNE xenial_linux-aws: not-affected (4.4.0-1001.10) esm-infra/xenial_linux-aws: not-affected (4.4.0-1001.10) yakkety_linux-aws: DNE zesty_linux-aws: DNE devel_linux-aws: DNE Patches_linux-hwe-edge: upstream_linux-hwe-edge: released (4.3~rc1) precise_linux-hwe-edge: DNE precise/esm_linux-hwe-edge: DNE trusty_linux-hwe-edge: DNE trusty/esm_linux-hwe-edge: DNE vivid/ubuntu-core_linux-hwe-edge: DNE vivid/stable-phone-overlay_linux-hwe-edge: DNE xenial_linux-hwe-edge: not-affected (4.8.0-36.36~16.04.1) esm-infra/xenial_linux-hwe-edge: not-affected (4.8.0-36.36~16.04.1) yakkety_linux-hwe-edge: DNE zesty_linux-hwe-edge: DNE devel_linux-hwe-edge: DNE Patches_linux-hwe: upstream_linux-hwe: released (4.3~rc1) precise_linux-hwe: DNE precise/esm_linux-hwe: DNE trusty_linux-hwe: DNE trusty/esm_linux-hwe: DNE vivid/ubuntu-core_linux-hwe: DNE vivid/stable-phone-overlay_linux-hwe: DNE xenial_linux-hwe: not-affected (4.8.0-36.36~16.04.1) esm-infra/xenial_linux-hwe: not-affected (4.8.0-36.36~16.04.1) yakkety_linux-hwe: DNE zesty_linux-hwe: DNE devel_linux-hwe: DNE Patches_linux-gke: upstream_linux-gke: released (4.3~rc1) precise_linux-gke: DNE precise/esm_linux-gke: DNE trusty_linux-gke: DNE trusty/esm_linux-gke: DNE vivid/ubuntu-core_linux-gke: DNE vivid/stable-phone-overlay_linux-gke: DNE xenial_linux-gke: not-affected (4.4.0-1003.3) yakkety_linux-gke: DNE zesty_linux-gke: DNE devel_linux-gke: DNE