PublicDateAtUSN: 2014-08-13 Candidate: CVE-2014-5206 PublicDate: 2014-08-18 11:15:00 UTC References: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-5206 http://www.openwall.com/lists/oss-security/2014/08/13/4 https://ubuntu.com/security/notices/USN-2317-1 https://ubuntu.com/security/notices/USN-2318-1 Description: The do_remount function in fs/namespace.c in the Linux kernel through 3.16.1 does not maintain the MNT_LOCK_READONLY bit across a remount of a bind mount, which allows local users to bypass an intended read-only restriction and defeat certain sandbox protection mechanisms via a "mount -o remount" command within a user namespace. Ubuntu-Description: Kenton Varda discovered a flaw with read-only bind mounds when used with user namespaces. An unprivileged local user could exploit this flaw to gain full write privileges to a mount that should be read only. Notes: jdstrand> android kernels (goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 13.10 preview kernels jdstrand> android kernels (flo, goldfish, grouper, maguro, mako and manta) are not supported on the Ubuntu Touch 14.04 preview kernels apw> The existing break-fix appears to point to some self-tests apw> break-fix: - db181ce011e3c033328608299cd6fac06ea50130 apw> actual fix appears to be: a6138db815df5ee542d848318e5dae681590fccd jdstrand> linux-lts-saucy no longer receives official support Bugs: https://launchpad.net/bugs/1356318 Priority: high Discovered-by: Kenton Varda Assigned-to: CVSS: Patches_linux: break-fix: 0c55cfc4166d9a0f38de779bd4d75a90afbe7734 a6138db815df5ee542d848318e5dae681590fccd break-fix: 0c55cfc4166d9a0f38de779bd4d75a90afbe7734 07b645589dcda8b7a5249e096fece2a67556f0f4 upstream_linux: released (3.17~rc1) lucid_linux: not-affected precise_linux: not-affected trusty_linux: released (3.13.0-34.60) trusty/esm_linux: released (3.13.0-34.60) utopic_linux: not-affected (3.16.0-8.13) vivid_linux: not-affected (3.16.0-23.31) vivid/stable-phone-overlay_linux: DNE vivid/ubuntu-core_linux: not-affected (3.16.0-23.31) wily_linux: not-affected (3.19.0-15.15) devel_linux: not-affected (4.2.0-16.19) Patches_linux-ec2: upstream_linux-ec2: released (3.17~rc1) lucid_linux-ec2: not-affected precise_linux-ec2: DNE trusty_linux-ec2: DNE trusty/esm_linux-ec2: DNE utopic_linux-ec2: DNE vivid_linux-ec2: DNE vivid/stable-phone-overlay_linux-ec2: DNE vivid/ubuntu-core_linux-ec2: DNE wily_linux-ec2: DNE devel_linux-ec2: DNE Patches_linux-mvl-dove: upstream_linux-mvl-dove: released (3.17~rc1) lucid_linux-mvl-dove: ignored (reached end-of-life) precise_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/stable-phone-overlay_linux-mvl-dove: DNE vivid/ubuntu-core_linux-mvl-dove: DNE wily_linux-mvl-dove: DNE devel_linux-mvl-dove: DNE Patches_linux-ti-omap4: upstream_linux-ti-omap4: released (3.17~rc1) lucid_linux-ti-omap4: DNE precise_linux-ti-omap4: not-affected trusty_linux-ti-omap4: DNE trusty/esm_linux-ti-omap4: DNE utopic_linux-ti-omap4: DNE vivid_linux-ti-omap4: DNE vivid/stable-phone-overlay_linux-ti-omap4: DNE vivid/ubuntu-core_linux-ti-omap4: DNE wily_linux-ti-omap4: DNE devel_linux-ti-omap4: DNE Patches_linux-fsl-imx51: upstream_linux-fsl-imx51: released (3.17~rc1) lucid_linux-fsl-imx51: ignored (reached end-of-life, does not affect buildd) precise_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/stable-phone-overlay_linux-fsl-imx51: DNE vivid/ubuntu-core_linux-fsl-imx51: DNE wily_linux-fsl-imx51: DNE devel_linux-fsl-imx51: DNE Patches_linux-linaro-omap: upstream_linux-linaro-omap: released (3.17~rc1) lucid_linux-linaro-omap: DNE precise_linux-linaro-omap: ignored (abandoned) trusty_linux-linaro-omap: DNE trusty/esm_linux-linaro-omap: DNE utopic_linux-linaro-omap: DNE vivid_linux-linaro-omap: DNE vivid/stable-phone-overlay_linux-linaro-omap: DNE vivid/ubuntu-core_linux-linaro-omap: DNE wily_linux-linaro-omap: DNE devel_linux-linaro-omap: DNE Patches_linux-linaro-shared: upstream_linux-linaro-shared: released (3.17~rc1) lucid_linux-linaro-shared: DNE precise_linux-linaro-shared: ignored (abandoned) trusty_linux-linaro-shared: DNE trusty/esm_linux-linaro-shared: DNE utopic_linux-linaro-shared: DNE vivid_linux-linaro-shared: DNE vivid/stable-phone-overlay_linux-linaro-shared: DNE vivid/ubuntu-core_linux-linaro-shared: DNE wily_linux-linaro-shared: DNE devel_linux-linaro-shared: DNE Patches_linux-linaro-vexpress: upstream_linux-linaro-vexpress: released (3.17~rc1) lucid_linux-linaro-vexpress: DNE precise_linux-linaro-vexpress: ignored (abandoned) trusty_linux-linaro-vexpress: DNE trusty/esm_linux-linaro-vexpress: DNE utopic_linux-linaro-vexpress: DNE vivid_linux-linaro-vexpress: DNE vivid/stable-phone-overlay_linux-linaro-vexpress: DNE vivid/ubuntu-core_linux-linaro-vexpress: DNE wily_linux-linaro-vexpress: DNE devel_linux-linaro-vexpress: DNE Patches_linux-qcm-msm: upstream_linux-qcm-msm: released (3.17~rc1) lucid_linux-qcm-msm: ignored (abandoned) precise_linux-qcm-msm: ignored (abandoned) trusty_linux-qcm-msm: DNE trusty/esm_linux-qcm-msm: DNE utopic_linux-qcm-msm: DNE vivid_linux-qcm-msm: DNE vivid/stable-phone-overlay_linux-qcm-msm: DNE vivid/ubuntu-core_linux-qcm-msm: DNE wily_linux-qcm-msm: DNE devel_linux-qcm-msm: DNE Tags_linux-armadaxp: not-ue Patches_linux-armadaxp: upstream_linux-armadaxp: released (3.17~rc1) lucid_linux-armadaxp: DNE precise_linux-armadaxp: not-affected trusty_linux-armadaxp: DNE trusty/esm_linux-armadaxp: DNE utopic_linux-armadaxp: DNE vivid_linux-armadaxp: DNE vivid/stable-phone-overlay_linux-armadaxp: DNE vivid/ubuntu-core_linux-armadaxp: DNE wily_linux-armadaxp: DNE devel_linux-armadaxp: DNE Patches_linux-lts-quantal: upstream_linux-lts-quantal: released (3.17~rc1) lucid_linux-lts-quantal: DNE precise_linux-lts-quantal: not-affected trusty_linux-lts-quantal: DNE trusty/esm_linux-lts-quantal: DNE utopic_linux-lts-quantal: DNE vivid_linux-lts-quantal: DNE vivid/stable-phone-overlay_linux-lts-quantal: DNE vivid/ubuntu-core_linux-lts-quantal: DNE wily_linux-lts-quantal: DNE devel_linux-lts-quantal: DNE Patches_linux-lts-raring: upstream_linux-lts-raring: released (3.17~rc1) lucid_linux-lts-raring: DNE precise_linux-lts-raring: 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/stable-phone-overlay_linux-lts-raring: DNE vivid/ubuntu-core_linux-lts-raring: DNE wily_linux-lts-raring: DNE devel_linux-lts-raring: DNE Tags_linux-lts-saucy: not-ue Patches_linux-lts-saucy: upstream_linux-lts-saucy: released (3.17~rc1) lucid_linux-lts-saucy: DNE precise_linux-lts-saucy: ignored (was pending [3.11.0-27.47~precise1] OEM release) trusty_linux-lts-saucy: DNE trusty/esm_linux-lts-saucy: DNE utopic_linux-lts-saucy: DNE vivid_linux-lts-saucy: DNE vivid/stable-phone-overlay_linux-lts-saucy: DNE vivid/ubuntu-core_linux-lts-saucy: DNE wily_linux-lts-saucy: DNE devel_linux-lts-saucy: DNE Patches_linux-lts-trusty: upstream_linux-lts-trusty: released (3.17~rc1) lucid_linux-lts-trusty: DNE precise_linux-lts-trusty: released (3.13.0-34.60~precise1) trusty_linux-lts-trusty: DNE trusty/esm_linux-lts-trusty: DNE utopic_linux-lts-trusty: DNE vivid_linux-lts-trusty: DNE vivid/stable-phone-overlay_linux-lts-trusty: DNE vivid/ubuntu-core_linux-lts-trusty: DNE wily_linux-lts-trusty: DNE devel_linux-lts-trusty: DNE Patches_linux-goldfish: upstream_linux-goldfish: released (3.17~rc1) lucid_linux-goldfish: DNE precise_linux-goldfish: DNE trusty_linux-goldfish: ignored trusty/esm_linux-goldfish: DNE (trusty was ignored) utopic_linux-goldfish: not-affected vivid_linux-goldfish: not-affected vivid/stable-phone-overlay_linux-goldfish: DNE vivid/ubuntu-core_linux-goldfish: DNE wily_linux-goldfish: not-affected devel_linux-goldfish: not-affected Patches_linux-grouper: upstream_linux-grouper: released (3.17~rc1) lucid_linux-grouper: DNE precise_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/stable-phone-overlay_linux-grouper: DNE vivid/ubuntu-core_linux-grouper: DNE wily_linux-grouper: DNE devel_linux-grouper: DNE Patches_linux-maguro: upstream_linux-maguro: released (3.17~rc1) lucid_linux-maguro: DNE precise_linux-maguro: DNE trusty_linux-maguro: ignored trusty/esm_linux-maguro: DNE (trusty was ignored) utopic_linux-maguro: DNE vivid_linux-maguro: DNE vivid/stable-phone-overlay_linux-maguro: DNE vivid/ubuntu-core_linux-maguro: DNE wily_linux-maguro: DNE devel_linux-maguro: DNE Patches_linux-mako: upstream_linux-mako: released (3.17~rc1) lucid_linux-mako: DNE precise_linux-mako: DNE trusty_linux-mako: ignored trusty/esm_linux-mako: DNE (trusty was ignored) utopic_linux-mako: not-affected vivid_linux-mako: not-affected vivid/stable-phone-overlay_linux-mako: not-affected vivid/ubuntu-core_linux-mako: DNE wily_linux-mako: not-affected devel_linux-mako: not-affected Patches_linux-manta: upstream_linux-manta: released (3.17~rc1) lucid_linux-manta: DNE precise_linux-manta: DNE trusty_linux-manta: ignored trusty/esm_linux-manta: DNE (trusty was ignored) utopic_linux-manta: not-affected vivid_linux-manta: not-affected vivid/stable-phone-overlay_linux-manta: DNE vivid/ubuntu-core_linux-manta: DNE wily_linux-manta: not-affected devel_linux-manta: not-affected Patches_linux-flo: upstream_linux-flo: released (3.17~rc1) lucid_linux-flo: DNE precise_linux-flo: DNE trusty_linux-flo: ignored trusty/esm_linux-flo: DNE (trusty was ignored) utopic_linux-flo: not-affected vivid_linux-flo: not-affected vivid/stable-phone-overlay_linux-flo: not-affected vivid/ubuntu-core_linux-flo: DNE wily_linux-flo: not-affected devel_linux-flo: not-affected Patches_linux-lts-utopic: upstream_linux-lts-utopic: released (3.17~rc1) lucid_linux-lts-utopic: DNE precise_linux-lts-utopic: DNE trusty_linux-lts-utopic: not-affected (3.16.0-25.33~14.04.2) trusty/esm_linux-lts-utopic: DNE (trusty was not-affected [3.16.0-25.33~14.04.2]) utopic_linux-lts-utopic: DNE vivid_linux-lts-utopic: DNE vivid/stable-phone-overlay_linux-lts-utopic: DNE vivid/ubuntu-core_linux-lts-utopic: DNE wily_linux-lts-utopic: DNE devel_linux-lts-utopic: DNE Patches_linux-lts-vivid: upstream_linux-lts-vivid: released (3.17~rc1) lucid_linux-lts-vivid: DNE precise_linux-lts-vivid: DNE trusty_linux-lts-vivid: not-affected (3.19.0-18.18~14.04.1) trusty/esm_linux-lts-vivid: DNE (trusty was not-affected [3.19.0-18.18~14.04.1]) utopic_linux-lts-vivid: DNE vivid_linux-lts-vivid: DNE vivid/stable-phone-overlay_linux-lts-vivid: DNE vivid/ubuntu-core_linux-lts-vivid: DNE wily_linux-lts-vivid: DNE devel_linux-lts-vivid: DNE Patches_linux-raspi2: upstream_linux-raspi2: released (3.17~rc1) precise_linux-raspi2: DNE trusty_linux-raspi2: DNE trusty/esm_linux-raspi2: DNE vivid_linux-raspi2: DNE vivid/stable-phone-overlay_linux-raspi2: DNE vivid/ubuntu-core_linux-raspi2: released (4.2.0-1014.21) wily_linux-raspi2: not-affected (4.2.0-1008.12) devel_linux-raspi2: not-affected (4.2.0-1014.21)