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CVE-2014-5207

Published: 13 August 2014

fs/namespace.c in the Linux kernel through 3.16.1 does not properly restrict clearing MNT_NODEV, MNT_NOSUID, and MNT_NOEXEC and changing MNT_ATIME_MASK during a remount of a bind mount, which allows local users to gain privileges, interfere with backups and auditing on systems that had atime enabled, or cause a denial of service (excessive filesystem updating) on systems that had atime disabled via a "mount -o remount" command within a user namespace.

From the Ubuntu security team

Eric W. Biederman discovered a flaw with the mediation of mount flags in the Linux kernel's user namespace subsystem. An unprivileged user could exploit this flaw to by-pass mount restrictions, and potentially gain administrative privileges.

Priority

High

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
lucid Not vulnerable

precise Not vulnerable

trusty
Released (3.13.0-34.60)
upstream
Released (3.17~rc1)
utopic Not vulnerable
(3.16.0-8.13)
vivid Not vulnerable
(3.16.0-23.31)
wily Not vulnerable
(3.19.0-15.15)
Patches:
Introduced by

0c55cfc4166d9a0f38de779bd4d75a90afbe7734

Fixed by 9566d6742852c527bf5af38af5cbb878dad75705
Introduced by

0c55cfc4166d9a0f38de779bd4d75a90afbe7734

Fixed by ffbc6f0ead47fa5a1dc9642b0331cb75c20a640e
linux-armadaxp
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Not vulnerable

trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-ec2
Launchpad, Ubuntu, Debian
lucid Not vulnerable

precise Does not exist

trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-flo
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (3.17~rc1)
utopic Not vulnerable

vivid Not vulnerable

wily Not vulnerable

linux-fsl-imx51
Launchpad, Ubuntu, Debian
lucid Ignored
(reached end-of-life, does not affect buildd)
precise Does not exist

trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (3.17~rc1)
utopic Not vulnerable

vivid Not vulnerable

wily Not vulnerable

linux-grouper
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (3.17~rc1)
utopic Ignored
(reached end-of-life)
vivid Does not exist

wily Does not exist

linux-linaro-omap
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(abandoned)
trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(abandoned)
trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(abandoned)
trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Not vulnerable

trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-lts-raring
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(was needs-triage now end-of-life)
trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(was pending [3.11.0-27.47~precise1] OEM release)
trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
lucid Does not exist

precise
Released (3.13.0-34.60~precise1)
trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was not-affected [3.16.0-25.33~14.04.2])
upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-lts-vivid
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was not-affected [3.19.0-18.18~14.04.1])
upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-maguro
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-mako
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (3.17~rc1)
utopic Not vulnerable

vivid Not vulnerable

wily Not vulnerable

linux-manta
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (3.17~rc1)
utopic Not vulnerable

vivid Not vulnerable

wily Not vulnerable

linux-mvl-dove
Launchpad, Ubuntu, Debian
lucid Ignored
(reached end-of-life)
precise Does not exist

trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-qcm-msm
Launchpad, Ubuntu, Debian
lucid Ignored
(abandoned)
precise Ignored
(abandoned)
trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (3.17~rc1)
vivid Does not exist

wily Not vulnerable
(4.2.0-1008.12)
linux-ti-omap4
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Not vulnerable

trusty Does not exist

upstream
Released (3.17~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

Notes

AuthorNote
jdstrand
android kernels (goldfish, grouper, maguro, mako and manta) are not
supported on the Ubuntu Touch 13.10 preview kernels
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.04 preview kernels
seth-arnold
this fix was assigned to CVE-2014-5206: db181ce011e3c033328608299cd6fac06ea50130
jdstrand
linux-lts-saucy no longer receives official support

References