CVE-2014-7970

Published: 13 October 2014

The pivot_root implementation in fs/namespace.c in the Linux kernel through 3.17 does not properly interact with certain locations of a chroot directory, which allows local users to cause a denial of service (mount-tree loop) via . (dot) values in both arguments to the pivot_root system call.

From the Ubuntu security team

Andy Lutomirski discovered a flaw in how the Linux kernel handles pivot_root when used with a chroot directory. A local user could exploit this flaw to cause a denial of service (mount-tree loop).

Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by 0d0826019e529f21c84687521d03f60cd241ca7d
linux-2.6
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (3.18~rc1)

Notes

AuthorNote
jdstrand
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.04 preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

References

Bugs