CVE-2014-4014

Published: 23 June 2014

The capabilities implementation in the Linux kernel before 3.14.8 does not properly consider that namespaces are inapplicable to inodes, which allows local users to bypass intended chmod restrictions by first creating a user namespace, as demonstrated by setting the setgid bit on a file with group ownership of root.

From the Ubuntu security team

A flaw was discovered in the Linux kernel's implementation of user namespaces with respect to inode permissions. A local user could exploit this flaw by creating a user namespace to gain administrative privileges.

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
Patches:
Introduced by 1a48e2ac034d47ed843081c4523b63c46b46888b
Fixed by 23adbe12ef7d3d4195e80800ab36b37bee28cd03
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (3.16~rc1)

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

References

Bugs