CVE-2015-1328

Published: 15 June 2015

The overlayfs implementation in the linux (aka Linux kernel) package before 3.19.0-21.21 in Ubuntu through 15.04 does not properly check permissions for file creation in the upper filesystem directory, which allows local users to obtain root access by leveraging a configuration in which overlayfs is permitted in an arbitrary mount namespace.

From the Ubuntu security team

Philip Pettersson discovered a privilege escalation when using overlayfs mounts inside of user namespaces. A local user could exploit this flaw to gain administrative privileges on the system.

Priority

High

CVSS 3 base score: 7.8

Status

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

Patches:
Introduced by local-2015-1328-break
Fixed by local-2015-1328-fix
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

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

linux-ec2
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-flo
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-gke
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-goldfish
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-grouper
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-hwe
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-maguro
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-mako
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-manta
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-raspi2
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream Not vulnerable

Notes

AuthorNote
tyhicks
This CVE is specific to Ubuntu since Ubuntu allows overlayfs mounts
inside of user namespaces
jdstrand
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.10 and earlier preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

References

Bugs