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CVE-2013-1956

Published: 24 April 2013

The create_user_ns function in kernel/user_namespace.c in the Linux kernel before 3.8.6 does not check whether a chroot directory exists that differs from the namespace root directory, which allows local users to bypass intended filesystem restrictions via a crafted clone system call.

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by 3151527ee007b73a0ebd296010f1c0454a919c7d
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-lts-backport-maverick
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-lts-backport-oneiric
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (3.9~rc5)

Notes

AuthorNote
henrix
According to the author of the fix[1], kernels older than 3.8 simply
not enough things were converted for most people to build a kernel
with user namespaces enabled.
[1] https://lkml.org/lkml/2013/10/22/349

References

Bugs