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CVE-2012-2123

Published: 19 April 2012

The cap_bprm_set_creds function in security/commoncap.c in the Linux kernel before 3.3.3 does not properly handle the use of file system capabilities (aka fcaps) for implementing a privileged executable file, which allows local users to bypass intended personality restrictions via a crafted application, as demonstrated by an attack that uses a parent process to disable ASLR.

From the Ubuntu security team

Steve Grubb reported a flaw with Linux fscaps (file system base capabilities) when used to increase the permissions of a process. For application on which fscaps are in use a local attacker can disable address space randomization to make attacking the process with raised privileges easier.

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by d52fc5dde171f030170a6cb78034d166b13c9445
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-lts-backport-maverick
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-lts-backport-natty
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-lts-backport-oneiric
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (3.4~rc4)