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CVE-2013-0914

Published: 22 March 2013

The flush_signal_handlers function in kernel/signal.c in the Linux kernel before 3.8.4 preserves the value of the sa_restorer field across an exec operation, which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application containing a sigaction system call.

From the Ubuntu security team

Emese Revfy discovered that in the Linux kernel signal handlers could leak address information across an exec, making it possible to by pass ASLR (Address Space Layout Randomization). A local user could use this flaw to by pass ASLR to reliably deliver an exploit payload that would otherwise be stopped (by ASLR).

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 2ca39528c01a933f6689cd6505ce65bd6d68a530
linux-armadaxp
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-ec2
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-flo
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-gke
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-goldfish
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-grouper
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-hwe
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-hwe-edge
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-linaro-omap
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-linaro-shared
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-lts-backport-maverick
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-lts-backport-oneiric
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-lts-quantal
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-lts-raring
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-lts-trusty
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-lts-utopic
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-lts-vivid
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-lts-wily
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-lts-xenial
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-maguro
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-mako
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-manta
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-mvl-dove
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-qcm-msm
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-raspi2
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-snapdragon
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)
linux-ti-omap4
Launchpad, Ubuntu, Debian
upstream
Released (3.9~rc3)