CVE-2011-0726

Published: 11 March 2011

The do_task_stat function in fs/proc/array.c in the Linux kernel before 2.6.39-rc1 does not perform an expected uid check, which makes it easier for local users to defeat the ASLR protection mechanism by reading the start_code and end_code fields in the /proc/#####/stat file for a process executing a PIE binary.

From the Ubuntu Security Team

Kees Cook reported that /proc/pid/stat did not correctly filter certain memory locations. A local attacker could determine the memory layout of processes in an attempt to increase the chances of a successful memory corruption exploit.

Priority

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	dapper	Does not exist
	hardy	Released (2.6.24-29.91)
	karmic	Ignored
	lucid	Released (2.6.32-32.62)
	maverick	Released (2.6.35-29.51)
	natty	Released (2.6.38-8.40)
	upstream	Released (2.6.39~rc1)
	Patches: upstream: http://git.kernel.org/linus/f83ce3e6b02d5e48b3a43b001390e2b58820389d upstream: http://git.kernel.org/linus/5883f57ca0008ffc93e09cbb9847a1928e50c6f3
linux-ec2 Launchpad, Ubuntu, Debian	dapper	Does not exist
	hardy	Does not exist
	karmic	Ignored (reached end-of-life)
	lucid	Released (2.6.32-316.30)
	maverick	Ignored (binary supplied by "linux" now)
	natty	Does not exist
	upstream	Released (2.6.39~rc1)
linux-fsl-imx51 Launchpad, Ubuntu, Debian	dapper	Does not exist
	hardy	Does not exist
	karmic	Ignored (reached end-of-life)
	lucid	Released (2.6.31-610.27)
	maverick	Does not exist
	natty	Does not exist
	upstream	Released (2.6.39~rc1)
linux-lts-backport-maverick Launchpad, Ubuntu, Debian	dapper	Does not exist
	hardy	Does not exist
	karmic	Does not exist
	lucid	Released (2.6.35-30.54~lucid1)
	maverick	Does not exist
	natty	Does not exist
	upstream	Released (2.6.39~rc1)
linux-lts-backport-natty Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Not vulnerable (2.6.38-8.40~lucid1)
	maverick	Does not exist
	natty	Does not exist
	upstream	Released (2.6.39~rc1)
linux-mvl-dove Launchpad, Ubuntu, Debian	dapper	Does not exist
	hardy	Does not exist
	karmic	Ignored (abandonded branch)
	lucid	Released (2.6.32-217.34)
	maverick	Released (2.6.32-417.34)
	natty	Does not exist
	upstream	Released (2.6.39~rc1)
linux-source-2.6.15 Launchpad, Ubuntu, Debian	dapper	Ignored
	hardy	Does not exist
	karmic	Does not exist
	lucid	Does not exist
	maverick	Does not exist
	natty	Does not exist
	upstream	Released (2.6.39~rc1)
linux-ti-omap4 Launchpad, Ubuntu, Debian	dapper	Does not exist
	hardy	Does not exist
	karmic	Does not exist
	lucid	Does not exist
	maverick	Released (2.6.35-903.23)
	natty	Released (2.6.38-1208.11)
	upstream	Released (2.6.39~rc1)

References

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