CVE-2011-2495

Published: 3 October 2011

fs/proc/base.c in the Linux kernel before 2.6.39.4 does not properly restrict access to /proc/#####/io files, which allows local users to obtain sensitive I/O statistics by polling a file, as demonstrated by discovering the length of another user's password.

From the Ubuntu Security Team

Vasiliy Kulikov discovered that /proc/PID/io did not enforce access restrictions. A local attacker could exploit this to read certain information, leading to a loss of privacy.

Priority

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	hardy	Released (2.6.24-29.95)
	lucid	Released (2.6.32-35.78)
	maverick	Released (2.6.35-30.61)
	natty	Released (2.6.38-13.52)
	oneiric	Not vulnerable (3.0.0-8.10)
	upstream	Released (3.1~rc1)
	Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by 1d1221f375c94ef961ba8574ac4f85c8870ddd51 Introduced by d84f4f992cbd76e8f39c488cf0c5d123843923b1 Fixed by 293eb1e7772b25a93647c798c7b89bf26c2da2e0
linux-ec2 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.32-319.39)
	maverick	Ignored (binary supplied by "linux" now)
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-fsl-imx51 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.31-611.29)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-lts-backport-maverick Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.35-30.61~lucid1)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-lts-backport-natty Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.38-13.52~lucid1)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-lts-backport-oneiric Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Not vulnerable
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-mvl-dove Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.32-219.37)
	maverick	Released (2.6.32-419.37)
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-ti-omap4 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Does not exist
	maverick	Released (2.6.35-903.26)
	natty	Released (2.6.38-1209.17)
	oneiric	Not vulnerable (3.0.0-1201.4)
	upstream	Released (3.1~rc1)

References

Bugs

https://launchpad.net/bugs/866025

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