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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

Medium

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)