CVE-2011-2495

Linux Kernel < 2.6.39.4 - Unauthorized Sensitive I/O Statistics Exposure via /proc/#####/io

Title source: llm

Description

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.

References (6)

Core 6

Core References

Patch x_refsource_confirm

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1d1221f375c94ef961ba8574ac4f85c8870ddd51

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2011-1212.html

Mailing List mailing-list x_refsource_mlist

http://www.openwall.com/lists/oss-security/2011/06/27/1

Various Sources x_refsource_confirm

http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.4

Exploit, Patch x_refsource_confirm

https://github.com/torvalds/linux/commit/1d1221f375c94ef961ba8574ac4f85c8870ddd51

Issue Tracking x_refsource_confirm

https://bugzilla.redhat.com/show_bug.cgi?id=716825

Scores

EPSS 0.0048

EPSS Percentile 39.2%

Details

CWE

CWE-264

Status published

Products (4)

linux/linux_kernel 2.6.39 (8 CPE variants)

linux/linux_kernel 2.6.39.1

linux/linux_kernel 2.6.39.2

linux/linux_kernel < 2.6.39.3

Published Jun 13, 2012

Tracked Since Feb 18, 2026