Access Restriction Bypass Affecting perf package, versions <0:2.6.32-131.12.1.el6


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-CENTOS6-PERF-2048487
  • published26 Jul 2021
  • disclosed21 Jun 2011

Introduced: 21 Jun 2011

CVE-2011-2495  (opens in a new tab)
CWE-264  (opens in a new tab)

How to fix?

Upgrade Centos:6 perf to version 0:2.6.32-131.12.1.el6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by Centos. See How to fix? for Centos:6 relevant fixed versions and status.

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.

CVSS Scores

version 3.1