SB2012061307 - Permissions, Privileges, and Access Controls in Linux kernel
Published: June 13, 2012 Updated: August 11, 2020
Security Bulletin ID
SB2012061307
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2011-2495)
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
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.
Remediation
Install update from vendor's website.
References
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.4
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=1d1221f375c94ef961ba8574ac4f85c8870ddd51
- http://rhn.redhat.com/errata/RHSA-2011-1212.html
- http://www.openwall.com/lists/oss-security/2011/06/27/1
- https://bugzilla.redhat.com/show_bug.cgi?id=716825
- https://github.com/torvalds/linux/commit/1d1221f375c94ef961ba8574ac4f85c8870ddd51