SB2011071902 - Input validation error in Linux kernel
Published: July 19, 2011 Updated: August 11, 2020
Security Bulletin ID
SB2011071902
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) Input validation error (CVE-ID: CVE-2011-0726)
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The do_task_stat function in fs/proc/array.c in the Linux kernel before 2.6.39-rc1 does not perform an expected uid check, which makes it easier for local users to defeat the ASLR protection mechanism by reading the start_code and end_code fields in the /proc/#####/stat file for a process executing a PIE binary.
Remediation
Install update from vendor's website.
References
- http://downloads.avaya.com/css/P8/documents/100145416
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5883f57ca0008ffc93e09cbb9847a1928e50c6f3
- http://rhn.redhat.com/errata/RHSA-2011-0833.html
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/v2.6.39/ChangeLog-2.6.39-rc1
- http://www.securityfocus.com/bid/47791
- http://www.spinics.net/lists/mm-commits/msg82726.html
- https://bugzilla.redhat.com/show_bug.cgi?id=684569
- https://lkml.org/lkml/2011/3/11/380