#VU44877 Input validation error in Linux kernel - CVE-2011-0726
Published: July 19, 2011 / Updated: August 11, 2020
Vulnerability identifier: #VU44877
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2011-0726
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
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.
External links
- 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