SB2013120913 - Input validation error in Linux kernel
Published: December 9, 2013 Updated: August 10, 2020
Security Bulletin ID
SB2013120913
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2013-4270)
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
The net_ctl_permissions function in net/sysctl_net.c in the Linux kernel before 3.11.5 does not properly determine uid and gid values, which allows local users to bypass intended /proc/sys/net restrictions via a crafted application.
Remediation
Install update from vendor's website.
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2433c8f094a008895e66f25bd1773cdb01c91d01
- http://rhn.redhat.com/errata/RHSA-2014-0100.html
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.11.5
- http://www.ubuntu.com/usn/USN-2049-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1027752
- https://github.com/torvalds/linux/commit/2433c8f094a008895e66f25bd1773cdb01c91d01