SB2012062202 - Input validation error in Linux kernel
Published: June 22, 2012 Updated: August 11, 2020
Security Bulletin ID
SB2012062202
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-2011-1080)
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The do_replace function in net/bridge/netfilter/ebtables.c in the Linux kernel before 2.6.39 does not ensure that a certain name field ends with a ' ' character, which allows local users to obtain potentially sensitive information from kernel stack memory by leveraging the CAP_NET_ADMIN capability to replace a table, and then reading a modprobe command line.
Remediation
Install update from vendor's website.
References
- http://downloads.avaya.com/css/P8/documents/100145416
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d846f71195d57b0bbb143382647c2c6638b04c5a
- http://rhn.redhat.com/errata/RHSA-2011-0833.html
- http://www.openwall.com/lists/oss-security/2011/03/01/10
- https://bugzilla.redhat.com/show_bug.cgi?id=681262
- https://github.com/torvalds/linux/commit/d846f71195d57b0bbb143382647c2c6638b04c5a