SB2012070318 - Buffer overflow in Linux kernel
Published: July 3, 2012 Updated: August 11, 2020
Security Bulletin ID
SB2012070318
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Buffer overflow (CVE-ID: CVE-2011-4086)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The journal_unmap_buffer function in fs/jbd2/transaction.c in the Linux kernel before 3.3.1 does not properly handle the _Delay and _Unwritten buffer head states, which allows local users to cause a denial of service (system crash) by leveraging the presence of an ext4 filesystem that was mounted with a journal.
Remediation
Install update from vendor's website.
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=15291164b22a357cb211b618adfef4fa82fc0de3
- http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
- http://rhn.redhat.com/errata/RHSA-2012-0571.html
- http://rhn.redhat.com/errata/RHSA-2012-0670.html
- http://secunia.com/advisories/48898
- http://secunia.com/advisories/48964
- http://www.debian.org/security/2012/dsa-2469
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.1
- https://bugzilla.redhat.com/show_bug.cgi?id=749143
- https://github.com/torvalds/linux/commit/15291164b22a357cb211b618adfef4fa82fc0de3