SB2012061309 - Input validation error in Linux kernel
Published: June 13, 2012 Updated: August 11, 2020
Security Bulletin ID
SB2012061309
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2012-2375)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The __nfs4_get_acl_uncached function in fs/nfs/nfs4proc.c in the NFSv4 implementation in the Linux kernel before 3.3.2 uses an incorrect length variable during a copy operation, which allows remote NFS servers to cause a denial of service (OOPS) by sending an excessive number of bitmap words in an FATTR4_ACL reply. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-4131.
Remediation
Install update from vendor's website.
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=20e0fa98b751facf9a1101edaefbc19c82616a68
- http://marc.info/?l=bugtraq&m=139447903326211&w=2
- http://rhn.redhat.com/errata/RHSA-2012-1580.html
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.2
- http://www.openwall.com/lists/oss-security/2012/05/18/13
- https://bugzilla.redhat.com/show_bug.cgi?id=822869
- https://github.com/torvalds/linux/commit/20e0fa98b751facf9a1101edaefbc19c82616a68