Input validation error in Linux kernel - CVE-2011-4131
Published: May 17, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU44078
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2011-4131
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The NFSv4 implementation in the Linux kernel before 3.2.2 does not properly handle bitmap sizes in GETACL replies, which allows remote NFS servers to cause a denial of service (OOPS) by sending an excessive number of bitmap words.
How to mitigate CVE-2011-4131
Install update from vendor's website.
Sources
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=bf118a342f10dafe44b14451a1392c3254629a1f
- http://lists.fedoraproject.org/pipermail/package-announce/2012-May/081280.html
- http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
- http://rhn.redhat.com/errata/RHSA-2012-0862.html
- http://rhn.redhat.com/errata/RHSA-2012-1541.html
- http://secunia.com/advisories/48898
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
- http://www.openwall.com/lists/oss-security/2011/11/12/1
- https://bugzilla.redhat.com/show_bug.cgi?id=747106
- https://github.com/torvalds/linux/commit/bf118a342f10dafe44b14451a1392c3254629a1f