NULL pointer dereference in libvirt - CVE-2012-4423
Published: November 19, 2012 / Updated: April 1, 2021
Vulnerability identifier: #VU43326
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2012-4423
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: libvirt.org
Affected software:
libvirt
libvirt
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via an RPC call with (1) an event as the RPC number or (2) an RPC number whose value is in a "gap" in the RPC dispatch table.
How to mitigate CVE-2012-4423
Install update from vendor's website.
Sources
- http://libvirt.org/git/?p=libvirt.git;a=commit;h=b7ff9e696063189a715802d081d55a398663c15a
- http://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=f8fbeb50d52520a109d71c8566fed2ea600650ec
- http://lists.fedoraproject.org/pipermail/package-announce/2012-October/089976.html
- http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090121.html
- http://lists.opensuse.org/opensuse-security-announce/2013-02/msg00001.html
- http://rhn.redhat.com/errata/RHSA-2012-1359.html
- http://www.openwall.com/lists/oss-security/2012/09/13/14
- http://www.securityfocus.com/bid/55541
- http://www.securitytracker.com/id?1027649
- http://www.ubuntu.com/usn/USN-1708-1
- https://bugzilla.redhat.com/show_bug.cgi?id=857133
- https://www.redhat.com/archives/libvir-list/2012-September/msg00843.html