NULL pointer dereference in libvirt

1) NULL pointer dereference

EUVDB-ID: #VU43326

Risk: Medium

CVSSv4.0: 2.7 [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 - NULL Pointer Dereference

Exploit availability: No

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libvirt: 0.0.1 - 0.10.0

CPE2.3

• cpe:2.3:a:libvirt_org:libvirt:0.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:libvirt_org:libvirt:0.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:libvirt_org:libvirt:0.0.3:*:*:*:*:*:*:*

External links

https://libvirt.org/git/?p=libvirt.git;a=commit;h=b7ff9e696063189a715802d081d55a398663c15a
https://libvirt.org/git/?p=libvirt.git;a=commitdiff;h=f8fbeb50d52520a109d71c8566fed2ea600650ec
https://lists.fedoraproject.org/pipermail/package-announce/2012-October/089976.html
https://lists.fedoraproject.org/pipermail/package-announce/2012-October/090121.html
https://lists.opensuse.org/opensuse-security-announce/2013-02/msg00001.html
https://rhn.redhat.com/errata/RHSA-2012-1359.html
https://www.openwall.com/lists/oss-security/2012/09/13/14
https://www.securityfocus.com/bid/55541
https://www.securitytracker.com/id?1027649
https://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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.