#VU42175 NULL pointer dereference in libvirt - CVE-2013-6436

Vulnerability identifier: #VU42175

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2013-6436

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
libvirt
Universal components / Libraries / Libraries used by multiple products

Vendor: libvirt.org

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 a guest in the shutdown status, as demonstrated by the "virsh memtune" command.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libvirt: 1.0.5 - 1.2.0

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External links
https://libvirt.org/git/?p=libvirt.git;a=commit;h=f8c1cb90213508c4f32549023b0572ed774e48aa
https://lists.opensuse.org/opensuse-updates/2014-01/msg00004.html
https://osvdb.org/101485
https://secunia.com/advisories/56245
https://secunia.com/advisories/60895
https://security.gentoo.org/glsa/glsa-201412-04.xml
https://www.ubuntu.com/usn/USN-2093-1
https://www.redhat.com/archives/libvir-list/2013-December/msg01170.html

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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