#VU42522 Buffer overflow in libvirt - CVE-2013-5651

Vulnerability identifier: #VU42522

Vulnerability 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-2013-5651

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

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

Vendor: libvirt.org

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The virBitmapParse function in util/virbitmap.c in libvirt before 1.1.2 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via a crafted bitmap, as demonstrated by a large nodeset value to numatune.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libvirt: 0.0.1 - 1.1.0

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External links
https://libvirt.org/git/?p=libvirt.git;a=commit;h=47b9127e883677a0d60d767030a147450e919a25
https://libvirt.org/news.html
https://lists.opensuse.org/opensuse-updates/2013-10/msg00024.html
https://secunia.com/advisories/60895
https://security.gentoo.org/glsa/glsa-201412-04.xml
https://www.openwall.com/lists/oss-security/2013/08/30/1
https://www.ubuntu.com/usn/USN-1954-1
https://bugzilla.redhat.com/show_bug.cgi?id=997367

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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.