#VU42207 Buffer overflow in Xen - CVE-2013-4553

Vulnerability identifier: #VU42207

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2013-4553

CWE-ID: CWE-119

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a remote #AU# to perform a denial of service (DoS) attack.

The XEN_DOMCTL_getmemlist hypercall in Xen 3.4.x through 4.3.x (possibly 4.3.1) does not always obtain the page_alloc_lock and mm_rwlock in the same order, which allows local guest administrators to cause a denial of service (host deadlock).

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 3.4.0 - 4.3.1

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External links
https://lists.opensuse.org/opensuse-security-announce/2014-03/msg00010.html
https://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
https://lists.opensuse.org/opensuse-updates/2013-12/msg00059.html
https://security.gentoo.org/glsa/glsa-201407-03.xml
https://www.debian.org/security/2014/dsa-3006
https://www.openwall.com/lists/oss-security/2013/11/26/8

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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