Vulnerability identifier: #VU32957

Vulnerability risk: Medium

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-0231

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The pciback_enable_msi function in the PCI backend driver (drivers/xen/pciback/conf_space_capability_msi.c) in Xen for the Linux kernel 2.6.18 and 3.8 allows guest OS users with PCI device access to cause a denial of service via a large number of kernel log messages

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 3.0 - 3.2.3

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External links
http://lists.opensuse.org/opensuse-security-announce/2013-03/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2013-04/msg00018.html
http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
http://osvdb.org/89903
http://secunia.com/advisories/52059
http://www.debian.org/security/2013/dsa-2632
http://www.openwall.com/lists/oss-security/2013/02/05/9
http://www.securityfocus.com/bid/57740
http://exchange.xforce.ibmcloud.com/vulnerabilities/81923

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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.