Vulnerability identifier: #VU41882

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-2599

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The HVMOP_set_mem_access HVM control operations in Xen 4.1.x for 32-bit and 4.1.x through 4.4.x for 64-bit allow local guest administrators to cause a denial of service (CPU consumption) by leveraging access to certain service domains for HVM guests and a large input.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.1.0 - 4.4.0

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External links
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html
http://security.gentoo.org/glsa/glsa-201407-03.xml
http://www.debian.org/security/2014/dsa-3006
http://www.openwall.com/lists/oss-security/2014/03/25/1
http://www.openwall.com/lists/oss-security/2014/03/25/2
http://www.securityfocus.com/bid/66407
http://www.securitytracker.com/id/1029956
http://xenbits.xen.org/xsa/advisory-89.html

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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.