#VU42208 Permissions, Privileges, and Access Controls in Xen - CVE-2013-4554

Vulnerability identifier: #VU42208

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2013-4554

CWE-ID: CWE-264

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 read and manipulate data.

Xen 3.0.3 through 4.1.x (possibly 4.1.6.1), 4.2.x (possibly 4.2.3), and 4.3.x (possibly 4.3.1) does not properly prevent access to hypercalls, which allows local guest users to gain privileges via a crafted application running in ring 1 or 2.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 3.0.3 - 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/msg00015.html
https://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
https://lists.opensuse.org/opensuse-security-announce/2014-04/msg00000.html
https://lists.opensuse.org/opensuse-updates/2013-12/msg00059.html
https://rhn.redhat.com/errata/RHSA-2014-0285.html
https://security.gentoo.org/glsa/glsa-201407-03.xml
https://www.openwall.com/lists/oss-security/2013/11/26/9

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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.