#VU41716 Permissions, Privileges, and Access Controls in Xen - CVE-2014-3124

Vulnerability identifier: #VU41716

Vulnerability risk: Medium

CVSSv4.0: 4.5 [CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2014-3124

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 #BASIC_IMPACT#.

The HVMOP_set_mem_type control in Xen 4.1 through 4.4.x allows local guest HVM administrators to cause a denial of service (hypervisor crash) or possibly execute arbitrary code by leveraging a separate qemu-dm vulnerability to trigger invalid page table translations for unspecified memory page types.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.1.0 - 4.4.0

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External links
https://lists.fedoraproject.org/pipermail/package-announce/2014-May/133148.html
https://lists.fedoraproject.org/pipermail/package-announce/2014-May/133191.html
https://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.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/2014/04/29/1
https://www.openwall.com/lists/oss-security/2014/04/30/10
https://www.securityfocus.com/bid/67113
https://www.securitytracker.com/id/1030160
https://xenbits.xen.org/xsa/advisory-92.html

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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.