#VU42339 Permissions, Privileges, and Access Controls in Xen and Opensuse - CVE-2013-6375

Vulnerability identifier: #VU42339

Vulnerability risk: High

CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2013-6375

CWE-ID: CWE-264

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software
Opensuse
Operating systems & Components / Operating system

Vendor: Xen Project
SUSE

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Xen 4.2.x and 4.3.x, when using Intel VT-d for PCI passthrough, does not properly flush the TLB after clearing a present translation table entry, which allows local guest administrators to cause a denial of service or gain privileges via unspecified vectors related to an "inverted boolean parameter."

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.2.1 - 4.3.1

Opensuse: 4.2.1 - 13.1

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External links
https://lists.opensuse.org/opensuse-updates/2013-12/msg00059.html
https://security.gentoo.org/glsa/glsa-201407-03.xml
https://www.openwall.com/lists/oss-security/2013/11/20/3
https://www.openwall.com/lists/oss-security/2013/11/21/1
https://www.securitytracker.com/id/1029369

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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