#VU43298 Input validation error in Xen - CVE-2012-6030

Vulnerability identifier: #VU43298

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2012-6030

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 execute arbitrary code.

The do_tmem_op function in the Transcendent Memory (TMEM) in Xen 4.0, 4.1, and 4.2 allow local guest OS users to cause a denial of service (host crash) and possibly have other unspecified impacts via unspecified vectors related to "broken locking checks" in an "error path." NOTE: this issue was originally published as part of CVE-2012-3497, which was too general; CVE-2012-3497 has been SPLIT into this ID and others.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.0.0 - 4.2.0

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External links
https://lists.xen.org/archives/html/xen-announce/2012-09/msg00006.html
https://osvdb.org/85199
https://secunia.com/advisories/50472
https://secunia.com/advisories/55082
https://security.gentoo.org/glsa/glsa-201309-24.xml
https://wiki.xen.org/wiki/Security_Announcements#XSA-15_multiple_TMEM_hypercall_vulnerabilities
https://www.openwall.com/lists/oss-security/2012/09/05/8
https://www.securityfocus.com/bid/55410
https://www.securitytracker.com/id?1027482
https://exchange.xforce.ibmcloud.com/vulnerabilities/78268
https://security.gentoo.org/glsa/201604-03

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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.