Vulnerability identifier: #VU41658

Vulnerability risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2014-3714

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 #BASIC_IMPACT#.

The ARM image loading functionality in Xen 4.4.x does not properly validate kernel length, which allows local users to read system memory or cause a denial of service (crash) via a crafted 32-bit ARM guest kernel in an image, which triggers a buffer overflow.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.4.0

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External links
http://www.openwall.com/lists/oss-security/2014/05/14/4
http://www.openwall.com/lists/oss-security/2014/05/15/6
http://www.openwall.com/lists/oss-security/2014/05/16/1
http://www.securitytracker.com/id/1030252
http://xenbits.xen.org/xsa/advisory-95.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.