Vulnerability identifier: #VU32184

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-10025

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a local authenticated user to perform a denial of service (DoS) attack.

VMFUNC emulation in Xen 4.6.x through 4.8.x on x86 systems using AMD virtualization extensions (aka SVM) allows local HVM guest OS users to cause a denial of service (hypervisor crash) by leveraging a missing NULL pointer check.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.6.0 - 4.6.6

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External links
http://www.securityfocus.com/bid/95026
http://www.securitytracker.com/id/1037518
http://xenbits.xen.org/xsa/advisory-203.html
http://support.citrix.com/article/CTX219378

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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