Vulnerability identifier: #VU32221

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-2016-9378

CWE-ID: CWE-284

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.

Xen 4.5.x through 4.7.x on AMD systems without the NRip feature, when emulating instructions that generate software interrupts, allows local HVM guest OS users to cause a denial of service (guest crash) by leveraging an incorrect choice for software interrupt delivery.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.5.0 - 4.5.5

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External links
http://www.securityfocus.com/bid/94475
http://www.securitytracker.com/id/1037345
http://xenbits.xen.org/xsa/advisory-196.html
http://security.gentoo.org/glsa/201612-56

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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.