Improper access control in Xen

1) Improper access control

EUVDB-ID: #VU32221

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 - Improper Access Control

Exploit availability: No

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

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

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.