Vulnerability identifier: #VU7949

Vulnerability risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-12135

CWE-ID: CWE-264

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description
The vulnerability allows a local attacker on the guest system to gain elevated privileges on the host system.

The weakness exists due to flaws in the processing of transitive grants. A local attacker on the guest system can escalate privileges on the host system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.5.0 - 4.9.0

---

External links
http://xenbits.xen.org/xsa/advisory-226.html

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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