Vulnerability identifier: #VU16562

Vulnerability risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-19962

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 an adjacent attacker to gain elevated privileges on the target system.

The weakness exists on AMD x86 platforms due to small IOMMU mappings are unsafely combined into larger ones. An adjacent attacker can gain host OS privileges.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Xen: 4.7.0 - 4.11.0

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External links
http://xenbits.xen.org/xsa/advisory-275.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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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