Vulnerability identifier: #VU46979

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25596

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

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

The vulnerability exists due to improper management of internal resources within guest VM when processing state sanitization activities. A local user or application on the guest operating system can abuse SYSENTER to cause a crash of the guest VM.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Xen: 3.2 - 4.14.0

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External links
http://xenbits.xen.org/xsa/advisory-339.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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