Vulnerability identifier: #VU81883

Vulnerability risk: Medium

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-34326

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a remote guest to escalate privileges on the system.

The vulnerability exists due to missing IOMMU TLB flushing on x86/AMD systems. A malicious guest can access memory not owned by the guest and escalate privileges on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Xen: All versions

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External links
http://xenbits.xen.org/xsa/advisory-442.html

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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