#VU81886 Stack-based buffer overflow in Xen - CVE-2023-34325

Vulnerability identifier: #VU81886

Vulnerability risk: High

CVSSv4.0: 2.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:U/U:Amber]

CVE-ID: CVE-2023-34325

CWE-ID: CWE-121

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 insufficient validation of user-supplied input in libfsimage. A remote guest can use pygrab to trigger stack-based buffer overflow and execute arbitrary code on the host system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Xen: All versions

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External links
https://xenbits.xen.org/xsa/advisory-443.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.