Privilege escalation in Xen



Published: 2023-04-25
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-42335
CWE-ID CWE-822
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		Xen
Server applications / Virtualization software

Vendor Xen Project

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Untrusted Pointer Dereference

EUVDB-ID: #VU75481

Risk: Medium

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-42335

CWE-ID: CWE-822 - Untrusted Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to an arbitrary pointer dereference. A malicious guest running in shadow mode and having a PCI device passed through can execute arbitrary code on the hypervisor.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Xen: 4.17.0

External links

http://xenbits.xen.org/xsa/advisory-430.html


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.



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