#VU73895 Permissions, Privileges, and Access Controls in Xen - CVE-2022-42334

Vulnerability identifier: #VU73895

Vulnerability risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-42334

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows an attacker to perform a denial of service attack or escalate privileges on the system.

The vulnerability exists due to mishandling of pinned cache attributes, related to improper serialization of installation and removal of regions. An attacker controlling HVM guests can perform a denial of service (DoS) attack and potentially escalate privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Xen: All versions

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External links
https://xenbits.xenproject.org/xsa/advisory-428.txt
https://xenbits.xen.org/xsa/advisory-428.html
https://www.openwall.com/lists/oss-security/2023/03/21/2

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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