Incorrect authorization in Xen - CVE-2022-23033

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Main Vulnerability Database Vulnerabilities #VU63797

Incorrect authorization in Xen - CVE-2022-23033

Published: May 30, 2022 / Updated: May 30, 2022


Vulnerability identifier: #VU63797
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2022-23033
CWE-ID: CWE-863
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Xen
Software vendor:
Xen Project

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to guest_physmap_remove_page() function does not remove p2m mappings. A local user issuing a set/way cache maintenance instruction, then calling the XENMEM_decrease_reservation hypercall to give back memory pages to Xen, can cause information leaks, Denial of Service (DoS), or escalate privileges on the system.


Remediation

Install updates from vendor's website.

External links