#VU73892 Processor optimization removal or modification of security-critical code in Xen - CVE-2022-42331
Published: March 21, 2023
Vulnerability identifier: #VU73892
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2022-42331
CWE-ID: CWE-1037
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Xen
Xen
Software vendor:
Xen Project
Xen Project
Description
The vulnerability allows an attacker to escalate privileges on the system.
The vulnerability exists due to an oversight in the very original Spectre/Meltdown security work (XSA-254) caused by an unprotected RET instruction. An attacker with access to the guest OS can infer the contents of arbitrary host memory, including memory assigned to other guests.
Remediation
Install updates from vendor's website.