#VU81903 State Issues in Xen - CVE-2023-34328

Vulnerability identifier: #VU81903

Vulnerability risk: Medium

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

CVE-ID: CVE-2023-34328

CWE-ID: CWE-371

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Xen

Software vendor:
Xen Project

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to improper validation of guest state in PV vCPU. A malicious guest place a breakpoint over the live GDT and perform a denial of service (DoS) attack against the host.

Install updates from vendor's website.

• https://xenbits.xen.org/xsa/advisory-444.html