#VU70582 Resource exhaustion in Xen - CVE-2022-42326
Published: January 2, 2023 / Updated: January 2, 2023
Vulnerability identifier: #VU70582
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Green
CVE-ID: CVE-2022-42326
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Xen
Xen
Software vendor:
Xen Project
Xen Project
Description
The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.
The vulnerability exists due to missing control over the number of created nodes in Xenstore. A malicious guest can consume all available memory resources by created an unlimited number of nodes.
The vulnerability affects the C variant of Xenstore (e.g. xenstored and xenstore-stubdom).
Remediation
Install updates from vendor's website.
External links
- https://xenbits.xenproject.org/xsa/advisory-421.txt
- http://xenbits.xen.org/xsa/advisory-421.html
- http://www.openwall.com/lists/oss-security/2022/11/01/11
- https://www.debian.org/security/2022/dsa-5272
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/