Resource exhaustion in Xen - CVE-2022-42319
Published: January 2, 2023
Vulnerability identifier: #VU70587
CSH Severity: Medium
CVSS v4.0: 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-2022-42319
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Xen Project
Affected software:
Xen
Xen
Detailed vulnerability description
The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.
The vulnerability exists in Xenstore due to allocated temporary memory is freed only after the request is completely finished. A malicious guest can allocate large amounts of memory and perform a denial of service (DoS) attack.
How to mitigate CVE-2022-42319
Install updates from vendor's website.
Sources
- https://xenbits.xenproject.org/xsa/advisory-416.txt
- http://xenbits.xen.org/xsa/advisory-416.html
- http://www.openwall.com/lists/oss-security/2022/11/01/6
- 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/