Infinite loop in Xen - CVE-2022-42324
Published: January 3, 2023
Vulnerability identifier: #VU70614
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2022-42324
CWE-ID: CWE-835
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 due to an integer truncation issue. A malicious guest can write a packet into the xenstore ring which causes 32-bit builds of oxenstored to busy loop, resulting in a denial of service condition.
How to mitigate CVE-2022-42324
Install updates from vendor's website.
Sources
- https://xenbits.xenproject.org/xsa/advisory-420.txt
- http://xenbits.xen.org/xsa/advisory-420.html
- http://www.openwall.com/lists/oss-security/2022/11/01/10
- 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/