SB2023010303 - Denial of service in Xen Oxenstored
Published: January 3, 2023
Security Bulletin ID
SB2023010303
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Infinite loop (CVE-ID: CVE-2022-42324)
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.
Remediation
Install update from vendor's website.
References
- 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/