SB2023012541 - Denial of service in Xenstore via soft reset
Published: January 25, 2023
Security Bulletin ID
SB2023012541
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) Resource management error (CVE-ID: CVE-2022-42330)
The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.
The vulnerability exists due to an error when performing Soft Reset with kexec. A malicious guest can continuously execute kexec and prevent further domain administration, like starting new guests or adding/removing resources to or from any existing guest.
Remediation
Install update from vendor's website.