SB2020092335 - Resource management error in xen (Alpine package)
Published: September 23, 2020
Security Bulletin ID
SB2020092335
Severity
Medium
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-2020-25597)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due a login error in the handling of event channel operations in Xen, which assumes that an event channel, once valid, will not become invalid over the life time of a guest.An unprivileged guest may be able to crash Xen by resetting of all event channels.
Remediation
Install update from vendor's website.