SB2020112439 - Off-by-one in Xen
Published: November 24, 2020 Updated: January 24, 2021
Security Bulletin ID
SB2020112439
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Off-by-one (CVE-ID: CVE-2020-29040)
The vulnerability allows a local authenticated user to execute arbitrary code.
An issue was discovered in Xen through 4.14.x allowing x86 HVM guest OS users to cause a denial of service (stack corruption), cause a data leak, or possibly gain privileges because of an off-by-one error. NOTE: this issue is caused by an incorrect fix for CVE-2020-27671.
Remediation
Install update from vendor's website.