SB2021112408 - Privilege escalation in Xen
Published: November 24, 2021
Security Bulletin ID
SB2021112408
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-28703)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote authenticated attacker to escalate privileges on the system.
The vulnerability exists due to grant table v2 status pages may remain accessible after de-allocation, which leads to security restrictions bypass and privilege escalation.
Remediation
Install update from vendor's website.