Permissions, Privileges, and Access Controls in Xen - CVE-2021-28703
Published: November 24, 2021
Vulnerability identifier: #VU58343
CSH Severity: Medium
CVSS v4.0: 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
CVE-ID: CVE-2021-28703
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Xen Project
Affected software:
Xen
Xen
Detailed vulnerability description
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.
How to mitigate CVE-2021-28703
Install updates from vendor's website.