Permissions, Privileges, and Access Controls in vCenter Server - CVE-2021-21991
Published: September 21, 2021
Vulnerability identifier: #VU56791
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Clear
CVE-ID: CVE-2021-21991
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: VMware, Inc
Affected software:
vCenter Server
vCenter Server
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to the way the vCenter Server handles session tokens. A local user can escalate privileges to Administrator on the vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash).
How to mitigate CVE-2021-21991
Install updates from vendor's website.