CVE-2021-21991 Privilege escalation in VMware vCenter Server, VMware Cloud Foundation
A local attacker with non-administrative access can escalate privileges to Administrator on VMware vCenter Server via session token handling flaws.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21991?
CVE-2021-21991 is a high-severity vulnerability in Vmware Cloud Foundation, published on 22 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The vCenter Server contains a local privilege escalation vulnerability due to the way it handles session tokens. A malicious actor with non-administrative user access on vCenter Server host may exploit this issue to escalate privileges to Administrator on the vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash).
Which versions are affected by CVE-2021-21991?
It affects 2 products.
Products include Vmware Cloud Foundation, Vmware Vcenter Server.
How do I fix CVE-2021-21991?
No fix has been published for CVE-2021-21991 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-21991 being exploited?
There is no known exploitation of CVE-2021-21991 in the wild and no public exploit code.
Other vulnerabilities in Vmware Cloud Foundation
- CVE-2024-38812 VMware vCenter Server Heap-Based Buffer Overflow
- CVE-2024-37079 Broadcom VMware vCenter Server Out-of-bounds Write
- CVE-2022-22954 VMware Workspace ONE Access and Identity Manager Server-Side Template Injection
- CVE-2021-22005 VMware vCenter Server File Upload
- CVE-2021-21985 VMware vCenter Server Improper Input Validation
Sources
Also known as GHSA-h338-w3fh-545j.