CVE-2021-21974 Memory corruption in VMware Cloud Foundation
A heap-overflow in OpenSLP allows remote code execution on ESXi hosts by attackers on the same network segment.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21974?
CVE-2021-21974 is a high-severity memory corruption vulnerability in Vmware Cloud Foundation, published on 24 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
OpenSLP as used in ESXi (7.0 before ESXi70U1c-17325551, 6.7 before ESXi670-202102401-SG, 6.5 before ESXi650-202102101-SG) has a heap-overflow vulnerability. A malicious actor residing within the same network segment as ESXi who has access to port 427 may be able to trigger the heap-overflow issue in OpenSLP service resulting in remote code execution.
Weakness: CWE-787
Which versions are affected by CVE-2021-21974?
It affects 2 products.
Products include Vmware Cloud Foundation, Vmware Esxi.
How do I fix CVE-2021-21974?
No fix has been published for CVE-2021-21974 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-21974 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21974 exists.
Public exploit code: 7 proofs of concept on GitHub.
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-4mwc-fv8c-wp9f.