CVE-2021-21995 Denial of service in VMware ESXi and VMware Cloud Foundation
A remote attacker can cause a denial of service in VMware ESXi by triggering a heap out-of-bounds read in the OpenSLP service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21995?
CVE-2021-21995 is a high-severity denial of service vulnerability in Vmware Cloud Foundation, published on 13 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenSLP as used in ESXi has a denial-of-service vulnerability due a heap out-of-bounds read issue. A malicious actor with network access to port 427 on ESXi may be able to trigger a heap out-of-bounds read in OpenSLP service resulting in a denial-of-service condition.
Weakness: CWE-125
Which versions are affected by CVE-2021-21995?
It affects 2 products.
Products include Vmware Cloud Foundation, Vmware Esxi.
How do I fix CVE-2021-21995?
No fix has been published for CVE-2021-21995 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-21995 being exploited?
There is no known exploitation of CVE-2021-21995 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-x2m6-68vv-69j3.