CVE-2021-22043 Race condition in VMware ESXi and VMware Cloud Foundation
A local attacker with access to settingsd can exploit a TOCTOU race condition in temporary file handling to escalate privileges and write arbitrary files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-22043?
CVE-2021-22043 is a high-severity vulnerability in Vmware Esxi, published on 16 Feb 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
VMware ESXi contains a TOCTOU (Time-of-check Time-of-use) vulnerability that exists in the way temporary files are handled. A malicious actor with access to settingsd, may exploit this issue to escalate their privileges by writing arbitrary files.
Weakness: CWE-367
Which versions are affected by CVE-2021-22043?
It affects 2 products.
Products include Vmware Esxi, Vmware Fusion.
How do I fix CVE-2021-22043?
No fix has been published for CVE-2021-22043 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-22043 being exploited?
There is no known exploitation of CVE-2021-22043 in the wild and no public exploit code.
Other vulnerabilities in Vmware Esxi
Sources
Also known as GHSA-27hx-pvj5-2hqg.