CVE-2021-22043
First published: Wed Feb 16 2022(Updated: )
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.
Credit: security@vmware.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| VMware Fusion | <4.4 | |
| VMware ESXi | =7.0-update_1 | |
| VMware ESXi | =7.0-update_2 | |
| VMware ESXi | =7.0-update_3 |
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Frequently Asked Questions
What is CVE-2021-22043?
CVE-2021-22043 is a TOCTOU vulnerability in VMware ESXi that allows a malicious actor to escalate privileges by writing arbitrary files.
How does CVE-2021-22043 affect VMware Fusion?
CVE-2021-22043 affects VMware Fusion version 4.4 and prior.
How does CVE-2021-22043 affect VMware ESXi?
CVE-2021-22043 affects VMware ESXi version 7.0-update_1, 7.0-update_2, and 7.0-update_3.
What is the severity of CVE-2021-22043?
CVE-2021-22043 has a severity value of 7.5 (high).
Is there a fix available for CVE-2021-22043?
Yes, VMware has released a security advisory (VMSA-2022-0004) that provides the necessary patches to address the vulnerability.
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- version/vmware esxi/7.0-update_3