Time-of-check Time-of-use (TOCTOU) Race Condition in VMware ESXi - CVE-2021-22043

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Main Vulnerability Database Vulnerabilities #VU60618

Time-of-check Time-of-use (TOCTOU) Race Condition in VMware ESXi - CVE-2021-22043

Published: February 15, 2022


Vulnerability identifier: #VU60618
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-22043
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a Time-of-check Time-of-use vulnerability when handling temporary files. A local user with access to settingsd can escalate privileges on the system.


Affected software

VMware ESXi
Dell Enterprise Hybrid Cloud
Cloud Foundation

How to mitigate CVE-2021-22043

Install updates from vendor's website.

VMware ESXi - addressed in versions ESXi70U1e-19324898, ESXi70U2e-19290878, ESXi70U3c-19193900
Dell Enterprise Hybrid Cloud - update to 4.1.2
Cloud Foundation - update to 4.4

External References

Related Security Bulletins