Home/CVE/VMware ESXi contains a TOCTOU (Time-of-check Time-of-use) vulnerability that exists in the way temporary files are handl
CVE

CVE-2021-22043

VMware ESXi contains a TOCTOU (Time-of-check Time-of-use) vulnerability that exists in the way temporary files are handl

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.

HIGH · CVSS 7.5 EPSS 0.00358
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
⬡

Weakness Classification

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
▤

Affected Products & Versions

2
vmware fusion< 4.4
vmware esxiall versions
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighESXi Admin Permission Assigned To Account Via ESXCLI
productmediumESXi Storage Information Discovery Via ESXCLI
productmediumESXi Network Configuration Discovery Via ESXCLI
productmediumESXi VSAN Information Discovery Via ESXCLI
productmediumESXi System Information Discovery Via ESXCLI
productmediumESXi VM Kill Via ESXCLI
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security@vmware.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Feb 2022 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

1
vmware-vmsavmware-vmsa-security-advisories-vmsa-2022-0004-README
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.vmware.com/security/advisories/VMSA-2022-0004.htmlPatchVendor Advisory
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