CVEs / CVE-2021-22017
CVE-2021-22017: VMware vCenter Server Improper Access Control
- Known exploited in the CISA KEV catalog since 10 Jan 2022
- medium 5.3 CVSS 3.1 (NVD)
- EPSS 49.1% chance of exploitation in the next 30 days, higher than 98% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization.
Description
Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization. A malicious actor with network access to port 443 on vCenter Server may exploit this issue to bypass proxy leading to internal endpoints being accessed.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a VMware vCenter Server, VMware Cloud Foundation | VMware vCenter Server(6.7 before 6.7 U3o and 6.5 before 6.5 U3q) and VMware Cloud Foundation 3.x before 3.10.2.2 | — |
Exploitation
| In CISA KEV since | 10 Jan 2022 |
|---|---|
| Due date for US federal agencies | 24 Jan 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NScored by NVD |
|---|
References
- CVE-2021-22017 on NVD
- CVE-2021-22017 in the CISA KEV catalog
- https://www.vmware.com/security/advisories/VMSA-2021-0020.html Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22017 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.