Is CVE-2021-22017 known to be exploited?

Yes. CVE-2021-22017 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-01-10), indicating it is being actively exploited. 12 public proof-of-concept repositories are indexed.

Vulnerability in Vmware Vcenter Server, Cloud Foundation

CVE-2021-22017

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 interna…

EPSS: 0.748 (98.9th percentile) — read the EPSS interpretation.

Affected products

N/a Vmware Vcenter Server, Cloud Foundation — versions 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

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-01-10. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-01-24.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

www.vmware.com/security/advisories/VMSA-2021-0020.html (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-22017?: CVE-2021-22017 is a vulnerability in Vmware Vcenter Server, Cloud Foundation. Published 2021-09-23.
Is CVE-2021-22017 known to be exploited?: Yes. CVE-2021-22017 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-01-10), indicating it is being actively exploited. 12 public proof-of-concept repositories are indexed.