CVE-2022-2220
Description
Insufficient Granularity of Access Control in an OpenShift router causes improper subdomain ownership verification, allowing route takeover. Once a custom route is created, the user must update the DNS provider by creating a canonical name (CNAME) record to expose this route externally. The CNAME record should point the custom domain to the OpenShift router as the alias. If the CNAME is not removed when the route is not in use anymore, there is a dangling route that a malicious actor may take over.
Statement
Red Hat Product Security does not consider this to be a vulnerability. It is not in the scope of the ingress controller to manage external dns records. It is the cluster administrator's responsibility to manage DNS records and to secure sensitive routes using TLS.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 0 | 6.5 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | High | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Understanding the Weakness (CWE)
Confidentiality,Integrity
Technical Impact: Read Application Data; Modify Application Data
An attacker could read and modify data for which they do not have permissions to access directly.
Acknowledgements
This issue was discovered by Luiza Nacshon (Red Hat Product Security) and Thibault Guittet (Red Hat Product Security).
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
