CVE-2021-3636
4.6 · MEDIUMOverview
CVE-2021-3636 is a medium-severity vulnerability affecting redhat openshift. It was published on July 30, 2021 and has a CVSS 3.1 base score of 4.6 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 4.6, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
It was found in OpenShift, before version 4.8, that the generated certificate for the in-cluster Service CA, incorrectly included additional certificates. The Service CA is automatically mounted into all pods, allowing them to safely connect to trusted in-cluster services that present certificates signed by the trusted Service CA. The incorrect inclusion of additional CAs in this certificate would allow an attacker that compromises any of the additional CAs to masquerade as a trusted in-cluster service.
Remediation
Check the references section for vendor advisories and patches from redhat. Update openshift to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| redhat | openshift | >= 0, < 4.8 | Affected |
Frequently Asked Questions
What is CVE-2021-3636?
CVE-2021-3636 is a medium-severity vulnerability affecting redhat openshift. It was published on July 30, 2021 and has a CVSS 3.1 base score of 4.6 (MEDIUM).
How severe is CVE-2021-3636?
This vulnerability has a CVSS 3.1 base score of 4.6, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-3636?
Check the references section for vendor advisories and patches from redhat. Update openshift to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-3636?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-3636 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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