CVE-2021-36371
3.7 · LOWOverview
CVE-2021-36371 is a low-severity vulnerability affecting getambassador emissary-ingress. It was published on July 9, 2021 and has a CVSS 3.1 base score of 3.7 (LOW).
This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Emissary-Ingress (formerly Ambassador API Gateway) through 1.13.9 allows attackers to bypass client certificate requirements (i.e., mTLS cert_required) on backend upstreams when more than one TLSContext is defined and at least one configuration exists that does not require client certificate authentication. The attacker must send an SNI specifying an unprotected backend and an HTTP Host header specifying a protected backend. (2.x versions are unaffected. 1.x versions are unaffected with certain configuration settings involving prune_unreachable_routes and a wildcard Host resource.)
Remediation
Check the references section for vendor advisories and patches from getambassador. Update emissary-ingress 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 |
|---|---|---|---|
| getambassador | emissary-ingress | 0 | Affected |
Frequently Asked Questions
What is CVE-2021-36371?
CVE-2021-36371 is a low-severity vulnerability affecting getambassador emissary-ingress. It was published on July 9, 2021 and has a CVSS 3.1 base score of 3.7 (LOW).
How severe is CVE-2021-36371?
This vulnerability has a CVSS 3.1 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-36371?
Check the references section for vendor advisories and patches from getambassador. Update emissary-ingress 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-2021-36371?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-36371 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
AI agents map your attack surface to find vulnerabilities like this one.
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