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CVE-2017-11173

8.8 · HIGH

Missing anchor in generated regex for rack-cors before 0.4.1 allows a malicious third-party site to perform CORS requests.

Published Jul 13, 2017EPSS 2.34%

Overview

CVE-2017-11173 is a high-severity vulnerability. It was published on July 13, 2017 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Missing anchor in generated regex for rack-cors before 0.4.1 allows a malicious third-party site to perform CORS requests. If the configuration were intended to allow only the trusted example.com domain name and not the malicious example.net domain name, then example.com.example.net (as well as example.com-example.net) would be inadvertently allowed.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refseclists.org/fulldisclosure/2017/Jul/22Refwww.debian.org/security/2017/dsa-3931GitHubgithub.com/cyu/rack-cors/commit/42ebe6caa8e85ffa9c8a171bda668ba1acc7a5e6Refpacketstormsecurity.com/files/143345/rack-cors-Missing-Anchor.htmlRefseclists.org/fulldisclosure/2017/Jul/22Refwww.debian.org/security/2017/dsa-3931GitHubgithub.com/cyu/rack-cors/commit/42ebe6caa8e85ffa9c8a171bda668ba1acc7a5e6Refpacketstormsecurity.com/files/143345/rack-cors-Missing-Anchor.html

How CyberStrike helps

Frequently asked questions

What is CVE-2017-11173?

CVE-2017-11173 is a high-severity vulnerability. It was published on July 13, 2017 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2017-11173?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-11173?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2017-11173?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-11173 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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