CVE-2017-11173 The advisory has been revoked - it doesn't affect any version of package ruby-rack-cors (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1804-RUBYRACKCORS-618183
- published13 Jul 2017
- disclosed13 Jul 2017
Introduced: 13 Jul 2017
CVE-2017-11173 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:18.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ruby-rack-cors package and not the ruby-rack-cors package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-11173
- http://www.debian.org/security/2017/dsa-3931
- https://security-tracker.debian.org/tracker/CVE-2017-11173
- https://github.com/cyu/rack-cors/commit/42ebe6caa8e85ffa9c8a171bda668ba1acc7a5e6
- https://packetstormsecurity.com/files/143345/rack-cors-Missing-Anchor.html
- http://seclists.org/fulldisclosure/2017/Jul/22