{"id":"CVE-2020-5217","state":"PUBLISHED","title":"Directive injection when using dynamic overrides with user input in RubyGems secure_headers","description":"In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.8.0, 5.1.0, and 6.2.0. If user-supplied input was passed into append/override_content_security_policy_directives, a semicolon could be injected leading to directive injection. This could be used to e.g. override a script-src directive. Duplicate directives are ignored and the first one wins. The directives in secure_headers are sorted alphabetically so they pretty much all come before script-src. A previously undefined directive would receive a value even if SecureHeaders::OPT_OUT was supplied. The fixed versions will silently convert the semicolons to spaces and emit a deprecation warning when this happens. This will result in innocuous browser console messages if being exploited/accidentally used. In future releases, we will raise application errors resulting in 500s. Depending on what major version you are using, the fixed versions are 6.2.0, 5.1.0, 3.8.0.","publishedAt":"2020-01-23T02:15:17.000Z","updatedAt":"2024-08-04T08:22:08.919Z","severity":{"score":4.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["Twitter secure_headers"],"affected":[{"vendor":"Twitter","product":"secure_headers","versions":[{"version":"< 3.8.0","status":"affected"},{"version":">= 5.0.0, < 5.1.0","status":"affected"},{"version":">= 6.0.0, < 6.2.0","status":"affected"}]}],"references":["https://github.com/twitter/secure_headers/security/advisories/GHSA-xq52-rv6w-397c","https://github.com/twitter/secure_headers/issues/418","https://github.com/twitter/secure_headers/pull/421","https://github.com/twitter/secure_headers/commit/936a160e3e9659737a9f9eafce13eea36b5c9fa3"],"weaknesses":["CWE-95"],"ingestedAt":"2026-10-29T19:47:35.543Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2020/5xxx/CVE-2020-5217.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2020-5217","state":"PUBLISHED","datePublished":"2020-01-23T02:15:17.000Z","dateUpdated":"2024-08-04T08:22:08.919Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2020-01-02T00:00:00.000Z"},"containers":{"cna":{"title":"Directive injection when using dynamic overrides with user input in RubyGems secure_headers","descriptions":[{"lang":"en","value":"In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.8.0, 5.1.0, and 6.2.0. 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