{"id":"UBUNTU-CVE-2020-5216","details":"In Secure Headers (RubyGem secure_headers), a directive injection vulnerability is present in versions before 3.9.0, 5.2.0, and 6.3.0. If user-supplied input was passed into append/override_content_security_policy_directives, a newline could be injected leading to limited header injection. Upon seeing a newline in the header, rails will silently create a new Content-Security-Policy header with the remaining value of the original string. It will continue to create new headers for each newline. This has been fixed in 6.3.0, 5.2.0, and 3.9.0.","modified":"2025-10-24T04:48:17Z","published":"2020-01-23T03:15:00Z","upstream":["CVE-2020-5216"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-5216"},{"type":"REPORT","url":"https://github.com/twitter/secure_headers/security/advisories/GHSA-w978-rmpf-qmwg"},{"type":"REPORT","url":"https://github.com/twitter/secure_headers/commit/301695706f6a70517c2a90c6ef9b32178440a2d0"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-5216"}],"affected":[{"package":{"name":"ruby-secure-headers","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ruby-secure-headers@3.7.1-1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.7.1-1","binary_name":"ruby-secure-headers"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-5216.json"}},{"package":{"name":"ruby-secure-headers","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ruby-secure-headers@6.1.1-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.0.0-1","6.1.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"6.1.1-1","binary_name":"ruby-secure-headers"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-5216.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}