{"id":"UBUNTU-CVE-2015-7519","details":"agent/Core/Controller/SendRequest.cpp in Phusion Passenger before 4.0.60 and 5.0.x before 5.0.22, when used in Apache integration mode or in standalone mode without a filtering proxy, allows remote attackers to spoof headers passed to applications by using an _ (underscore) character instead of a - (dash) character in an HTTP header, as demonstrated by an X_User header.","modified":"2025-07-16T06:46:58.068840Z","published":"2016-01-08T19:59:00Z","withdrawn":"2025-07-18T16:43:17Z","upstream":["CVE-2015-7519"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2015-7519"},{"type":"REPORT","url":"https://bugzilla.suse.com/show_bug.cgi?id=956281"},{"type":"REPORT","url":"https://github.com/phusion/passenger/commit/ddb8ecc4ebf260e4967f57f271d4f5761abeac3e"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2015-7519"}],"affected":[{"package":{"name":"passenger","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/passenger@5.0.22-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.22-1"}]}],"versions":["5.0.7-3"],"ecosystem_specific":{"binaries":[{"binary_version":"5.0.22-1","binary_name":"libapache2-mod-passenger"},{"binary_version":"5.0.22-1","binary_name":"libapache2-mod-passenger-dbgsym"},{"binary_version":"5.0.22-1","binary_name":"passenger"},{"binary_version":"5.0.22-1","binary_name":"passenger-dbgsym"},{"binary_version":"5.0.22-1","binary_name":"passenger-doc"},{"binary_version":"5.0.22-1","binary_name":"ruby-passenger"},{"binary_version":"5.0.22-1","binary_name":"ruby-passenger-doc"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2015/UBUNTU-CVE-2015-7519.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}