{"id":"CVE-2009-3287","aliases":["DEBIAN-CVE-2009-3287","EUVD-2017-0256","GHSA-j24p-r6wx-r79w"],"status":"published","title":"High severity vulnerability that affects thin","description":"lib/thin/connection.rb in Thin web server before 1.2.4 relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01382,"percentile":0.72338,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2009-09-22T10:00:00Z","modified":"2026-10-23T17:47:40Z","fixes":[{"ecosystem":"RubyGems","package":"thin","fixed_in":["1.2.4"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"thin","fixed_in":["1.2.4-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"thin","fixed_in":["1.2.4-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"thin","fixed_in":["1.2.4-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"RubyGems","package":"thin","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.4"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"thin","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.4-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"thin","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.4-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"thin","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.4-1"}]}]},{"source":"osv","ecosystem":"RubyGems","package":"thin","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.4"}]}],"versions":["0.3.0","0.4.0","0.4.1","0.5.0","0.5.2","0.5.3","0.5.4","0.6.0","0.6.1","0.6.2","0.6.3","0.6.4","0.7.0","0.7.1","0.8.0","0.8.1","0.8.2","1.0.0","1.2.1","1.2.2","1.2.3"]}],"products":[{"vendor":"macournoyer","product":"thin"}],"references":[{"url":"http://github.com/macournoyer/thin/blob/master/CHANGELOG","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://github.com/macournoyer/thin/commit/7bd027914c5ffd36bb408ef47dc749de3b6e063a","tags":["x_refsource_CONFIRM","x_transferred","Patch","fix","web"]},{"url":"http://www.openwall.com/lists/oss-security/2009/09/12/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-3287","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-j24p-r6wx-r79w","tags":["advisory"]},{"url":"https://github.com/rubysec/ruby-advisory-db/blob/master/gems/thin/CVE-2009-3287.yml","tags":["web"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2009-3287","tags":["advisory"]},{"url":"http://github.com/macournoyer/thin","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2009-3287","description":"lib/thin/connection.rb in Thin web server before 1.2.4 relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.","status":"published","published":"2009-09-22T10:00:00Z","modified":"2024-09-16T23:56:47.504Z","updated_at":"2026-11-02T14:33:24.10565Z"}],"euvd":[{"id":"EUVD-2017-0256","description":"lib/thin/connection.rb in Thin web server before 1.2.4 relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.","status":"published","published":"2009-09-22T10:00:00Z","modified":"2024-09-16T23:56:47Z","updated_at":"2026-11-03T00:29:03.409164Z"}],"ghsa":[{"id":"GHSA-j24p-r6wx-r79w","title":"High severity vulnerability that affects thin","description":"lib/thin/connection.rb in Thin web server before 1.2.4 relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.","status":"published","published":"2017-10-24T18:33:38Z","modified":"2023-11-09T05:02:07Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:37:17.64478Z"}],"nvd":[{"id":"CVE-2009-3287","description":"lib/thin/connection.rb in Thin web server before 1.2.4 relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.","status":"published","published":"2009-09-22T10:30:00.64Z","modified":"2026-06-16T23:11:18.57Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:01:36.596719Z"}],"osv":[{"id":"CVE-2009-3287","description":"lib/thin/connection.rb in Thin web server before 1.2.4 relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.","status":"published","published":"2009-09-22T10:30:00Z","modified":"2026-04-10T03:40:54.099221Z","updated_at":"2026-11-02T15:43:57.714116Z"},{"id":"DEBIAN-CVE-2009-3287","description":"lib/thin/connection.rb in Thin web server before 1.2.4 relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.","status":"published","published":"2009-09-22T10:30:00.64Z","modified":"2026-10-23T17:47:40.542725195Z","updated_at":"2026-11-02T15:45:24.013654Z"},{"id":"GHSA-j24p-r6wx-r79w","title":"High severity vulnerability that affects thin","description":"lib/thin/connection.rb in Thin web server before 1.2.4 relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.","status":"published","published":"2017-10-24T18:33:38Z","modified":"2024-11-28T05:30:56.054926Z","cwes":["CWE-20"],"updated_at":"2026-11-02T15:46:49.621585Z"}]}}