{"id":"CVE-2009-2422","details":"The example code for the digest authentication functionality (http_authentication.rb) in Ruby on Rails before 2.3.3 defines an authenticate_or_request_with_http_digest block that returns nil instead of false when the user does not exist, which allows context-dependent attackers to bypass authentication for applications that are derived from this example by sending an invalid username without a password.","aliases":["GHSA-rxq3-gm4p-5fj4"],"modified":"2026-01-27T04:09:53.491423Z","published":"2009-07-10T15:30:00Z","withdrawn":"2026-01-27T04:09:53.491423Z","references":[{"type":"ADVISORY","url":"http://secunia.com/advisories/35702"},{"type":"ADVISORY","url":"http://support.apple.com/kb/HT4077"},{"type":"WEB","url":"http://www.securityfocus.com/bid/35579"},{"type":"FIX","url":"http://www.vupen.com/english/advisories/2009/1802"},{"type":"ADVISORY","url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/51528"},{"type":"ARTICLE","url":"http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html"},{"type":"FIX","url":"http://n8.tumblr.com/post/117477059/security-hole-found-in-rails-2-3s"},{"type":"FIX","url":"http://weblog.rubyonrails.org/2009/6/3/security-problem-with-authenticate_with_http_digest"}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}