CVE-2009-2422

CRITICAL

Ruby on Rails <2.3.3 - Auth Bypass

Title source: llm

Description

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.

References (8)

[Mailing List] http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html

[Exploit, Patch] http://n8.tumblr.com/post/117477059/security-hole-found-in-rails-2-3s

[Broken Link, Vendor Advisory] http://secunia.com/advisories/35702

[Third Party Advisory] http://support.apple.com/kb/HT4077

[Patch] http://weblog.rubyonrails.org/2009/6/3/security-problem-with-authenticate_with_http_digest

[Broken Link, Patch, Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/35579

[Broken Link, Patch, Vendor Advisory] http://www.vupen.com/english/advisories/2009/1802

[Third Party Advisory, VDB Entry] https://exchange.xforce.ibmcloud.com/vulnerabilities/51528

Scores

CVSS v3 9.8

EPSS 0.0040

EPSS Percentile 60.5%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

CWE

CWE-287

Status draft

Affected Products (6)

rubyonrails/ruby_on_rails < 2.3.3

apple/mac_os_x < 10.6.3

apple/mac_os_x

apple/mac_os_x_server < 10.6.3

apple/mac_os_x_server

rubygems/rails < 2.3.3RubyGems

Timeline

Published Jul 10, 2009

Tracked Since Feb 18, 2026