CVE-2009-2422

moderate-risk
Published 2009-07-10

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.

Do I need to act?

-
0.40% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (5)

Ruby On Rails

Affected Vendors

Apple Rubyonrails

References (16)

Mailing List http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html
Exploit http://n8.tumblr.com/post/117477059/security-hole-found-in-rails-2-3s
Broken Link 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_h...
Broken Link http://www.securityfocus.com/bid/35579
Broken Link http://www.vupen.com/english/advisories/2009/1802
Third Party Advisory https://exchange.xforce.ibmcloud.com/vulnerabilities/51528
Mailing List http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html
Exploit http://n8.tumblr.com/post/117477059/security-hole-found-in-rails-2-3s
Broken Link 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_h...
Broken Link http://www.securityfocus.com/bid/35579
Broken Link http://www.vupen.com/english/advisories/2009/1802
Third Party Advisory https://exchange.xforce.ibmcloud.com/vulnerabilities/51528
46
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 2/34 · Minimal
Exposure 12/34 · Low