CVE-2009-2422: apple mac_os_x Improper Authentication
Vulnerability summary
CVE-2009-2422 is a critical (CVSS 9.8) Improper Authentication vulnerability in apple mac_os_x. EPSS estimates a 3.38% chance of exploitation in the next 30 days, higher than 88.6% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 10-07-2009PublishedVulnerability first disclosed.
- 07-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · RubygemsEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
3.38%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
0.00 pp
From 3.38% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (n8.tumblr.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Apple2 products
- mac_os_x≥ 10.6.0, < 10.6.3 | 10.5.8
- mac_os_x_server≥ 10.6.0, < 10.6.3 | 10.5.8
Debian1 product
- rails< 2.3.5-1
RubyGems1 product
- rails< 2.3.3
Rubyonrails1 product
- ruby_on_rails< 2.3.3
4 vendors · 5 products
References
13 links- lists.apple.com/archives/security-announce/2010//Mar/msg00001.htmlVendor AdvisoryX Refsource APPLEMailing ListWEB
- weblog.rubyonrails.org/2009/6/3/security-problem-with-authenticate_with_http_digestX Refsource CONFIRMPatchWEB
