THREATPORT/VULNERABILITY/CVE-2009-2422
CRITICAL SEVERITY

CVE-2009-2422

Ruby On Rails vulnerability

CVSS
9.8
EPSS
3.4%
EPSS pct
88th
Exploited
No known
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.
Affected vendor
Rubyonrails
Affected product
Ruby On Rails
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-287 — Improper Authentication
Published
2009-07-10

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2009-2422

  • Confirm whether Rubyonrails Ruby On Rails is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2009-2422.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-2422

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-2422 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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