Security context
What an agent needs to avoid regressing past fixes and find the next vuln in this repo.
omniauth/omniauth-oauth2
master @ 1481c33
9
Fixes
1
CVEs
HIGH
Peak severity
Highlights
CSRF: 2 prior fixes. Scrutinize any change in this area.
lib/omniauth/strategies/oauth2.rb: most-fixed (9 issues). Treat as high-risk during review.
6 high-severity fixes in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Cross-Site Request Forgery: The state parameter validation logic has repeatedly suffered from implementation bypasses, such as early-exit logic when OAuth error parameters are present or empty state parameters are submitted. This allows attackers to complete auth flows without validating the session's state.
Auth Bypass: Logical flaws in condition evaluation (such as incorrect elsif branching) have historically prevented subsequent state validation checks from executing, letting unauthenticated flows succeed silently.
Insufficient Entropy: Using predictable pseudo-random number generators to construct the CSRF state token allowed attackers to guess state parameters, undermining the core protection mechanism.