Security context
What an agent needs to avoid regressing past fixes and find the next vuln in this repo.
joestump/python-oauth2
master @ b94f69b
6
Fixes
2
CVEs
HIGH
Peak severity
Highlights
Auth Bypass: 4 prior fixes. Scrutinize any change in this area.
oauth2/__init__.py: most-fixed (5 issues). Treat as high-risk during review.
2 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.
Insecure Randomness: The use of predictable pseudo-random numbers (random.randint) for nonces and verifiers allowed remote attackers to guess values and bypass replay protections, culminating in CVE-2013-4347. This was addressed by transitioning to cryptographically secure random number generation.
Auth Bypass: Improper exclusion of existing 'oauth_signature' parameters during normalization allowed attackers to distort signature base string calculations, undermining authentication verification.
Signature Bypass: Failing to filter out 'oauth_' prefixed parameters from the URL query string before sorting and encoding permitted signature manipulation. This allows crafted parameters to masquerade as part of the authentic request.