Security context
What an agent needs to avoid regressing past fixes and find the next vuln in this repo.
visionmedia/node-cookie-signature
master @ b7bd4cb
3
Fixes
0
CVEs
HIGH
Peak severity
Highlights
Timing Attack: 2 prior fixes. Scrutinize any change in this area.
index.js: most-fixed (3 issues). Treat as high-risk during review.
1 high-severity fix in this history; regressions here are high-impact.
Recurring patterns
The bug types that recur here, drawn from past fixes, not open vulnerabilities.
Timing Attack: The use of standard equality operators (==) to compare signatures allowed attackers to reconstruct valid signatures byte-by-byte using timing analysis. This was mitigated by adopting a double-HMAC comparison pattern to guarantee constant-time verification.
Auth Bypass: Overly strict validation of the secret key could cause runtime errors or lead to improper key handling when users passed valid non-string key types (like Buffers). This was addressed by relaxing type checks to accept any valid key representation suitable for HMAC generation.