GHSA-w67g-5rqw-f597
Gorilla WebSocket Uses Cryptographically Weak PRNG for WebSocket Mask Key
Summary
gorilla/websocket used `math/rand` (cryptographically weak pseudo-random number generator) to generate WebSocket frame mask keys prior to commit d67f4185. WebSocket masking keys MUST be unpredictable to prevent frame content injection attacks. math/rand produces deterministic output when seeded with a known value, enabling an attacker to predict or recover mask keys and inject content into WebSocket connections. **Type:** Use of Cryptographically Weak Pseudo-Random Number Generator **Fix:** Replaced math/rand with crypto/rand (commit d67f4185, released in v1.5.3) **Credit:** bounty-hunter v6.0 silent-fix detection
Affected packages
| Ecosystem | Package | Affected versions | Fixed versions |
|---|---|---|---|
| Go | github.com/gorilla/websocket | — | 1.5.3 |
Remediation: Upgrade to 1.5.3 or later.
References
Includes data from the GitHub Advisory Database, licensed under CC-BY 4.0.