CVE-2022-31142 – Potential Timing Attack Vector in @fastify/bearer-auth

https://notcve.org/view.php?id=CVE-2022-31142

@fastify/bearer-auth is a Fastify plugin to require bearer Authorization headers. @fastify/bearer-auth prior to versions 7.0.2 and 8.0.1 does not securely use crypto.timingSafeEqual. A malicious attacker could estimate the length of one valid bearer token. According to the corresponding RFC 6750, the bearer token has only base64 valid characters, reducing the range of characters for a brute force attack. Version 7.0.2 and 8.0.1 of @fastify/bearer-auth contain a patch. • https://github.com/fastify/fastify-bearer-auth/commit/0c468a616d7e56126dc468150f6a5a92e530b8e4 https://github.com/fastify/fastify-bearer-auth/commit/39353b15409ee99474545f615ffb16180cf3b716 https://github.com/fastify/fastify-bearer-auth/commit/f921a0582dc83112039004a9b5041141b50c5b3f https://github.com/fastify/fastify-bearer-auth/security/advisories/GHSA-376v-xgjx-7mfr https://hackerone.com/reports/1633287 • CWE-203: Observable Discrepancy CWE-208: Observable Timing Discrepancy •