Vulnerability · Published Jul 14, 2022 · Assigned by GitHub_M
CVE-2022-31142Potential Timing Attack Vector in @fastify/bearer-auth
High 7.5
In plain English
A high-severity security flaw in fastify-bearer-auth from fastify. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
@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. There are currently no known workarounds. The package fastify-bearer-auth, which covers versions 6.0.3 and prior, is also vulnerable starting at version 5.0.1. Users of fastify-bearer-auth should upgrade to a patched version of @fastify/bearer-auth.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @fastify/bearer-auth | 7.0.2 | GHSA-376v-xgjx-7mfr |
| npm | @fastify/bearer-auth | 8.0.1 | GHSA-376v-xgjx-7mfr |
| npm | fastify-bearer-auth | no fix listed | GHSA-376v-xgjx-7mfr |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| fastify | fastify-bearer-auth | >= 5.0.1, < 7.0.2= 8.0.0 |
Weakness: CWE-208 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://github.com/fastify/fastify-bearer-auth/security/advisories/GHSA-376v-xgjx-7mfr x_refsource_CONFIRM
- https://github.com/fastify/fastify-bearer-auth/commit/0c468a616d7e56126dc468150f6a5a92e530b8e4 x_refsource_MISC
- https://github.com/fastify/fastify-bearer-auth/commit/39353b15409ee99474545f615ffb16180cf3b716 x_refsource_MISC
- https://github.com/fastify/fastify-bearer-auth/commit/f921a0582dc83112039004a9b5041141b50c5b3f x_refsource_MISC
- https://hackerone.com/reports/1633287 x_refsource_MISC