Home/CVE/@fastify/bearer-auth is a Fastify plugin to require bearer Authorization headers. @fastify/bearer-auth prior to versions
CVE

CVE-2022-31142

@fastify/bearer-auth is a Fastify plugin to require bearer Authorization headers. @fastify/bearer-auth prior to versions

@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.

HIGH · CVSS 7.5 EPSS 0.00739
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-203Observable Discrepancy
CWE-208Observable Timing Discrepancy
▤

Affected Products & Versions

2
fastify bearer-auth>= 5.0.1 and < 7.0.2
fastify bearer-authall versions
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
npm @fastify/bearer-auth HIGH fixed in 7.0.2
npm fastify-bearer-auth HIGH
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 Jul 2022 · 07:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/fastify/fastify-bearer-auth/commit/0c468a616d7e56126dc468150f6a5a92e530b8e4PatchThird Party Advisory
https://github.com/fastify/fastify-bearer-auth/commit/39353b15409ee99474545f615ffb16180cf3b716PatchThird Party Advisory
https://github.com/fastify/fastify-bearer-auth/commit/f921a0582dc83112039004a9b5041141b50c5b3fPatchThird Party Advisory
https://github.com/fastify/fastify-bearer-auth/security/advisories/GHSA-376v-xgjx-7mfrThird Party Advisory
https://hackerone.com/reports/1633287Permissions RequiredThird Party Advisory
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