CVE-2021-41106 (GCVE-0-2021-41106)

Vulnerability from cvelistv5 – Published: 2021-09-28 20:50 – Updated: 2024-08-04 02:59
VLAI
Title
File reference keys leads to incorrect hashes on HMAC algorithms
Summary
JWT is a library to work with JSON Web Token and JSON Web Signature. Prior to versions 3.4.6, 4.0.4, and 4.1.5, users of HMAC-based algorithms (HS256, HS384, and HS512) combined with `Lcobucci\JWT\Signer\Key\LocalFileReference` as key are having their tokens issued/validated using the file path as hashing key - instead of the contents. The HMAC hashing functions take any string as input and, since users can issue and validate tokens, users are lead to believe that everything works properly. Versions 3.4.6, 4.0.4, and 4.1.5 have been patched to always load the file contents, deprecated the `Lcobucci\JWT\Signer\Key\LocalFileReference`, and suggest `Lcobucci\JWT\Signer\Key\InMemory` as the alternative. As a workaround, use `Lcobucci\JWT\Signer\Key\InMemory` instead of `Lcobucci\JWT\Signer\Key\LocalFileReference` to create the instances of one's keys.
Severity
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
lcobucci jwt Affected: >= 3.4.0, < 3.4.6
Affected: >= 4.0.0, < 4.0.4
Affected: >= 4.1.0, < 4.1.5
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