GitHub Advisoryadvisory · Packagist

GHSA-8xf4-w7qw-pjjw Firebase PHP-JWT key/algorithm type confusion

CRITICAL Published 2022-03-30 Modified 2023-02-17 Official page ↗
Aliases
CVE-2021-46743
Ecosystem
Packagist
Packages
firebase/php-jwt
Severity
Critical
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-347, CWE-843
Reviewed
2023-02-17

Affected packages

• Packagist firebase/php-jwt: < 6.0.0 → fixed in 6.0.0

Description

In Firebase PHP-JWT before 6.0.0, an algorithm-confusion issue (e.g., RS256 / HS256) exists via the kid (aka Key ID) header, when multiple types of keys are loaded in a key ring. This allows an attacker to forge tokens that validate under the incorrect key. NOTE: this provides a straightforward way to use the PHP-JWT library unsafely, but might not be considered a vulnerability in the library itself.

Related

Alias · CVE (1)

  • CVE-2021-46743 In Firebase PHP-JWT before 6.0.0, an algorithm-confusion issue (e.g., RS256 / HS256) exists via the kid (aka Key ID) header, when multiple… vulnerability

Weakness · CWE (2)

  • CWE-347 Improper Verification of Cryptographic Signature weakness
  • CWE-843 Access of Resource Using Incompatible Type weakness

References