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.
CVE-2021-46743 - Critical Severity Vulnerability
A simple library to encode and decode JSON Web Tokens (JWT) in PHP. Should conform to the current spec.
Library home page: https://api.github.com/repos/firebase/php-jwt/zipball/9984a4d3a32ae7673d6971ea00bae9d0a1abba0e
Dependency Hierarchy: - laravel/passport-v7.3.0 (Root Library) - :x: **firebase/php-jwt-v5.0.0** (Vulnerable Library)
Found in base branch: master
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.
Publish Date: 2022-03-29
URL: CVE-2021-46743
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46743
Release Date: 2022-03-29
Fix Resolution: v6.0.0
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