CRITICAL9.1
GHSA-8xf4-w7qw-pjjw
Firebase PHP-JWT key/algorithm type confusion
Quick fix
GHSA-8xf4-w7qw-pjjw — firebase/php-jwt: upgrade to the fixed version with the command below.
composer require firebase/php-jwt:^6.0.0Details
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.
Are you affected?
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Affected packages
Packagist/firebase/php-jwt
Introduced in:
0Fixed in: 6.0.0Fix
composer require firebase/php-jwt:^6.0.0References
- https://nvd.nist.gov/vuln/detail/CVE-2021-46743[ADVISORY]
- https://github.com/firebase/php-jwt/issues/351[WEB]
- https://github.com/FriendsOfPHP/security-advisories/blob/master/firebase/php-jwt/CVE-2021-46743.yaml[WEB]
- https://github.com/firebase/php-jwt[PACKAGE]
- https://github.com/firebase/php-jwt/releases/tag/v6.0.0[WEB]