Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS04eGY0LXc3cXctcGpqd802tA

Firebase PHP-JWT key/algorithm type confusion

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.

Permalink: https://github.com/advisories/GHSA-8xf4-w7qw-pjjw
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS04eGY0LXc3cXctcGpqd802tA
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: about 2 years ago
Updated: about 1 year ago

CVSS Score: 9.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Identifiers: GHSA-8xf4-w7qw-pjjw, CVE-2021-46743
References:

• https://nvd.nist.gov/vuln/detail/CVE-2021-46743
• https://github.com/firebase/php-jwt/issues/351
• https://github.com/firebase/php-jwt/releases/tag/v6.0.0
• https://github.com/FriendsOfPHP/security-advisories/blob/master/firebase/php-jwt/CVE-2021-46743.yaml
• https://github.com/advisories/GHSA-8xf4-w7qw-pjjw

Repository: https://github.com/firebase/php-jwt
Blast Radius: 42.3

Affected Packages