by Kastro
Paper/Archive/CVE-2021-46743

CVE-2021-46743

mitre — 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 multipl…

EPSS 0.9%CVSS 9.1
critical.is priorityof 100
39
CVSS 9.1 (NVD)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 60.2.602 × 2012.0No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
n/an/a–CNA

Scores by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

refgithub.com/firebase/php-jwt/issues/351