QID 150572

Date Published: 2022-10-05

QID 150572: JWT token in Authorization header uses symmetric algorithm.

During the WAS scan , it was observed that JWT token is used in Authorization header contains symmetric algorithm.

If the server is expecting RSA but is sent HMAC-SHA with RSA's public key, the server will think the public key is actually an HMAC private key. This could be used to forge any data an attacker wants.
Symmetric algorithm uses a secret key to sign and verify messages. If the key is not strong it will be possible to break it using a brute-force or dictionary attack.

CVSS V3 rated as High - 7.3 severity.

CVSS V2 rated as High - 7.5 severity.

Solution

Review the JWT token set in Authorization header to use only one selected signature algorithm.

Vendor References

CVEs related to QID 150572

Software Advisories

Advisory ID	Software	Component	Link

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