cjose: AES GCM decryption uses the Tag length from the actual Authentication Tag provided in the JWE

A vulnerability was found in cjose. The cjose is a C library implementing the Javascript Object Signing and Encryption JOSE. The AES GCM decryption routine incorrectly uses the tag length from the actual Authentication Tag provided in the JSON Web Encryption JWE. A fixed length of 16 octets must ...