T09 · Insecure Skill Coding Practices
Error
- Location
- references/telegram-bot.md:147
- Finding
- Unauthenticated Telegram Users Can Spend the Shared Casino Balance<![CDATA[ ## Vulnerability Details **File Location**: `references/telegram-bot.md`, lines 147–168 and 187–194 **Vulnerability Type**: Missing authorization, transaction limits, and rate limiting **Risk Level**: High ### Vulnerable Code ```python async def cmd_autoplay(update: Update, context: ContextTypes.DEFAULT_TYPE): if len(context.args) < 3: await update.message.reply_text("Usage: /autoplay <game> <amount> <rounds>") return game, amount, rounds = context.args[0], float(context.args[1]), int(context.args[2]) await update.message.reply_text(f"🤖 Auto-playing {rounds} rounds of {game} at {amount} each...") wins, losses, total_payout = 0, 0, 0 for i in range(rounds): kwargs = {"choice": "heads"} if game == "coinflip" else {"target": 50, "over": True} result = place_bet(game, amount, **kwargs) if result.get("won"): wins += 1 total_payout += result.get("payout", 0) else: losses += 1 await update.message.reply_text( f"🏁 Auto-play complete!\n" f"Rounds: {rounds} | Wins: {wins} | Losses: {losses}\n" f"Total wagered: {amount * rounds} | Total payout: {total_payout}\n" f"Net: {total_payout - (amount * rounds)}" ) ``` ```python app.add_handler(CommandHandler("coinflip", cmd_coinflip)) app.add_handler(CommandHandler("dice", cmd_dice)) app.add_handler(CommandHandler("bet", cmd_bet)) app.add_handler(CommandHandler("balance", cmd_balance)) app.add_handler(CommandHandler("history", cmd_history)) app.add_handler(CommandHandler("autoplay", cmd_autoplay)) app.add_handler(CallbackQueryHandler(button_callback)) ``` ### Technical Analysis All Telegram users who can interact with the bot are allowed to invoke commands that submit authenticated casino transactions. The bot uses one process-wide `AGENT_CASINO_API_KEY`, so user-issued commands operate against the operator's shared casino account rather than an independently authenticated ...[truncated 1415 chars]
- Remediation
- <![CDATA[ ## Remediation Suggestions - Deny betting commands by default and configure an explicit allowlist of authorized Telegram user and chat IDs. - Perform authorization checks inside every state-changing command and callback handler. - Assign each user a separately authenticated and funded account instead of sharing an operator-level API key. - Enforce server-side limits on individual wager amounts, rounds per request, wagers per time interval, daily loss, and total exposure. - Require explicit confirmation before initiating autoplay or high-value transactions. - Add per-user and global rate limiting, concurrency controls, and a circuit breaker. - Validate that amounts are finite, positive, and within configured bounds. - Restrict the game parameter to an explicit allowlist. - Record the requesting Telegram user ID in a tamper-resistant audit log. - Provide an operator-accessible emergency stop that immediately disables all betting. ]]>