Donato Ferrante Application: Bird Chat http://birdchat.sourceforge.net/ Version: 1.61 Bug: Denial Of Service Date: 23-Aug-2004 Author: Donato Ferrante e-mail: fdonato@autistici.org web: www.autistici.org/fdonato xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx 1. Description 2. The bug 3. The code 4. The fix xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ---------------- 1. Description: ---------------- Vendor's Description: "Bird Chat is a chat client / server software designed with an easy and simple interface." xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ------------ 2. The bug: ------------ The bug is a denial of service versus clients, in fact an attacker can crash all the chat clients connected to the chat server, by using few fake users. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ------------- 3. The code: ------------- To test the vulnerability: http://www.autistici.org/fdonato/poc/BirdChat[161]DoS-poc.zip xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx ------------ 4. The fix: ------------ No fix. The vendor has not answered to my signalations. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx