Cerberus FTP Server 1.x Remote DoS attack Vulnerability

From: Cartel Informatique Security Research Labs (srl@cartel-info.fr)
Date: Thu Jun 21 2001 - 07:22:12 PDT

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    Cerberus FTP Server 1.x Remote DoS attack Vulnerability
    
    Cartel Advisory Code:  CART-0101
    
    
    Vendor Affected:
    
    greenepa's:
    http://www.greenepa.net/~averett/
    
    Public Disclosure Date:
    21-06-2001
    
    
    Systems Affected:
    Cerberus FTP Server, 1.x (1.2 and 1.5 were tested only)
    
    Credits: 
    Nicolas Brulez - Brulez@cartel-info.fr
    
    Problem:
    
    Cartel security team has found a buffer overflow in the Cerberus FTP
    server,
    which means that an attacker can execute a denial of service attack
    against it.This attack will crash the server, without any error.
    FTP service is then unavailable.
    
    Note: 
    
    The binary exploit is given as a proof of concept.
    It is for educational purpose only.
    Cartel team can't be held responsible for anything you do
    with this file.
    The exploit file has been fully coded in Win32 assembly language.
    
    Example: 
    
    220-Welcome to Cerberus FTP Server
    220 Created by Grant Averett
    USER [buffer]
    PASS [anything]
    
    
    [buffer] is aprox. 320 characters.
    
    note:
    
    A good combination of the buffer and pass is needed in order to
    crash the server.Passing only a BIG user won't crash anything.
    
    
    Date of Vendor Notification:
    20-6-2001
    
    Status:  
    
    Waiting answer from the author.
    
    Fix: 
    none yet.
    
    
    Greetings to my friends at:
    
    USSR, Hert,Vauban systems and qualys.
    
    About:
    
    Cartel is a company based in France, dedicated to Research about network
    security and
    application security systems.
    
    
    Security services provided are :
    
    - Firewalls testing
    - Network Penetration Testing
    - Application Security Testing
    - Data protecting
    - Intrusion Detection systems
    - Binary auditing
    - Secured hosting
    - Antivirus
    - PKI
    - VPN
    
    
    Copyright (c) Cartel informatique Security Research LABS.
    This Document is copyrighted.It can't be edited nor republished
    without explicit consent of CARTEL LABS.
    
    For more informations, feel free to contact us.
    
    Cartel info security research labs
    mail: srl@cartel-info.fr
    http://securite.cartel-info.fr/  (french site)
    
    



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