AUSCERT External Security Bulletin Redistribution

                 ESB-2002.656 -- CERT Advisory CA-2002-32
                    Backdoor in Alcatel OmniSwitch AOS
                             22 November 2002


        AusCERT Security Bulletin Summary

Product:                Alcatel AOS 5.1.1
Vendor:                 Alcatel
Platform:               Alcatel OmniSwitch 7700
                        Alcatel OmniSwitch 7800
Impact:                 Administrator Compromise
                        Denial of Service
                        Access Confidential Data
Access Required:        Remote

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CERT Advisory CA-2002-32 Backdoor in Alcatel OmniSwitch AOS

   Original release date: November 21, 2002
   Last revised: --
   Source: CERT/CC, Alcatel

   A complete revision history can be found at the end of this file.

Systems Affected

     * Alcatel  OmniSwitch  7700/7800  switches running Alcatel Operating
       System (AOS) version 5.1.1


   Alcatel has recently discovered a serious vulnerability in AOS version
   5.1.1.   Exploitation   of   this   vulnerability  can  lead  to  full
   administrative control of the device running AOS.

I. Description

   AOS  typically  runs  on  network  infrastructure devices, such as the
   Alcatel OmniSwitch 7000 series switch. According to Alcatel:

     During an NMAP audit of the AOS 5.1.1 code that runs on the Alcatel
     OmniSwitch  7700/7800  LAN  switches,  it  was  determined a telnet
     server  was listening on TCP port number 6778. This was used during
     development to access the Wind River Vx-Works operating system. Due
     to  an  oversight,  this  access  was  not removed prior to product

   Further   information   about  this  vulnerability  may  be  found  in
   VU#181721. This issue is also being referenced as CAN-2002-1272:


II. Impact

   An  attacker  can  gain  full access to any device running AOS version
   5.1.1,  which  can  result  in,  but  is  not limited to, unauthorized
   access,  unauthorized  monitoring,  information  leakage, or denial of

III. Solution

Upgrade to AOS 5.1.1.R02 or AOS 5.1.1.R03

   Contact Alcatel's customer support for the updated AOS.


   Block access to port 6778/TCP at your network perimeter.

Appendix A. - Vendor Information

   VU#181721  was  written  by  Alcatel.  As  new  vendor  information is
   reported to the CERT/CC, we will update VU#181721 and note the changes
   in our revision history.

Appendix B. - References

    1. VU#181721:   Alcatel  OmniSwitch  7700/7800  does  not  require  a
       password for accessing the telnet server -

    2. OmniSwitch_7000_brief -

    3. CAN-2002-1272 -

   We  thank  Olivier  Paridaens  and Jeff Hayes of Alcatel for reporting
   this issue.

   Author: Ian A. Finlay.

   This document is available from:

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   Revision History
November 21, 2002: Initial release

Version: PGP 6.5.8


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