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

From: CERT Advisory (cert-advisory@cert.org)
Date: 11/21/02

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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

    Overview

       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
         release.

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

         http://cve.mitre.org/cgi-bin/cvename.cgi?name=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
       service.

    III. Solution

    Upgrade to AOS 5.1.1.R02 or AOS 5.1.1.R03

       Contact Alcatel's customer support for the updated AOS.

    Workarounds

       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 -
           http://www.kb.cert.org/vuls/id/181721

        2. OmniSwitch_7000_brief -
           http://www.ind.alcatel.com/nextgen/OmniSwitch_7000_brief.pdf

        3. CAN-2002-1272 -
           http://cve.mitre.org/cgi-bin/cvename.cgi?name=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:
       http://www.cert.org/advisories/CA-2002-32.html
       ______________________________________________________________________

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       Revision History
    November 21, 2002: Initial release

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