Operating System:

Published:

03 July 2002

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

            ESB-2002.331 -- Compaq Security Advisory (SSRT2263)
   HP Tru64 UNIX V5.1a - SSH V1.1 & OpenSSH Challenge Response Handling,
                     Potential Security Vulnerability
                                4 July 2002

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                OpenSSH 2.3.1p1 through 3.3
Vendor:                 Compaq
Impact:                 Execute Arbitrary Code/Commands
Access Required:        Remote

Ref:                    AL-2002.05
                        AA-2002.05
                        ESB-2002.321

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SECURITY BULLETIN  SSRT2263  REVISION: 0

TITLE:   SSRT2263 HP Tru64 UNIX V5.1a - SSH V1.1 & OpenSSH Challenge
         Response Handling, Potential Security Vulnerability

NOTICE: There are no restrictions for distribution of this
        Bulletin provided that it remains complete and intact.

RELEASE DATE: 3 July, 2002

SEVERITY:  2

SOURCE:  Compaq Computer Corporation,
         a wholly-owned subsidiary of
         Hewlett-Packard Company and
         Hewlett-Packard Company HP Services
         Software Security Response Team

REFERENCE:  CERT CA-2002-18
 
PROBLEM SUMMARY:
  Compaq has been following the OpenSSH remote vulnerability
  that was announced June 26, 2002 and have determined that
  this issue is specific to OpenSSH and does not impact
  SSH V1.1 distributed with HP Tru64 UNIX V5.1a.

  HP Tru64 Unix V5.1a - SSH V1.1 implementation is not based
  on the OpenSSH product.  The issue described in this recent
  OpenSSH advisory is in the challenge response phase of S/Key
  or BSD_Auth authentication processes. HP Tru64 UNIX V5.1a
  - SSH V1.1 implementation uses SIA for its password
  authentication and does not support S/Key.  Our conclusion
  is based on the additional information that was released by
  the ISS X-Force and information provided by openssh.org
  ( http://www.openssh.com/  )  regarding this vulnerability.



VERSIONS IMPACTED:

  o OpenSSH versions 2.3.1p1 through 3.3

  o HP 9000 Servers running HP-UX release 11.00, and 11.11 only
    with the T1471AA SSH product installed. Please refer to the
    HP Security Bulletin HPSBUX0206-195, Sec. Vulnerability in
    OpenSSH on HP-UX  available on http://itrc.hp.com in the
    Support Digests, under Archives. 

NOT Impacted: 

  o HP Tru64 Unix V5.1a   -  SSH V1.1

  o HP NonStop Servers

  o HP OpenVMS


RESOLUTION:
  For customers using OpenSSH V2.9.9 and V3.3 on HP Tru64 Unix
  systems, HP recommends that you follow the procedures listed
  in the OpenSSH security advisory at web site
  http://www.openssh.com/ to correct the potential vulnerability.


SUPPORT: For further information, contact HP Services.


SUBSCRIBE:

 To subscribe to automatically receive future Security Advisories
 from the Software Security Response Team via electronic mail:
 http://www.support.compaq.com/patches/mailing-list.shtml



REPORT:

 To report a potential security vulnerability with any Compaq
 supported product, send email to: mailto:security-ssrt@compaq.com
 or mailto:security-alert@hp.com

 HP and Compaq appreciate your cooperation and patience. As always,
 HP and Compaq urge you to periodically review your system management
 and security procedures. HP and Compaq will continue to review and
 enhance the security features of its products and work with our
 customers to maintain and improve the security and integrity of
 their systems.

 "HP and Compaq are broadly distributing this Security Bulletin in
 order to bring to the attention of users of the affected Compaq
 products the important security information contained in this
 Bulletin. HP and Compaq recommend that all users determine the
 applicability of this information to their individual situations
 and take appropriate action. Neither HP nor Compaq warrant that
 this information is necessarily accurate or complete
 for all user situations and, consequently, neither HP nor Compaq
 will be responsible for any damages resulting from user's use
 or disregard of the information provided in this Bulletin."

 Copyright 2002 Compaq Information Technologies Group, L.P.
 Compaq shall not be liable for technical or editorial errors or
 omissions contained herein. The information in this document is
 subject to change without notice. Compaq and the names of Compaq
 products referenced herein are trademarks of Compaq Information
 Technologies Group, L.P. in the United States and other countries.
 Other product and company names mentioned herein may be trademarks
 of their respective owners.

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