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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
AusCERT Security Bulletin Summary
Product: OpenSSH 2.3.1p1 through 3.3
Impact: Execute Arbitrary Code/Commands
Access Required: Remote
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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
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
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.
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.
o HP Tru64 Unix V5.1a - SSH V1.1
o HP NonStop Servers
o HP OpenVMS
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.
To subscribe to automatically receive future Security Advisories
from the Software Security Response Team via electronic mail:
To report a potential security vulnerability with any Compaq
supported product, send email to: mailto:email@example.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
"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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