SSRT3622 rev.0 HP-UX remote denial of service using AAA Server

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SSRT3622 rev.0 HP-UX remote denial of service using AAA Server

NOTICE: There are no restrictions for distribution of this
Bulletin provided that it remains complete and intact.
The information in this Security bulletin should be acted
upon as soon as possible.


LAST UPDATED: 8 April 2004

POTENTIAL SECURITY IMPACT:    Remote denial of service

         HP Software Security Response Team

REFERENCES:  CAN-2004-0079, CAN-2004-0112, CAN-2004-0081,
CERT TA04-078A

A potential security vulnerability has been identified with
the HP-UX AAA server where an unauthenticated remote attacker
could cause a denial of service.

SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.

HP-UX B.11.00, and B.11.11 running HP-UX AAA Server A.
or earlier.

HP-UX B.11.23 running HP-UX AAA Server A.

The HP-UX AAA Server uses components of the OpenSSL functions
internally and is therefore vulnerable to  the following items.

CAN-2004-0079: Testing performed by the OpenSSL group using
the Codenomicon TLS Test Tool uncovered a null-pointer
assignment in the do_change_cipher_spec() function.  A remote
attacker could perform a carefully crafted SSL/TLS handshake
against a server that used the OpenSSL library in such a way
as to cause OpenSSL to crash. Depending on the application this
could lead to a denial of service. All versions of OpenSSL from
0.9.6c to 0.9.6k inclusive and from 0.9.7a to 0.9.7c inclusive
are affected by this issue.

CAN-2004-0112: Stephen Henson discovered a flaw in SSL/TLS
handshaking code when using Kerberos ciphersuites.  A remote
attacker could perform a carefully crafted SSL/TLS handshake
against a server configured to use Kerberos ciphersuites in
such a way as to cause OpenSSL to crash. Most applications have
no ability to use Kerberos ciphersuites and will therefore be
unaffected. Versions 0.9.7a, 0.9.7b, and 0.9.7c of OpenSSL are
affected by this issue.

CAN-2004-0081: Testing performed by the OpenSSL group using
the Codenomicon TLS Test Tool uncovered a bug in older versions
of OpenSSL 0.9.6 that can lead to a Denial of Service attack
(infinite loop). This issue was traced this to a fix that was
added to OpenSSL 0.9.6d some time ago.


Note: To determine if a system has an affected version, search
the output of "swlist -a revision -l fileset"
for an affected fileset. Then determine if the recommended patch
or update is installed.

HP-UX B.11.23
HP-UX B.11.11
HP-UX B.11.00
action: install revision A. or subsequent.



For HP-UX releases B.11.00, B.11.11, and B.11.23, download
a new HP-UX AAA Server product A. or later from

in order to completely resolve these issues.  This product
includes OpenSSL 0.9.7c + patch.

Please write to to request a PGP
signed version of this bulletin.

Go to ?

to download a current version of the HP-UX AAA Server software.

* The software product category that this Security Bulletin
relates to is represented by the 5th and 6th characters of the
Bulletin number:
GN=General, MA=Management Agents, MI=Misc. 3rd party,
MP=HP-MPE/iX, NS=HP NonStop Servers, OV=HP OpenVMS,
PI=HP Printing & Imaging, ST=HP Storage, TU=HP Tru64 UNIX,
TL=Trusted Linux, UX=HP-UX, VV=VirtualVault

SUPPORT: For further information, contact HP Services support

SUBSCRIBE: To initiate a subscription to receive future HP
Security Bulletins via Email:

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Sign-up: Product Selection
Under Step1: your products
1. Select product category: - a minimum of servers must be
2. Select product family or search: - a minimum of one product
   must be selected.
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In Step 2: your operating system(s) - check ALL operating
systems for which alerts are required.
Complete the form and Save.

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system categories (i.e., a subscriber who signs up for all
six operating system alerts will only receive one copy of
all the non-operating system alerts).

To review previously published Security Bulletins for HP-UX:

The HP-UX Security Patch Matrix is available here: =
Or via anonymous ftp: /

The HP-UX Security Patch Matrix, updated daily, categorizes
security patches by platform/OS release, and by Bulletin topic.
The Security Patch Check tool completely automates the process
of reviewing the Security Patch Matrix for HP-UX 11.XX Versions.
NOTE: Installing patches listed in the Security Patch Matrix will
completely implement the RESOLUTION in the Security Bulletin
_only_ if there are no MANUAL ACTIONS included.

The Security Patch Check tool can also verify that a Security
Bulletin RESOLUTION has been implemented on HP-UX 11.XX Versions
provided that no MANUAL ACTIONS were included. The Security Patch
Check tool cannot verify patches implemented via product upgrade.

For information on the Security Patch Check tool, see: /

REPORT: To report a potential security vulnerability with any
HP supported product, send email to:

System management and security procedures must be reviewed
frequently to maintain system integrity.  HP is continually
reviewing and enhancing the security features of software
products to provide customers with current secure solutions.

"HP is broadly distributing this Security Bulletin in order
to bring to the attention of users of the affected HP products
the important security information contained in this Bulletin.
HP recommends that all users determine the applicability of
this information to their individual situations and take
appropriate action. HP does not warrant that this information
is necessarily accurate or complete for all user situations
and, consequently, HP will not be responsible for any damages
resulting from user's use or disregard of the information
provided in this Bulletin. To the extent permitted by law, HP
disclaims all warranties, either express or implied, including
the warranties of merchantability and fitness for a particular
purpose, title and non-infringement."

Copyright 2004 Hewlett-Packard Development Company, L.P.
Hewlett-Packard Company shall not be liable for technical or
editorial errors or omissions contained herein.  The information
provided is provided "as is" without warranty of any kind. To
the extent permitted by law, neither HP or its affiliates,
subcontractors or suppliers will be liable for incidental,
special or consequential damages including downtime cost; lost
profits; damages relating to the procurement of substitute
products or services; or damages for loss of data, or software
restoration. The information in this document is subject to
change without notice.  Hewlett-Packard Company and the names of
Hewlett-Packard products referenced herein are trademarks of
Hewlett-Packard Company in the United States and other countries.
Other product and company names mentioned herein may be
trademarks of their respective owners.

Version: PGP 8.0


Yours truly,
HP S/W Security Team
WTEC Cupertino, California


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