SSRT3614 - HP OpenCall Multiservice Controller (OCMC) DoS (Denial of Service)

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SSRT3614 - HP OpenCall Multiservice Controller (OCMC)
           DoS (Denial of Service)

 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.

 25 March 2004

Remote Denial of Service (DoS)

HP Software Security Response Team

REFERENCES:    CERT CA-2004-01,CISCO Advisory 47843


A potential security vulnerability has been identified in the
HP OpenCall MultiService Controller (OCMC) H.323 stack that may
allow a remote user to create a Denial of Service (DoS).

SUPPORTED SOFTWARE VERSIONS*:  ONLY impacted versions are listed.

All versions HP OCMC v1.2 and HP OCMC v1.1 for HP-UX 11.0

The HP Software Security Response team has contacted
the source and various other vendors and is not aware
of any malicious exploitation of any of the vulnerabilities
described in this bulletin.

A test suite developed by the U.K. National Infrastructure
Security Co-ordination Centre (NISCC) and the University of Oulu
Security Programming Group (OUSPG) has exposed vulnerabilities in
several implementations of the H.323 protocol.

The potential vulnerabilities may be exploited to produce a denial
of service (DoS) attack.   Such an attack may cause an affected
product to failover or crash and failover.   Due to its robust
design OCMC will recover from most attack scenarios.  In the event
that OCMC does not recover, the attack can be stopped by blocking
the offending IP address.   Attacks may also be blocked by
creating an access list to restrict TCP port 1720 traffic to
known, trusted IP addresses.


HP will be providing patches to the impacted versions of OCMC:

    OCMC v1.2 released January 2004
    OCMC v1.1 patch 46
    OCMC v1.1 patch 37

This bulletin will be revised as the patches become available
and patches will be available from the normal HP Services
support channel.

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


* 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=Virtual Vault

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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.
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either express or implied, including the warranties of
merchantability and fitness for a particular purpose, title
and non-infringement."

(c)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,
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Version: PGP 8.0.2


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


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