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SSRT5971 rev.0 - HP Tru64 Unix FTP Daemon (ftpd) Remote Denial of
Service (DoS)

The information in this Security Bulletin should be acted upon
as soon as possible.

19 September 2005

Remote Denial of Service (DoS)

Hewlett-Packard Company
HP Software Security Response Team

A potential security Vulnerability has been identified with the
HP Tru64 UNIX ftp daemon (File Transfer Protocol server daemon).
Under certain circumstances, remote authorized users could
cause an ftp server to become unresponsive.


SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed.
HP Tru64 UNIX 5.1B-3
HP Tru64 UNIX 5.1B-2/PK4
HP Tru64 UNIX 5.1A PK
HP Tru64 UNIX 4.0G PK4
HP Tru64 UNIX 4.0F PK8



Until the resolutions are available in a mainstream release patch
kit, HP is releasing the following Early Release Patch (ERP) kits
publicly for use by any customer.

The ERP kits use dupatch to install and will not install over any
installed Customer Specific Patches (CSPs) that have file
intersections with the ERPs.

Please contact your service provider for assistance if the ERP
installation is blocked by any of your installed CSPs.

The resolutions contained in the ERP kits are scheduled to be
available in the following mainstream patch kit:

HP Tru64 UNIX 5.1B-4

Early Release Patches

The ERPs deliver the following file:


Kits are available for the following versions.

HP Tru64 UNIX 5.1B-3
ERP Kit Name: T64KIT0026411-V51BB26-ES-20050912
Kit Location:
MD5 checksum: 58d9ee9767b23426d35787875bb6acb0

HP Tru64 UNIX 5.1B-2/PK4
ERP Kit Name: T64KIT0026414-V51BB25-ES-20050912
Kit Location:
MD5 checksum: a86e8bc3fea2f62471ede2cef0c9f02e

HP Tru64 UNIX 5.1A PK6
ERP Kit Name: T64KIT0026413-V51AB24-ES-20050912
Kit Location:
MD5 checksum: 2a00df40f1c3c38aed89d60943940fb6

HP Tru64 UNIX 4.0G PK4
ERP Kit Name: T64KIT0026424-V40GB22-ES-20050913
Kit Location:
MD5 checksum: 2dbfa6af9945cf97cef3056e1fe90db3

HP Tru64 UNIX 4.0F PK8
Kit Location:
MD5 checksum: f31c7a6d8907f66bb6292d9fd45b22a3

General ITRC Patch Page:

Revision 0: 19 September 2005
Initial Release

SUPPORT: For further information, contact normal HP Services
support channel.

REPORT: To report a potential security vulnerability with any HP
supported product, send Email to: It is
strongly recommended that security related information being
communicated to HP be encrypted using PGP, especially exploit
information. To obtain the security-alert PGP key please send an
e-mail message to with the Subject of
'get key' (no quotes).

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To review previously published Security Bulletins visit:

* The Software Product Category that this Security Bulletin
relates to is represented by the 5th and 6th characters of the
Bulletin number:
GN = HP General SW,
MA = HP Management Agents,
MI = Misc. 3rd party SW,
NS = HP NonStop Servers,
OV = HP OpenVMS,
PI = HP Printing & Imaging,
ST = HP Storage SW,
TL = HP Trusted Linux,
TU = HP Tru64 UNIX,
VV = HP Virtual Vault

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."

(c)Copyright 2005 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 nor 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.