SSRT4717 rev.0 Remote denial of service in Apache OpenSSL SSL/TLS

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SSRT4717 rev.0 Remote denial of service in Apache OpenSSL SSL/TLS

 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.

INITIAL RELEASE:    25 April 2004

POTENTIAL SECURITY IMPACT:    Remote denial of service

HP Software Security Response Team

REFERENCES:    CAN-2003-0079, CAN-2004-0112, CERT TA04-078A


Two potential security vulnerabilities have been identified in
OpenSSL by NISCC (224012/1 and 224012/2).   The Common
Vulnerabilities and Exposures project  <
has referenced them as the following CAN-2004-0079, and
CAN-2004-0112.  The CERT summary is TA04-078A.

1. The do_change_cipher_spec function in OpenSSL allows remote
   attackers to cause a denial of service via a crafted SSL/TLS
   handshake that triggers a null dereference.

2. The SSL/TLS handshaking, when using Kerberos ciphersuites, does
   not properly check the length of Kerberos tickets during a
   handshake, which allows remote attackers to cause a denial of
   service via a crafted SSL/TLS handshake that causes an
   out-of-bounds read.

SUPPORTED SOFTWARE VERSIONS*:  ONLY impacted versions are listed.

HP9000 Servers running HP-UX release B.11.00, B.11.11, B.11.22,
and B.11.23 with versions of the following products are affected,
and represented as:
  product-name, version (product-tag/bundle-tag)

- - hp apache-based web server, or earlier
  (HPApache/B9416AA). This product includes OpenSSL 0.9.6b.

- - hp-ux apache-based web server, v.2.01 or earlier
  This product includes OpenSSL 0.9.7c.

- - hp apache-based web server, (with IPv6 support) or
  earlier (HPApache/B9416BA).
  This product includes OpenSSL 0.9.6b.

- - hp-ux apache-based web server(with IPv6 support), v.2.01 or
  earlier (hpuxwsAPACHE/hpuxwsApache).
  This product includes OpenSSL 0.9.7c.


Two potential security vulnerabilities have been identified in
OpenSSL by NISCC ((224012/1 and 224012/2).   The Common
Vulnerabilities and Exposures project <
has referenced them as CAN-2004-0079 and CAN-2004-0112.


The following is a list of affected filesets or patches and fix
information.  To determine if a system has an affected version,
search the output of  "swlist -a revision -l fileset" for an
affected fileset or patch, then determine if a fixed revision or
applicable patch is installed.

HP-UX B.11.00

HP-UX B.11.11

HP-UX B.11.22

HP-UX B.11.23




action: install hp-ux apache-based web server, v.2.03 or later



The OpenSSL group has released patches to fix the vulnerabilities
in OpenSSL 0.9.7d.  For customers using HPApache/B9416BA and
hpuxwsAPACHE/hpuxwsApache, HP has incorporated OpenSSL 0.9.7d in
the following product:

- - hp-ux apache-based web server v.2.03 or later /

Support ended for HP-UX Web Server Suite for HP-UX 11i v1.6
(11.22) after March 31, 2004.   Starting from this release HP-UX
Web Server Suite for HP-UX 11i v1.6 (11.22) is no longer available
or supported.  Users of HP-UX Web Server Suite on HP-UX 11i v1.6
are encouraged to update to HP-UX 11i v2 (11.23) and install the
latest HP-UX Web Server Suite for HP-UX 11i v2.

Check for Apache Installation

- -----------------------------

To determine if the Apache web server from HP is installed on your
system, use Software Distributor's swlist command. All three
versions products may co-exist on a single system.

For example, the results of the command

swlist -l product | grep -i apache

HPApache HP Apache-based Web Server

hpuxwsAPACHE A.2.01 HP-UX Apache-based Web Server

Stop Apache

- -----------------------------

Before updating, make sure to stop any previous Apache binary.
Otherwise, the previous binary will continue running, preventing
the new one from starting, although the installation would be
successful.  After determining which Apache is installed, stop
Apache with the following commands:

for HPApache: /opt/hpapache2/bin/apachectl stop

for hpuxwsAPACHE: /opt/hpws/apache[32]/bin/apachectl stop

Download and Install Apache

- -----------------------------

- - Download Apache from Software Depot using the previously
  mentioned links.

- - Verify successful download by comparing the cksum with the value
  specified on the installation web page.

- - Use SD to swinstall the depot.

- - For customers with HPApache/B9416BA installed, migrate to
  hpuxwsAPACHE/hpuxwsApache and remove the affected products from
  the system.  Installation of this new version of HP Apache over
  an existing HP Apache installation is supported, while
  installation over a non-HP Apache is NOT supported.

Removing Apache Installation

- ----------------------------

If you rather remove Apache from your system than install a newer
version to resolve the security problem, use both Software
Distributor's "swremove" command and also "rm -rf" the home
location as specified in the rc.config.d file "HOME" variables.
To find the files containing HOME variables in the
/etc/rc.config.d directory:

%ls /etc/rc.config.d | grep apache




Yes - Update

Install the product containing the fix.

For customers with HPApache/B9416AA HPApache/B9416BA installed,
the fix requires migration to hpuxwsAPACHE/hpuxwsApache and
removing the affected products from the system.

* 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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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
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NOTE: Installing patches listed in the Security Patch Matrix will
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For information on the Security Patch Check tool, see: /

REPORT: To report a potential security vulnerability with any HP
supported product, send Email to: It is
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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 2004 Hewlett-Packard Development Company, L.P.
Hewlett-Packard Company shall not be liable for technical or
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The information in this document is subject to change without
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products referenced herein are trademarks of Hewlett-Packard
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and company names mentioned herein may be trademarks of their
respective owners.

Version: PGP 8.0.2


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


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