SSRT4717 rev.2 Remote denial of service in Apache OpenSSL SSL/TLS

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SSRT4717 rev.2 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:    07 July 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.
HP-UX B.11.00, B.11.11, B.11.22, and B.11.23 running the
hpuxwsAPACHE HP-UX Apache-based Web Server.



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.


     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.

      For IPv4:
      HP-UX B.11.00
      HP-UX B.11.11
      action: install revision A. or subsequent

      HP-UX B.11.22
      action: migrate to B.11.23

      For IPv6:
      HP-UX B.11.11
      action: install revision B. or subsequent

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

      HP-UX B.11.04 Virtualvault A.04.70
      action: install PHSS_30639 or subsequent

      action: install PHSS_30640 or subsequent

      action: install PHSS_30641 or subsequent

      action: install PHSS_30642 or subsequent

      HP-UX B.11.04 Virtualvault A.04.60
      action: install PHSS_30643 or subsequent

      action: install PHSS_30644 or subsequent

      action: install PHSS_30645 or subsequent
      action: install PHSS_30646 or subsequent

      HP-UX B.11.04 Virtualvault A.04.50
      action: install PHSS_30647 or subsequent

      action: install PHSS_30648 or subsequent

      HP-UX B.11.04 HP Webproxy A.02.10
      action: install PHSS_30649 or subsequent

      HP-UX B.11.04 HP Webproxy A.02.00
      action: install PHSS_30650 or subsequent


For B.11.04 HP has made the following patches available:

    PHSS_30639 Virtualvault 4.7 IWS update
    PHSS_30640 Virtualvault 4.7 OpenSSH update
    PHSS_30641 Virtualvault 4.7 OWS update
    PHSS_30642 Virtualvault 4.7 TGP update
    PHSS_30643 Virtualvault 4.6 IWS update
    PHSS_30644 Virtualvault 4.6 OpenSSH update
    PHSS_30645 Virtualvault 4.6 OWS update
    PHSS_30646 Virtualvault 4.6 TGP update
    PHSS_30647 Virtualvault 4.5 IWS Update
    PHSS_30648 Virtualvault 4.5 OWS update
    PHSS_30649 Webproxy server 2.1 update
    PHSS_30650 Webproxy server 2.0 update

Note: 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.
     Please write to for more information.

For B.11.00, B.11.11, and B.11.23:

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

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

Download and Install Apache

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

- - Download Apache from Software Depot:

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

- - Use SD to swinstall the depot.

   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 prefer to remove Apache from your system instead of
installing 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.

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



MANUAL ACTIONS:  Yes - NonUpdate
Install the recommended product.

Revision 1 - Corrected the affected versions in the Background

                      Note: Several Apache security bulletins
                      are being revised to correct the affected
                      versions specification.

Revision 2 - Added B.11.04.

* 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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To review previously published Security Bulletins for HP-UX:

Security Patch Check revision B.02.00 analyzes all HP-issued
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For more information:
< />

REPORT: To report a potential security vulnerability with any HP
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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
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
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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
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respective owners.

Version: PGP 8.0.2


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


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