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Category:   Application (Security)  >   Apache HTTPD Vendors:   HPE
(HP Issues Fix for Apach on HP-UX) OpenSSL SSL/TLS Handshade Flaws May Let Remote Users Crash OpenSSL-based Applications
SecurityTracker Alert ID:  1009941
SecurityTracker URL:  http://securitytracker.com/id/1009941
CVE Reference:   CVE-2004-0079, CVE-2004-0112   (Links to External Site)
Date:  Apr 26 2004
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 2.03
Description:   Some vulnerabilities were reported in OpenSSL, primarily involving the processing of SSL/TLS protocol handshakes. A remote user can cause OpenSSL to crash.

It is reported that there is a null-pointer assignment in the do_change_cipher_spec() function [CVE: CVE-2004-0079]. A remote user can perform a specially crafted SSL/TLS handshake with a target server to cause OpenSSL to crash on the target system. This may cause the application using OpenSSL to crash.

All versions of OpenSSL from 0.9.6c to 0.9.6k inclusive and from 0.9.7a to 0.9.7c inclusive are reportedly vulnerable to this null-pointer bug.

It is also reported that there is a flaw in performing SSL/TLS handshakes using Kerberos ciphersuites [CVE: CVE-2004-0112]. A remote user can perform a specially crafted SSL/TLS handshake against a server that is using Kerberos ciphersuites to cause OpenSSL to crash on the target system.

OpenSSL versions 0.9.7a, 0.9.7b, and 0.9.7c are reported to be vulnerable to this Kerberos handshake bug.

It is also reported that a remote user may be able to cause OpenSSL to enter an infinite loop due to a flaw in a patch introduced in 0.9.6d [CVE: CVE-2004-0081].

The vendor credits Dr. Stephen Henson of the OpenSSL core team as well as Codenomicon for supplying their TLS Test Tool and Joe Orton of Red Hat for performing the majority of the testing.

Impact:   A remote user can cause OpenSSL to crash, which may cause an application using OpenSSL to crash. The specific impact depends on the application that uses the OpenSSL library.
Solution:   HP has issued a fix for HP-UX. For customers using HPApache/B9416BA and hpuxwsAPACHE/hpuxwsApache, HP has incorporated the fixed OpenSSL 0.9.7d in hp-ux apache-based web server v.2.03 or later, available at:

http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/displayProductInfo.pl?productNumber=HPUXWSSUITE

See the Source Message for installation instructions.

Vendor URL:  www2.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX01019 (Links to External Site)
Cause:   Boundary error, Exception handling error, State error
Underlying OS:  UNIX (HP/UX)
Underlying OS Comments:  HP-UX B.11.00, B.11.11, B.11.22, B.11.23

Message History:   This archive entry is a follow-up to the message listed below.
Mar 17 2004 OpenSSL SSL/TLS Handshade Flaws May Let Remote Users Crash OpenSSL-based Applications



 Source Message Contents

Subject:  http://www2.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX01019


http://www2.itrc.hp.com/service/cki/docDisplay.do?docId=HPSBUX01019

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


HP SECURITY BULLETIN


HPSBUX01019     REVISION: 0

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


- -----------------------------------------------------------------
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.

INITIAL RELEASE:  26 April 2004

LAST UPDATED: 25 April 2004

POTENTIAL SECURITY IMPACT:    Remote denial of service

SOURCE:    HEWLETT-PACKARD COMPANY
HP Software Security Response Team

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


VULNERABILITY SUMMARY:
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.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0079

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.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0112


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, 2.0.43.04 or earlier
(HPApache/B9416AA). This product includes OpenSSL 0.9.6b.

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

- - hp apache-based web server, 2.0.43.04 (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.


BACKGROUND:

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

AFFECTED VERSIONS

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
=============

HPApache.APACHE2
hpuxwsAPACHE.APACHE2
action: install hp-ux apache-based web server, v.2.03 or later

END AFFECTED VERSIONS


RESOLUTION:

The OpenSSL group has released patches to fix the vulnerabilities
inOpenSSL 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

http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
displayProductInfo.pl?productNumber=HPUXWSSUITE

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 2.0.39.01.02 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

hpapache2conf

hpws_apache[32]conf

Please write to security-alert@hp.com to request a PGP signed
version of this bulletin.

MANUAL ACTIONS:  Yes - Update

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


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

SUBSCRIBE: To initiate a subscription to receive future HP
Security Bulletins via Email:
http://h30046.www3.hp.com/driverAlertProfile.php?regioncode=
NA&langcode=USENG&jumpid=in_SC-GEN__driverITRCtopiccode=ITRC
On the web page: Driver and Support Alerts/Notifications Sign-up:
Product Selection
Under Step1: your products
1. Select product category: - a minimum of servers must be
selected.
2. Select product family or search: - a minimum of one product
must be selected.
3. Add a product: - a minimum of one product must be added.
In Step 2: your operating system(s) - check ALL operating systems
for which alerts are required.
Complete the form and Save.

To update an existing subscription:
http://h30046.www3.hp.com/subSignIn.php
Log in on the web page Subscriber's choice for Business: sign-in.
On the Web page: Subscriber's Choice: your profile summary - use
Edit Profile to update appropriate sections.

Note: In addition to the individual alerts/notifications for the
selected operating systems/products, subscribers will
automatically receive one copy of alerts for non-operating 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).

HP-UX SPECIFIC SECURITY BULLETINS*:
To review previously published Security Bulletins for HP-UX:
http://itrc.hp.com/cki/bin/doc.pl/screen=ckiSecurityBulletin

The HP-UX Security Patch Matrix is available here:
http://itrc.hp.com/service/cki/docDisplay.do?docId=
hpuxSecurityMatrix
Or via anonymous ftp:
ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/

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:
http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
displayProductInfo.pl?productNumber=B6834AA

REPORT: To report a potential security vulnerability with any HP
supported product, send Email to: security-alert@hp.com. 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 security-alert@hp.com with the Subject of
'get key' (no quotes).
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.

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