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Home » Hacking News » Hewlett Packard SSRT3623: Apache vulnerabilities

Hewlett Packard SSRT3623: Apache vulnerabilities

by Nikola Strahija on September 3rd, 2003 Several vulnerabilities have been found in Apache HTTP server. Users are strongly advised to apply the appropriate patches.

Hash: SHA1

Originally issued: 03 Sept 2003
SSRT3623 Security Vulnerabilities in Apache HTTP Server
NOTICE: There are no restrictions for distribution of this
Bulletin provided that it remains complete and intact.

The information in the following Security Bulletin should be
acted upon as soon as possible. Hewlett-Packard Company will
not be liable for any consequences to any customer resulting
from customer's failure to fully implement instructions in this
Security Bulletin as soon as possible.

PROBLEM: 1. Certain sequences of per-directory renegotiations and
the SSLCipherSuite directive being used to upgrade
from a weak ciphersuite to a strong one could result
in the weak ciphersuite being used in place of the
strong one.
More details are available at:

2. Certain errors returned by accept() on rarely
accessed ports could cause temporal denial of service,
due to a bug in the prefork MPM.

More details are available at:

3. Denial of service was caused when target host is IPv6
but ftp proxy server can't create IPv6 socket.

More details are available at:

4. The server would crash when going into an infinite
loop due to too many subsequent internal redirects
and nested subrequests.

More details are available at:

IMPACT: Potential Denial of Service

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

- hp apache-based web server (with IPv6 support),
or earlier (HPApache/B9416BA)
This product includes Apache 2.0.43.

- hp-ux apache-based web server(with IPv6 support),
v. or earlier (hpuxwsAPACHE/hpuxwsApache)
This product includes Apache 2.0.43.

SOLUTION: For HP-UX releases 11.11 download new HP Apache product
from :

For HPApache/B9416AA, HPApache/B9416BA and
hpuxwsAPACHE/hpuxwsApache download the update.

- hp-ux apache-based web server (with IPv4)
NO actions required

- hp-ux apache-based web server(with IPv6 support),
v. or later (hpuxwsAPACHE/hpuxwsApache)
This product includes Apache 2.0.46.

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

AVAILABILITY: Complete product bundles are available now on

A. Background
The Common Vulnerabilities and Exposures project
has identified potential
vulnerabilities in the Apache HTTP Server (CAN-2003-0192,
CAN-2003-0253, and CAN-2003-0254). It affects the
following HP product numbers / versions on HP-UX
releases 11.11:

- hp apache-based web server, (with IPv6 support)
or earlier (HPApache/B9416BA)

- hp-ux apache-based web server (with IPv6 support),
v. or earlier (hpuxwsAPACHE/hpuxwsApache)


The affected filesets are: (product.fileset)
HPApache.APACHE2 2.0.36 and subsequent for IPv6
hpuxwsAPACHE.APACHE2 2.0.43 and subsequent for IPv6

fix: revision 2.0.47 or subsequent for IPv6


B. Recommended solution
The Apache Software Foundation has released Apache 2.0.47 as
the best known version that fixes the problems identified in
the above mentioned issues.

For customers using HPApache/B9416BA and hpuxwsAPACHE /
hpuxwsApache, HP has incorporated Apache 2.0.47 in the
following product:
- hp-ux apache-based web server v. or later

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. 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/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"

To find the files containing HOME variables in the
/etc/rc.config.d directory:

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

C. To subscribe to automatically receive future NEW HP Security
Bulletins from the HP IT Resource Center via electronic
mail, do the following:

Use your browser to get to the HP IT Resource Center page

Use the 'Login' tab at the left side of the screen to login
using your ID and password. Use your existing login or the
"Register" button at the left to create a login, in order to
gain access to many areas of the ITRC. Remember to save the
User ID assigned to you, and your password.

In the left most frame select "Maintenance and Support".

Under the "Notifications" section (near the bottom of
the page), select "Support Information Digests".

To -subscribe- to future HP Security Bulletins or other
Technical Digests, click the check box (in the left column)
for the appropriate digest and then click the "Update
Subscriptions" button at the bottom of the page.


To -review- bulletins already released, select the link
(in the middle column) for the appropriate digest.

NOTE: Using your itrc account security bulletins can be
found here:

To -gain access- to the Security Patch Matrix, select
the link for "The Security Bulletins Archive". (near the
bottom of the page) Once in the archive the third link is
to the current Security Patch Matrix. Updated daily, this
matrix categorizes security patches by platform/OS release,
and by bulletin topic. Security Patch Check completely
automates the process of reviewing the patch matrix for
11.XX systems. Please note that installing the patches
listed in the Security Patch Matrix will completely
implement a security bulletin _only_ if the MANUAL ACTIONS
field specifies "No."

The Security Patch Check tool can verify that a security
bulletin has been implemented on HP-UX 11.XX systems providing
that the fix is completely implemented in a patch with no
manual actions required. The Security Patch Check tool cannot
verify fixes implemented via a product upgrade.

For information on the Security Patch Check tool, see:

The security patch matrix is also available via anonymous

On the "Support Information Digest Main" page:
click on the "HP Security Bulletin Archive".

The PGP key used to sign this bulletin is available from
several PGP Public Key servers. The key identification
information is:

HP Security Response Team (Security Bulletin signing only)

Fingerprint =
6002 6019 BFC1 BC62 F079 862E E01F 3AFC 2D2A 7D59

If you have problems locating the key please write to
[email protected] Please note that this key is
for signing bulletins only and is not the key returned
by sending 'get key' to [email protected]

D. To report new security vulnerabilities, send email to

[email protected]

Please encrypt any exploit information using the
security-alert PGP key, available from your local key
server, or by sending a message with a -subject- (not body)
of 'get key' (no quotes) to [email protected]


(c)Copyright 2003 Hewlett-Packard Company
Hewlett-Packard Company shall not be liable for technical or
editorial errors or omissions contained herein. The information
in this document is subject to change without notice.
Hewlett-Packard Company and the names of HP products referenced
herein are trademarks and/or service marks of Hewlett-Packard
Company. Other product and company names mentioned herein may be
trademarks and/or service marks of their respective owners.

- --

Version: PGP 8.0


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