SSRT3663 Apache HTTP Server mod_cgid, mod_alias, mod_rewrite
HPSBUX0311-301
Published: 2003-11-19 22:08:43
Updated: 2003-11-20 22:08:43

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**REVISED 01**
Source: HEWLETT-PACKARD COMPANY
SECURITY BULLETIN: HPSBUX0311-301
Originally issued: 18 November 2003
Last revised: 19 November 2003
SSRT3663 Apache HTTP Server mod_cgid, mod_alias, mod_rewrite
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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.

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PROBLEM: 1. mod_cgid mishandling of CGI redirect paths could
            result in CGI output going to the wrong client when a
            threaded MPM is used.

            More details are available at:
      http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0789

         2. A buffer overflow could occur in mod_alias and
            mod_rewrite when a regular expression with more than
            9 captures is configured.

            More details are available at:
      http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0542


IMPACT: Potential Denial of Service or execute arbitrary code.

PLATFORM: HP9000 Servers running HP-UX release B.11.00, B.11.11,
          B.11.20, 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)

          product-name, version (product-tag/bundle-tag)

          - hp apache-based web server, 2.0.43.04
            or earlier (HPApache/B9416AA)
            This product includes Apache 2.0.43.

          - hp-ux apache-based web server, v.1.0.09.01
            or earlier (hpuxwsAPACHE/hpuxwsApache)
            This product includes Apache 2.0.47.

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

          - hp-ux apache-based web server(with IPv6 support),
            v.1.0.09.01 or earlier (hpuxwsAPACHE/hpuxwsApache)
            This product includes Apache 2.0.47.

SOLUTION: For HP-UX releases B.11.00, B.11.11, B.11.20, B.11.22
          and B.11.23 download new HP Apache product from
          http://www.software.hp.com/:

          For HPApache/B9416AA, HPApache/B9416BA and
              hpuxwsAPACHE/hpuxwsApache download the following:

          - hp-ux apache-based web server (with IPv4)
            v.1.0.10.01 or later (hpuxwsAPACHE/hpuxwsApache)
            This product includes Apache 2.0.48.
      http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/
           cgi/displayProductInfo.pl?productNumber=HPUXWSSUITE

          - hp-ux apache-based web server(with IPv6 support),
            v.1.0.10.01 or later (hpuxwsAPACHE/hpuxwsApache)
            This product includes Apache 2.0.48.
      http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/
           cgi/displayProductInfo.pl?productNumber=HPUXWSSUITE


MANUAL ACTIONS: Yes - Non-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.

AVAILABILITY: Complete product bundles are available now on
               <http://www.software.hp.com/>

CHANGE SUMMARY:  Rev. 01 Corrected typo in version number
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**REVISED  01**
A. Background
   The Common Vulnerabilities and Exposures project
   <http://cve.mitre.org/> has identified potential
   vulnerabilities in the Apache HTTP Server (CAN-2003-0789, and
   CAN-2003-0542).  It affects the following HP product
   numbers/versions on HP-UX releases B.11.00, B.11.11, B.11.20,
   B.11.22, and B.11.23:

   - hp apache-based web server, 2.0.43.04 or earlier
     (HPApache/B9416AA)

   - hp-ux apache-based web server, v.1.0.09.01 or earlier
     (hpuxwsAPACHE/hpuxwsApache)

   - hp apache-based web server, 2.0.43.04 (with IPv6 support)
     or earlier (HPApache/B9416BA)

   - hp-ux apache-based web server (with IPv6 support),
     v.1.0.09.01 or earlier (hpuxwsAPACHE/hpuxwsApache)

   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.11.20
         HP-UX B.11.22
         HP-UX B.11.23
         ====================================
         HPApache.APACHE2
         hpuxwsAPACHE.APACHE2
 --->>   fix: install hp-ux apache-based web server, v.1.0.10.01
              or later.

   END AFFECTED VERSIONS

B. Recommended solution
   The Apache Software Foundation has released Apache 2.0.48 as
   the best known version that fixes the problems identified in
   the above mentioned issues.

   For customers using HPApache/B9416AA HPApache/B9416BA and
   hpuxwsAPACHE/hpuxwsApache, HP has incorporated Apache 2.0.48
   in the following product:
   - hp-ux apache-based web server v.1.0.10.01 or later
      http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
             displayProductInfo.pl?productNumber=HPUXWSSUITE


   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.1.0.09.01   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/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_apacheconf

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
   at:

      http://itrc.hp.com

   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.

   or

   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:
   http://itrc.hp.com/cki/bin/doc.pl/screen=ckiSecurityBulletin


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

   The security patch matrix is also available via anonymous
   ftp:

   ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/

   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:

      2D2A7D59
      HP Security Response Team (Security Bulletin signing only)
      <security-alert@hp.com>
      Fingerprint =
        6002 6019 BFC1 BC62 F079 862E E01F 3AFC 2D2A 7D59

   If you have problems locating the key please write to
   security-alert@hp.com.  Please note that this key is
   for signing bulletins only and is not the key returned
   by sending 'get key' to security-alert@hp.com.


D. To report new security vulnerabilities, send email to

   security-alert@hp.com

   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 security-alert@hp.com.

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(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.

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