AUSCERT External Security Bulletin Redistribution

 SSRT3622 (rev. 2) Potential Security Vulnerabilities in Apache HTTP Server
                              09 January 2004


        AusCERT Security Bulletin Summary

Product:                Apache
Publisher:              Hewlett-Packard
Operating System:       HP-UX 11.23
                        HP-UX 11.22
                        HP-UX 11.20
                        HP-UX 11.11
                        HP-UX 11.04
                        HP-UX 11.00
Platform:               HP9000
Impact:                 Execute Arbitrary Code/Commands
                        Denial of Service
                        Access Confidential Data
Access Required:        Remote
CVE Names:              CAN-2003-0543, CAN-2003-0544, CAN-2003-0545

Ref:                    AL-2003.18

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Hash: SHA1

**REVISED 02**
Originally issued: 01 Oct 2003
Last Revised: 07 Jan 2004
SSRT3622 (rev. 2) Potential 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 ASN.1 encodings that are rejected as invalid
            by the parser can trigger a bug in the deallocation
            of the corresponding data structure, corrupting the
            stack.  This can be used as a denial of service
            attack.  It is currently unknown whether this can be
            exploited to run malicious code. This issue does not
            affect OpenSSL 0.9.6.

            More details are available at:

         2. Unusual ASN.1 tag values can cause an out of bounds
            read under certain circumstances, resulting in a
            denial of service vulnerability.
            More details are available at:

         3. A malformed public key in a certificate will crash
            the verify code if it is set to ignore public key
            decoding errors.  Exploitation of an affected
            application would result in a denial of service

         4. Due to an error in the SSL/TLS protocol handling,
            a server will parse a client certificate when one is
            not specifically requested.

**REVISED 02**
IMPACT:   Potential Denial of Service, remote execution of
 --->     arbitrary code and disclosure of sensitive information.

**REVISED 02**
PLATFORM: HP9000 Servers running HP-UX release B.11.00, B.11.04,
 --->     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)

          - hp apache-based web server, or earlier
            This product includes OpenSSL 0.9.6b.

          - hp-ux apache-based web server, v. or earlier
            This product includes OpenSSL 0.9.6i.

          - 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. or earlier (hpuxwsAPACHE/hpuxwsApache)
            This product includes OpenSSL 0.9.6i.

**REVISED 02**
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://software.hp.com>.

 --->     For HP-UX release B.11.04, download new patches for
 --->     systems with Virtualvault A.04.50, A.04.60, or A.04.70
 --->     installed.

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

          - hp-ux apache-based web server (with IPv4)
            A. or later (hpuxwsAPACHE/hpuxwsApache)
            This product includes OpenSSL 0.9.7b + patches.

          - hp-ux apache-based web server(with IPv6 support),
            B. or later (hpuxwsAPACHE/hpuxwsApache)
            This product includes OpenSSL 0.9.7b + patches.

 --->  Virtualvault 4.5:
 --->    PHSS_29892 s700_800 11.04 Virtualvault 4.5 IWS update
 --->    PHSS_29690 s700_800 11.04 Virtualvault 4.5 OWS update

 --->  Virtualvault 4.6:
 --->    PHSS_29893 s700_800 11.04 Virtualvault 4.6 IWS update
 --->    PHSS_29691 s700_800 11.04 Virtualvault 4.6 OWS update
 --->    PHSS_29891 s700_800 11.04 Virtualvault 4.6 TGP update

 --->  Virtualvault 4.7:
 --->    PHSS_30055 s700_800 11.04 Virtualvault 4.7 IWS update
 --->    PHSS_30056 s700_800 11.04 Virtualvault 4.7 OWS update
 --->    PHSS_30057 s700_800 11.04 Virtualvault 4.7 TGP update

 --->  Webproxy 2.0:
 --->    PHSS_29894 s700_800 11.04 Webproxy server 2.0 update
 --->  Webproxy 2.1:
 --->    PHSS_30058 s700_800 11.04 Webproxy server 2.1 update

**REVISED 02**
                Install the product containing the fix.
        For customers with HPApache/B9416AA HPApache/B9416BA
        installed, the fix requires removing the affected
        products from the system and migration to

 NOTE:  For customers with VirtualVault installations there
 --->   are NO manual actions needed, aside from installing
 --->   the patches.

**REVISED 02**
AVAILABILITY: Complete product bundles are available from
              <http://software.hp.com> for non-VirtualVault
 --->         For VirtualVault installations, retrieve patches
 --->         from <itrc.hp.com>.

**REVISED 02**
CHANGE SUMMARY:  Rev.01 temporary ftp site removed
 --->            Rev.02 HP-UX B.11.04 (VVOS) patches added.

**REVISED 02**
A. Background
   An SSL/TLS testing suite developed by the NISCC (National
   Infrastructure Security Co-Ordination Centre in the UK) has
   identified ASN.1 parsing vulnerabilities in OpenSSL.

   The Common Vulnerabilities and Exposures project
   <http://cve.mitre.org/> has identified potential
   vulnerabilities in the Apache HTTP Server (CAN-2003-0543,


 ---> The following is a list by HP-UX revision 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.

      For IPv4:
      HP-UX B.11.00
      HP-UX B.11.11
      HP-UX B.11.22
      fix: revision A. or subsequent

 ---> HP-UX B.11.04 VirtualVault 4.5
 ---> ==============================
 ---> VaultWS.WS-CORE
 ---> VaultTS.VV-IWS
 ---> VaultTS.VV-CORE-CMN
 ---> fix: install PHSS_29892, PHSS_29690 or subsequent

 ---> HP-UX B.11.04 VirtualVault 4.6
 ---> ==============================
 ---> VaultWS.WS-CORE
 ---> VaultTS.VV-IWS
 ---> VaultTS.VV-CORE-CMN
 ---> fix: install PHSS_29893, PHSS_29691, PHSS_29891
 --->      or subsequent.

 ---> HP-UX B.11.04 Virtualvault 4.7
 ---> ==============================
 ---> fix: install PHSS_30055, PHSS_30056, PHSS_30057
 --->      or subsequent.

 ---> HP-UX B.11.04 Webproxy 2.0
 ---> ==========================
 ---> HP_Webproxy.HPWEB-PX-CORE
 ---> fix: install PHSS_29894 or subsequent

 ---> HP-UX B.11.04 Webproxy 2.1
 ---> ==========================
 ---> HP_Webproxy.HPWEB-PX-CORE
 ---> fix: install  PHSS_30058 or subsequent

      For IPv6:
      HP-UX B.11.11
      HP-UX B.11.23
      fix: revision B. or subsequent


 ---> NOTE: HP-UX B.11.04 does not support IPv6.

 ---> Additional references for vulnerabilities:

 ---> * CERT/CC Vulnerability Note VU#935264 -
 --->   <http://www.kb.cert.org/vuls/id/935264>
 ---> * CERT/CC Vulnerability Note VU#255484 -
 --->   <http://www.kb.cert.org/vuls/id/255484>
 ---> * CERT/CC Vulnerability Note VU#380864 -
 --->   <http://www.kb.cert.org/vuls/id/255484>
 ---> * CERT/CC Vulnerability Note VU#686224 -
 --->   <http://www.kb.cert.org/vuls/id/686224>
 ---> * CERT/CC Vulnerability Note VU#732952 -
 --->   <http://www.kb.cert.org/vuls/id/732952>
 ---> * CERT/CC Vulnerability Note VU#104280 -
 --->   <http://www.kb.cert.org/vuls/id/104280>
 ---> * OpenSSL Security Advisory [30 September 2003] -
 --->   <http://www.openssl.org/news/secadv_20030930.txt>

**REVISED 02**
B. Recommended solution
   For customers using HPApache/B9416BA and hpuxwsAPACHE/
   hpuxwsApache, HP has incorporated OpenSSL 0.9.7b + patches
   in the following product:

   - hp-ux apache-based web server version or later

    To fix the problem:

    1. Determine the affected version.

   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     might show:

     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 <http://software.hp.com> (see above).
    - 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

 ---> For customers with HP-UX release B.11.04 (VVOS), stop Apache
 ---> (as above), and install the patches that upgrade the OpenSSL
 ---> versions to 0.9.7c.  These fixes are available in the
 ---> following patches:

 --->  Virtualvault 4.5:
 --->     PHSS_29892 B.11.04 Virtualvault 4.5 IWS update
 --->     PHSS_29690 B.11.04 Virtualvault 4.5 OWS update
 --->  Virtualvault 4.6:
 --->     PHSS_29893 B.11.04 Virtualvault 4.6 IWS update
 --->     PHSS_29691 B.11.04 Virtualvault 4.6 OWS update
 --->     PHSS_29891 B.11.04 Virtualvault 4.6 TGP update
 --->  Virtualvault 4.7:
 --->     PHSS_30055 B.11.04 Virtualvault 4.7 IWS update
 --->     PHSS_30056 B.11.04 Virtualvault 4.7 OWS update
 --->     PHSS_30057 B.11.04 Virtualvault 4.7 TGP update
 --->  Webproxy 2.0:
 --->     PHSS_29894 B.11.04 Webproxy server 2.0 update
 --->  Webproxy 2.1
 --->     PHSS_30058 B.11.04 Webproxy server 2.1 update

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   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

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D. To report new security vulnerabilities, send email to


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(c)Copyright 2003-2004 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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