SSRT4853 rev. 0 HP-UX Apache with PHP remote Denial of Service, ...

From: Security Alert (secure_at_cup.hp.com)
Date: 10/28/04

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    Date: Thu, 28 Oct 2004 11:19:10 GMT

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    HP SECURITY BULLETIN

    HPSBUX01090 REVISION: 0

    SSRT4853 rev. 0 HP-UX Apache with PHP remote Denial of Service,
                    local elevation of privileges, unauthorized access
                    to restricted resources

    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 October 2004

    POTENTIAL SECURITY IMPACT:
    Remote denial of service, local elevation of privilege,
    unauthorized access to restricted resources.

    SOURCE:
    HEWLETT-PACKARD COMPANY
    HP Software Security Response Team

    REFERENCES:
    CAN-2004-0786, CAN-2004-0747, CAN-2004-0751, CAN-2004-0748,
    CAN-2004-0809, CAN-2004-0811

    VULNERABILITY SUMMARY:
    Several potential security vulnerabilities have been identified in
    Apache Web Server and PHP running on HP-UX where a remote
    user may be able to cause a Denial of Service (DoS), obtain
    local elevataton of privileges or gain unauthorized access to
    restricted resources.

    1. The IPv6 URI parsing routines in the apr-util library for
        Apache 2.0.50 and earlier allow remote attackers to cause
        a denial of service (child process crash) via a certain URI,
        as demonstrated using the Codenomicon HTTP Test Tool.
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0786

    2. Buffer overflow in Apache 2.0.50 and earlier allows local
        users to gain apache privileges via a .htaccess file that
        causes the overflow during expansion of environment
        variables.
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0747

    3. The char_buffer_read function in the mod_ssl module for
        Apache 2.x, when using reverse proxying to an SSL server,
        allows remote attackers to cause a denial of service
        (segmentation fault).
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0751

    4. mod_ssl in Apache 2.0.50 and earlier allows remote
        attackers to cause a denial of service (CPU consumption)
        by aborting an SSL connection in a way that causes an
        Apache child process to enter an infinite loop
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0748

    5. The mod_dav module in Apache 2.0.50 and earlier allows
        remote attackers to cause a denial of service (child process
        crash) via a certain sequence of LOCK requests for a
        location that allows WebDAV authoring access.
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0809

    6. Vulnerability in Apache 2.0.51 prevents the merging of the
        Satisfy directive, which could allow attackers to obtain
        access to restricted resources contrary to the specified
        authentication configuration.
    http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0811

    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
    currently suppported versions of hpuxwsAPACHE HP-UX
    Apache-based Web Server.

    BACKGROUND:
         AFFECTED VERSIONS

         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
          =============
          hpuxwsAPACHE
          action: install revision A.2.0.52.00 or subsequent

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

          For IPv6:
          HP-UX B.11.11
          =============
          hpuxwsAPACHE,revision=B.1.0.00.01
          hpuxwsAPACHE,revision=B.1.0.07.01
          hpuxwsAPACHE,revision=B.1.0.08.01
          hpuxwsAPACHE,revision=B.1.0.09.01
          hpuxwsAPACHE,revision=B.1.0.10.01
          hpuxwsAPACHE,revision=B.2.0.48.00
          hpuxwsAPACHE,revision=B.2.0.49.00
          hpuxwsAPACHE,revision=B.2.0.50.00
          action: install revision B.2.0.52.00 or subsequent

          HP-UX B.11.23
          =============
          hpuxwsAPACHE
          action: install revision B.2.0.52.00 or subsequent

         END AFFECTED VERSIONS

    RESOLUTION:
    NOTE: Support ended for HP-UX Web Server Suite for HP-UX 11i
                 v1.6 (B.11.22) after March 31, 2004. HP-UX Web
                 Server Suite for HP-UX 11i v1.6 (B.11.22) is no
                 longer available or supported.

                 Users of this software are encouraged to update to
                 HP-UX 11i v2 (B.11.23) and install the latest HP-UX
                 Web Server Suite for HP-UX 11i v2.
                 Please write to security-alert@hp.com for more
                 information.

    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 B.2.0.49.00 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:
      < http://software.hp.com>

    - - 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

    hpapache2conf

    hpws_apache[32]conf

    MANUAL ACTIONS: Yes - Update plus other actions
                     Install the product containing the fix.

    BULLETIN REVISION HISTORY:
    Revision 0 - 26 October 2004

       Initial release

    * 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__driverITRC&topiccode=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*:
    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."

    (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
    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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    --
Yours truly,
HP S/W Security Team
WTEC Cupertino, California
Return-Path: secure@cup.hp.com
Reply-to: security-alert@hp.com
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