Security Vulnerability in Apache Web Servers

Security Vulnerability in Apache Web Servers

Post by Security Ale » Thu, 04 Jul 2002 21:34:45



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   HEWLETT-PACKARD COMPANY SECURITY BULLETIN: #0197,
   Originally issued: 1 July 2002
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The information in the following Security Advisory 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 Advisory as
soon as possible.

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PROBLEM:  A remotely exploitable vulnerability in handling of large
          data chunks in Apache-based web servers.

PLATFORM: HP9000 Servers running HP-UX release 11.00, and 11.11
          with the HP Apache product installed.

DAMAGE:   Increased privilege, DoS or execution of arbitrary code.  

SOLUTION: For HP-UX releases 11.00 and 11.11, download new product
          bundles from the ftp site below.

MANUAL ACTIONS: Install repaired binary

AVAILABILITY: Complete product bundles are available now for 11.00
              and 11.11 are available for PA-RISC architecture
              platforms via ftp at hprc.external.hp.com  (see below
              for account details).

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A. Background
    The CERT Advisory CA-2002-17 regarding Apache affects the
    following HP product numbers:

    B9416AA Apache 2.x   PA-RISC HP-UX releases 11.00 and 11.11
    B9415AA Apache 1.3.x PA-RISC HP-UX releases 11.00 and 11.11

    HP Apache 1.3.26 (PA-RISC)
    installs into /opt/apache and /opt/tomcat
    disk space: 55-65 MB
    documents:  /opt/apache/htdocs/doc

    HP Apache 2.0.39 (PA-RISC)
    installs into /opt/hpapache2
    disk space: 80-90 MB
    documents:  /opt/hpapache2/hp_apache_docs

    HP Apache automatically starts upon installation if port 80
    is available.

    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.

    An advisory has been issued for HP Compaq systems.  Please
    refer to HP Compaq SSRT2253, which says in part:

      CSWS Secure Web Server for HP Tru64 UNIX and HP OpenVMS
      "Potential Apache Web Server Chunk Handling Vulnerability"

      Patches are available for CSWS for HP Tru64 UNIX at:
        http://tru64unix.compaq.com/internet/download.htm#sws_v591

      Patches are available for CSWS for HP OpenVMS at:
        http://www.openvms.compaq.com/openvms/products/ips/apache/
            +csws_patches.html

B. Fixing the problem
   The fixes for HP-UX 11.00 and 11.11 are in the form of new
   product bundles, instead of patches.  An ftp server account has
   been created to enable timely downloading of these binaries.

     System:    hprc.external.hp.com  (192.170.19.51)
     Login:     apache
     Password:  apache



   Retrieve the binaries and verify the correct size, cksum output
   and MD5 fingerprint.

   Version     Product    HP-UX      cksum(1) output     MD5 output
               number     Release    and byte count
   _________________________________________________________________
   Apache 2.0.39
               B9416AA   11.00 and 11.11
                                   4267700545 27197440
                                     098CFC257C9E6DF2E90176A57BB8F3A3

   Apache 1.3.26
               B9415AA   11.00 and 11.11
                                   1412216467 60262400
                                     5F2BDC824D6518E1E897753D3C43FAC6

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.

    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.

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

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

D. To report new security vulnerabilities, send email to


   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)

   Permission is granted for copying and circulating this
   Advisory to Hewlett-Packard (HP) customers (or the Internet
   community) for the purpose of alerting them to problems,
   if and only if, the Advisory is not edited or changed in
   any way, is attributed to HP, and provided such reproduction
   and/or distribution is performed for non-commercial purposes.

   Any other use of this information is prohibited. HP is not
   liable for any misuse of this information by any third party.
 ________________________________________________________________

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Yours truly,
HP S/W Security Team
WTEC Cupertino, California