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TUCoPS :: HP/UX :: n-058.txt

Vulnerabilities in Webmin Usermin (CIAC N-058)




             __________________________________________________________

                       The U.S. Department of Energy
                   Computer Incident Advisory Capability
                           ___  __ __    _     ___
                          /       |     /_\   /
                          \___  __|__  /   \  \___
             __________________________________________________________

                             INFORMATION BULLETIN

                       Vulnerabilities in Webmin/Usermin
                                [HPSBUX0303-250]

March 18, 2003 21:00 GMT                                          Number N-058
______________________________________________________________________________
PROBLEM:       miniserv.pl in (1) Webmin before 1.070 and (2) Usermin before 
               1.000 does not properly handle metacharacters such as line 
               feeds and carriage returns (CRLF) in Base-64 encoded strings 
               during Basic authentication. 
PLATFORM:      HP9000 Servers running HP-UX release 11.00, 11.11, 11.20, and 
                 11.22 
               hp apache-based web server, 1.3.27.00 or earlier 
               hp apache-based web server, 2.0.43.00 or earlier 
               hp-ux webmin-based admin, v.1.0.00.01 or earlier 
DAMAGE:        Remote attackers could potentially spoof a session ID and 
               potentially gain root privileges. 
SOLUTION:      Install product bundles or apply workarounds. 
______________________________________________________________________________
VULNERABILITY  The risk is HIGH. Remote access to the web administrator 
ASSESSMENT:    program could act as a pipeline to the server for an attacker. 
______________________________________________________________________________
LINKS: 
 CIAC BULLETIN:      http://www.ciac.org/ciac/bulletins/n-058.shtml 
______________________________________________________________________________
[***** Start HPSBUX0303-250 *****]

Document ID:  HPSBUX0303-250
Date Loaded:  20030317
      Title:  SSRT3523 Sec. Vulnerability in Webmin/Usermin


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 -----------------------------------------------------------------
Source: HEWLETT-PACKARD COMPANY
SECURITY BULLETIN: HPSBUX0303-250
Originally issued: 17 March 2003
SSRT3523 Sec. Vulnerabilities in Webmin/Usermin
 -----------------------------------------------------------------
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: Potential vulnerability regarding miniserv.pl in
           (1) Webmin before 1.070, and
           (2) Usermin before 1.000 does not properly handle
         metacharacters such as line feeds and carriage returns
         (CRLF) in Base-64 encoded strings during Basic
         authentication, which allows remote attackers to
         potentially spoof a session ID and potentially gain root
         privileges.


   Note: Usermin is currently not shipped in any of the products
         mentioned below.


   More details are available at:
   <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0101>


IMPACT:  Potential to increase privileges from remote.


PLATFORM: HP9000 Servers running HP-UX release 11.00, 11.11,
          11.20, and 11.22 with versions of the following products
          are affected, and represented as:
               product-name, version (product-tag/bundle-tag)


        - hp apache-based web server, 1.3.27.00 or earlier
          (ApacheStrong/B9415AA)
          This product includes Webmin 0.980.


        - hp apache-based web server, 2.0.43.00 or earlier
          (HPApache/B9416AA, HPApache/B9416BA)
          This product includes Webmin 0.980.


        - hp-ux webmin-based admin, v.1.0.00.01 or earlier
          (hpuxwsWEBMIN/hpuxwsWebmin)
          This product includes Webmin 1.020


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


          For ApacheStrong/B9415AA download the following:
          - hp apache-based web server, 1.3.27.01
            (ApacheStrong/B9415AA)
            This product includes Webmin 1.070.
     <http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/
         cgi/displayProductInfo.pl?productNumber=B9415AA132701>


          For HPApache/B9416AA, HPApache/B9416BA and
              hpuxwsWEBMIN/hpuxwsWebmin download the following:
          - hp-ux webmin-based admin, v.1.0.01.01 or later
            (hpuxwsWebmin/hpuxwsWebmin)
            This product includes Webmin 1.070.
     <http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/
         cgi/displayProductInfo.pl?productNumber=HPUXWSSUITE>


   NOTE: No IPv6 solution is available at this time.
         This Security Bulletin will be updated when such
         becomes available.


MANUAL ACTIONS: Yes - Update
                Install the product containing the fix.
                For customers with HPApache/B9416AA or
                HPApache/B9416BA installed, the fix requires
                migration to hpuxwsWEBMIN/hpuxwsWebmin and
                removing the affected products from the system.


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


 -----------------------------------------------------------------
A. Background
   The Common Vulnerabilities and Exposures project
   <http://cve.mitre.org/> has identified multiple potential
   vulnerabilities in the Webmin GUI Administration tool
   (CAN-2003-0101).  It affects the following HP product
   numbers/versions on HP-UX releases 11.00, 11.11, 11.20
   and 11.22::


   - hp apache-based web server, 1.3.27.00 or earlier
     (ApacheStrong/B9415AA)


   - hp apache-based web server, 2.0.43.00 or earlier
     (HPApache/B9416AA, HPApache/B9416BA)


   - hp-ux webmin-based admin, v.1.0.00.01 or earlier
     (hpuxwsWEBMIN/hpuxwsWebmin)


B. Recommended solution
   The Webmin Group has released Webmin 1.070 as the best known
   version that fixes the problems identified in the above
   mentioned issues.


   For customers using ApacheStrong/B9415AA, HP has incorporated
   Webmin 1.070 in the following products:
    - B9415AA:       hp apache-based web server 1.3.27.01
        This product includes Webmin 1.070.


   For customers using HPApache/B9416AA, HPApache/B9416BA and
   hpuxwsWEBMIN/hpuxwsWebmin, HP has incorporated Webmin 1.070
   in the following products:
    - hpuxwsWebmin:  hp-ux webmin-based admin v.1.0.01.01 or
      later;
        This product includes Webmin 1.070.


  NOTE: No IPv6 solution is available at this time.  This Security
        Bulletin will be updated when such becomes available.


   Check for Webmin Installation
   -----------------------------
   To determine if the Webmin GUI Administration Tool from HP
   is installed on your system, use Software Distributor's swlist
   command. Since Webmin is not visible at the "product" level
   for products prior to hpuxwsWEBMIN, search for Apache as well.
   All versions of products may co-exist on a single system.


   For example, the results of the commands:
   swlist -l product | grep -i webmin
     hpuxwsWEBMIN          A.1.0.00.01    HP-UX Webmin-based Admin


   swlist -l product | grep -i apache


     ApacheStrong  1.3.19.21     HP Apache-based Web Server
                                   with Strong (128bit) Encryption
     HPApache      2.0.39.01.02  HP Apache-based Web Server


   In the above examples, all of these need to be updated.


   Stop Webmin
   -----------------------------
   Before updating, make sure to stop any previous Webmin binary.
   Otherwise, the previous binary will continue running,
   preventing the new one from starting, although the installation
   would be successful.


   After determining which Webmin is installed, stop Webmin with
   the following commands:


     for ApacheStrong:   /opt/apache/webmin/webmin-init stop
     for HPApache:       /opt/hpapache2/webmin/webmin-init stop
     for hpuxwsWEBMIN:   /opt/hpws/webmin/webmin-init stop


   Since Webmin is bundled with Apache for products prior to
   hpuxwsWEBMIN, Apache also needs to be stopped.


     for ApacheStrong:    /opt/apache/bin/apachectl stop
     for HPApache:        /opt/hpapache2/bin/apachectl stop


   Download and Install Webmin/Apache
   -----------------------------
   - Download Webmin/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/B9416AA or HPApache/B9416BA
     installed, migrate to hpuxwsWEBMIN/hpuxwsWebmin 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 Webmin Installation
   ----------------------------
   If you rather remove Webmin 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:


   For ApacheStrong/B9415AA, HPApache/B9416AA, and
   HPApache/B9416BA when removing Webmin, you will also remove
   Apache.
     %ls /etc/rc.config.d | grep apache
        apacheconf
        hpapache2conf


     NOTE: For HP Apache 1.3.x, you must manually remove the
           Apache directory in addition to the Tomcat directory.
           Apache is under directory "/opt/apache" for
           HP Apache 1.3.x.


   For hpuxwsWebmin/hpuxwsWebmin:
     %ls /etc/rc.config.d | grep webmin
        hpws_webminconf



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.


 -----------------------------------------------------------------


(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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[***** End HPSBUX0303-250 *****]
_______________________________________________________________________________

CIAC wishes to acknowledge the contributions of Hewlett-Packard for the 
information contained in this bulletin.
_______________________________________________________________________________


CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy
(DOE) and the emergency backup response team for the National
Institutes of Health (NIH). CIAC is located at the Lawrence Livermore
National Laboratory in Livermore, California. CIAC is also a founding
member of FIRST, the Forum of Incident Response and Security Teams, a
global organization established to foster cooperation and coordination
among computer security teams worldwide.

CIAC services are available to DOE, DOE contractors, and the NIH. CIAC
can be contacted at:
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    STU-III:  +1 925-423-2604
    E-mail:   ciac@ciac.org

Previous CIAC notices, anti-virus software, and other information are
available from the CIAC Computer Security Archive.

   World Wide Web:      http://www.ciac.org/
   Anonymous FTP:       ftp.ciac.org

PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
communities receive CIAC bulletins.  If you are not part of these
communities, please contact your agency's response team to report
incidents. Your agency's team will coordinate with CIAC. The Forum of
Incident Response and Security Teams (FIRST) is a world-wide
organization. A list of FIRST member organizations and their
constituencies can be obtained via WWW at http://www.first.org/.

This document was prepared as an account of work sponsored by an
agency of the United States Government. Neither the United States
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employees, makes any warranty, express or implied, or assumes any
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