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             AUSCERT External Security Bulletin Redistribution

 ESB-2002.524 -- HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0209-218
             Security Vulnerability in DNS for HP Peripherals
                             20 September 2002

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                HP LaserJet Printers
                        HP Jetdirect Print Servers
Vendor:                 Hewlett-Packard
Impact:                 Execute Arbitrary Code/Commands
                        Denial of Service
Access Required:        Remote

Ref:                    ESB-2002.468

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Document ID:  HPSBUX0209-218
Date Loaded:  20020917
      Title:  Security Vulnerability in DNS for HP Peripherals

 -----------------------------------------------------------------
 HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0209-218
 Originally issued: 18 Sep 2002
 SSRT2345 Security Vulnerability in DNS Resolvers
          for HP Peripherals
 -----------------------------------------------------------------

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: Multiple potential vulnerabilities in DNS Resolver
         Libraries

PLATFORM: HP Jetdirect Print Servers, HP LaserJet Printers

IMPACT: Potential denial of service, potential unauthorized access

 ------------------------------------------------------------------ 
SOLUTION: Until a firmware update is available, eliminate the DNS
          server's IP address or use specific IP addresses rather
          than DNS names. 

MANUAL ACTIONS: Yes - NonUpgrade 
                Change the DNS configuration as documented below.

AVAILABILITY: This bulletin will be revised when a firmware update
              is available.
 ------------------------------------------------------------------ 
 A. Background

    CERT (Computer Emergency Response Team) has recently posted
    an alert regarding DNS Resolver vulnerabilities in many network
    devices that implement a DNS Resolver.

       http://www.cert.org/advisories/CA-2002-19.html
 
    The following HP Jetdirect devices are vulnerable:
    --------------------------------------------------
 
      Upgradable Print Servers

        615n J6057A EIO 10/100 Print Server
        610n J4169A EIO 10/100 Print Server
        610n J4167A EIO 802.5 Print Server
        680n J6058A EIO 802.11b Print Server
        380x J6061A External 802.11b Print Server
        310x J6038A External 10/100 Print Server
        250m J6042A LIO 10/100 Print Server

      Non-Upgradable Print Servers

	175x J6035A External 10/100 Print Server
	200m J6039A LIO 10/100 Print Server

  The following HP Peripherals are vulnerable:
  --------------------------------------------

   HP Color LaserJet 4550
   HP Color LaserJet 4600
   HP LaserJet 4100, 4100MFP
   HP LaserJet 9000, 9000MFP
   HP Digital Sender 9100C

   
 B. Recommended solution

    For HP Jetdirect Print Servers (Upgradable)

    1) Using a browser, access the Jetdirect's web server.  
    2) Click the "Networking" tab, then click "Other Settings".
    3) If a DNS Server has been specified, clear out the 
         IP address and then click "Apply".
    4) This bulletin will be updated when a firmware update
       is available.

    For HP Jetdirect Print servers (Not Upgradable)

    1) If connected to a scanner, a scan-to-email function is 
       available.  The email address of the SMTP server should 
       be entered as an IP address rather than a DNS name. 

     	a) To modify the email address of the SMTP server access
           Jetdirect's web server.
	b) Click the "Networking" tab, then click "Other Settings".
	c) The Email Server can be specified as an IP Address.
	   Then click "Apply".

    2) If scan-to-email is not being used, the DNS resolver
       is not being used.  However, the steps above can be
       implemented in anticipation of adding a scanner.

 
    HP Peripherals

    NOTE: The HP Peripherals listed implement a separate resolver
    from Jetdirect.  

    These peripherals are not upgradable.  Please utilize IP 
    addresses rather than DNS names for any email notifications
    or other functionality that would require a DNS resolver. 

    To learn more about securing Jetdirect Print Servers on
    the network please refer to this document:

      http://www.hp.com/cposupport/networking/support_doc/
      bpj05999.html#P26_2431

 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://ftp.itrc.hp.com/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

    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.

    Permission is granted for copying and circulating this
    Bulletin to Hewlett-Packard (HP) customers (or the Internet
    community) for the purpose of alerting them to problems,
    if and only if, the Bulletin 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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