CERT Advisory 037

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CERT Advisory

 · 4 years ago

  

 
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CA-92:01                        CERT Advisory 
                              January 20, 1992 
                     NeXTstep Configuration Vulnerability 

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The Computer Emergency Response Team/Coordination Center (CERT/CC)   
has received information concerning a vulnerability in release 2 of 
NeXTstep's NetInfo default configuration.  This vulnerability will 
be corrected in future versions of NeXTstep. 

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I.   Description 

     By default, a NetInfo server process will provide information to 
     any machine that requests it. 

 
II.  Impact 

     Remote users can gain unauthorized access to the network's 
     administrative information such as the passwd file. 

 
III. Solution 

     Ensure that the trusted_networks property of each NetInfo domain's 
     root NetInfo directory is set correctly, so that only those systems 
     which should be obtaining information from NetInfo are granted 
     access. The value for the trusted_networks property should be the 
     network numbers of the networks the server should trust. 

     Note that improperly setting trusted_networks can render your 
     network unusable. 

     Consult Chapter 16, "Security", of the "NeXT Network and System 
     Administration" manual for release 2 for details on setting the 
     trusted_networks property of the root NetInfo directory. 

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The CERT/CC wishes to thank NeXT Computer, Inc. for their cooperation in 
documenting and publicizing this security vulnerability. 
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If you believe that your system has been compromised, contact CERT/CC via 
telephone or e-mail. 

Internet E-mail: cert@cert.org 
Telephone: 412-268-7090 (24-hour hotline) 
           CERT/CC personnel answer 7:30a.m.-6:00p.m. EST(GMT-5)/EDT(GMT-4), 
           on call for emergencies during other hours. 

Computer Emergency Response Team/Coordination Center (CERT/CC) 
Software Engineering Institute 
Carnegie Mellon University 
Pittsburgh, PA 15213-3890 

Past advisories and other information related to computer security are 
available for anonymous ftp from the cert.org (192.88.209.5) system. 

 
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