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- CA-92:01 CERT Advisory
- January 20, 1992
- NeXTstep Configuration Vulnerability
-
- - ---------------------------------------------------------------------------
-
- 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.
-
- - ---------------------------------------------------------------------------
-
- 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.
-
- - ---------------------------------------------------------------------------
- The CERT/CC wishes to thank NeXT Computer, Inc. for their cooperation in
- documenting and publicizing this security vulnerability.
- - ---------------------------------------------------------------------------
-
- 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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