home *** CD-ROM | disk | FTP | other *** search
- **************************************************************************
- Security Bulletin 9201 DISA Defense Communications System
- January 22,1992 Published by: DDN Security Coordination Center
- (SCC@NIC.DDN.MIL) 1-(800) 365-3642
-
- DEFENSE DATA NETWORK
- SECURITY BULLETIN
-
- The DDN SECURITY BULLETIN is distributed by the DDN SCC (Security
- Coordination Center) under DISA contract as a means of communicating
- information on network and host security exposures, fixes, & concerns
- to security & management personnel at DDN facilities. Back issues may
- be obtained via FTP (or Kermit) from NIC.DDN.MIL [192.112.36.5]
- using login="anonymous" and password="guest". The bulletin pathname is
- SCC:DDN-SECURITY-yynn (where "yy" is the year the bulletin is issued
- and "nn" is a bulletin number, e.g. SCC:DDN-SECURITY-9201).
- **************************************************************************
-
- + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
- ! !
- ! The following important advisory was issued by the Computer !
- ! Emergency Response Team (CERT) and is being relayed unedited !
- ! via the Defense Information Systems Agency's Security !
- ! Coordination Center distribution system as a means of !
- ! providing DDN subscribers with useful security information. !
- ! !
- + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
-
- ===========================================================================
- 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.sei.cmu.edu
- 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.sei.cmu.edu (192.88.209.5) system.
-
-
-
-