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Internet Info CD-ROM (Walnut Creek) (March 1994).iso
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ddn-security-9002
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DDN Security Bulletin 90-02 DCA DDN Defense Communications System
30 Jan 90 Published by: DDN Security Coordination Center
(SCC@NIC.DDN.MIL) (800) 235-3155
DEFENSE DATA NETWORK
SECURITY BULLETIN
The DDN SECURITY BULLETIN is distributed by the DDN SCC (Security
Coordination Center) under DCA 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 [26.0.0.73 or
10.0.0.51] using login="anonymous" and password="guest". The bulletin
pathname is SCC:DDN-SECURITY-yy-nn (where "yy" is the year the bulletin
is issued and "nn" is a bulletin number, e.g. SCC:DDN-SECURITY-90-01).
**********************************************************************
SUN SENDMAIL VULNERABILITY
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
! !
! The following important advisory was issued by the Computer !
! Emergency Response Team (CERT) and is being relayed unedited !
! via the Defense Communications Agency's Security Coordination !
! Center distribution system as a means of providing DDN !
! subscribers with useful security information. !
! !
+ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - +
CERT Advisory
29 January 1990
Sun Sendmail Vulnerability
The Computer Emergency Response Team Coordination Center (CERT/CC) has
learned of, and has verified, break-ins on several Internet systems
in which the intruders have exploited a vulnerability in the Sun
sendmail program. This vulnerability exists in all versions of
SunOS up to and including the current version, 4.0.3 on Sun 3, Sun 4,
and Sun 386i systems (note that 4.0.2 is the most current version of
SunOS on the 386i machines). That is, all current Sun systems.
The vulnerability has previously been reported to Sun and a solution
to this problem (Sun bug # 1028173) is available via a new version of
sendmail supplied by Sun. The new sendmail is available directly from
the Sun Answer Center (1-800-USA-4SUN). Sun 3 and Sun 4 sendmail
binaries are also available via anonymous FTP from uunet.uu.net in the
/sun-fixes directory.
This incident underscores the need for system administrators to
maintain an awareness of the steps their vendors are taking to
improve the security aspects of their products, and to seriously
consider upgrading system configurations when solutions to security
problems are made available.
Administrators of Sun systems are urged to contact Sun for the new
version of the sendmail program. Administrators of machines other
than Suns are urged to contact their vendors to verify that they are
running the latest version of sendmail, since there may have been
security related fixes to it in the past year.
If you need further information on this problem, contact your Sun
representative or CERT/CC. CERT/CC can be contacted by telephone at
(412) 268-7090 (24 hours) or email to cert@cert.sei.cmu.edu (monitored
daily).
Our thanks to Matt Bishop and Wayne Cripps for their efforts in
analyzing and investigating this problem and its solution.
Kenneth R. van Wyk
Technical Coordinator, Computer Emergency Response Team
Software Engineering Institute
Carnegie Mellon University
cert@CERT.SEI.CMU.EDU
(412) 268-7090 (24 hour hotline)