CERT Advisory 065

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CERT Advisory

 · 4 years ago

  

 
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CA-93:12                        CERT Advisory 
                              September 16, 1993 
                        Novell LOGIN.EXE Vulnerability 

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The CERT Coordination Center has received information concerning a security 
vulnerability in Novell's NetWare 4.x login program (LOGIN.EXE). This 
vulnerability affects NetWare 4.0 and 4.01. It does not affect NetWare 2.x, 
NetWare 3.x, or Netware for UNIX. 

Novell is making available a security enhancement to the login program for 
NetWare 4.x. CERT strongly recommends that sites using of Novell NetWare 4.X 
replace their current LOGIN.EXE program on all affected systems with this 
security-enhanced version as soon as possible. 

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I.   Description: 

     A security vulnerability exists in LOGIN.EXE in Novell NetWare 4.X. 
     In some environments, a user's name and password may be temporarily  
     written to disk. 

II.  Impact: 

     User accounts may be readily compromised. 

III. Solution: 
     
     NetWare 4.x sites should obtain and install on all affected systems  
     the security-enhanced LOGIN.EXE program. CERT strongly recommends that  
     sites replace their current LOGIN.EXE with the security-enhanced version  
     as soon as possible.   

     This new file is available via anonymous FTP from first.org. The files  
     are located in: 

     Filename                        Size     Checksum 
     --------                        ------   ----------------------------- 
     /pub/software/seclog.exe        166276   00193 163 (Standard UNIX Sum) 
                                              58886 325 (System V Sum) 

     This file is also available at no charge through NetWare resellers,  
     on NetWire in library 14 of the NOVLIB forum, or by calling  
     +1-800-NETWARE.  NetWare customers outside the U.S. may call  
     Novell at +1-303-339-7027 or +31-55-384279 or may fax a request for  
     SECLOG.EXE v4.02 to Novell at +1-303-330-7655 or +31-55-434455. Fax  
     requests should include company name, contact name, postal address,  
     and phone number. 

     The distribution SECLOG.EXE is a self-extracting archive that   
     contains a patched file and a text file of installation instructions.  
     The patch file (LOGIN.EXE) and the text file (SECLOG.TXT) are created  
     by executing the distribution file SECLOG.EXE. After extracting the  
     files, the dir command should produce the following output: 

         SECLOG   EXE  166276    xx-xx-xx   xx:xxx 
         LOGIN    EXE  354859    08-25-93   11:43a 
         SECLOG   TXT    5299    09-02-93   11:16a 

     Note that the date and time shown for SECLOG.EXE will reflect when  
     this file was created on your system. 

     To install the patch, follow the directions contained in the text file 
     SECLOG.TXT. 

     After installing the patch, sites should instruct all users to change  
     their passwords. 

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The CERT Coordination Center would like to thank Karyn Pichnarczyk and 
the contribution of CIAC to this advisory. We would also like to 
acknowledge Richard Colby of Chem Nuclear Geotech, Inc., for reporting 
this vulnerability to CIAC, and Novell for their efforts in the 
resolution of this vulnerability. 
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If you believe that your system has been compromised, contact the CERT 
Coordination Center or your representative in FIRST (Forum of Incident 
Response and Security Teams). 

Internet E-mail: cert@cert.org 
Telephone: 412-268-7090 (24-hour hotline) 
           CERT personnel answer 8:30 a.m.-5:00 p.m. EST(GMT-5)/EDT(GMT-4), 
           and are on call for emergencies during other hours. 

CERT Coordination Center 
Software Engineering Institute 
Carnegie Mellon University 
Pittsburgh, PA 15213-3890 

Past advisories, information about FIRST representatives, and other 
information related to computer security are available for anonymous FTP 
from cert.org (192.88.209.5). 

 
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