CERT Advisory 076

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CERT Advisory

 · 4 years ago

  

 
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CERT Advisory CA-94:03  
Original issue date:   February 24, 1994 
Last revised: -- 
                   
Topic: IBM AIX Performance Tools Vulnerabilities 
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The CERT Coordination Center has received information concerning 
vulnerabilities in the "bosext1.extcmds.obj" Licensed Program Product 
(performance tools).  These problems exist on IBM AIX 3.2.4 systems that 
have Program Temporary Fixes (PTFs) U420020 or U422510 installed and 
on all AIX 3.2.5 systems. 

CERT recommends that affected sites apply the workaround provided in 
section III below. 

 
I.      Description 
         
        Vulnerabilities exist in the bosext1.extcmds.obj performance tools 
        in AIX 3.2.5 and in those AIX 3.2.4 systems with Program Temporary 
        Fixes (PTFs) U420020 or U422510 installed.  These problems do not 
        exist in earlier versions of AIX. 

II.     Impact 

        Local users can gain unauthorized root access to the system. 

III.    Workaround 

        A. The recommended workaround is to change the permissions of 
           all the programs in the /usr/lpp/bosperf directory structure 
           so that the setuid bit is removed and the programs can be 
           executed only by 'root'.  This can be accomplished as follows: 

                % su root 
                # chmod -R u-s,og= /usr/lpp/bosperf/* 

           The programs affected by this workaround include: 
                filemon, fileplace, genkex, genkld, genld, lvedit, 
                netpmon, rmap, rmss, stripnm, svmon, tprof  

           As a result of this workaround, these programs will no longer 
           be executable by users other than 'root'. 

        B. Patches for these problems can be ordered as Authorized 
           Program Analysis Report (APAR) IX42332. 

           To order an APAR from IBM call 1-800-237-5511 and ask for 
           shipment as soon as it is available.  APARs may be obtained 
           outside the U.S. by contacting your local IBM representative. 

           Any further information that we receive on APAR IX42332 will 
           be available by anonymous FTP in the file 
           pub/cert_advisories/CA-94:03.README on info.cert.org. 

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The CERT Coordination Center wishes to thank Jill K. Bowyer of USAF/DISA 
for reporting this problem and IBM for their prompt response to this problem. 
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If you believe that your system has been compromised, contact the CERT 
Coordination Center or your representative in Forum of Incident 
Response and Security Teams (FIRST). 

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 
on info.cert.org. 

Copyright 1994 Carnegie Mellon University 
This material may be reproduced and distributed without permission provided 
it is used for noncommercial purposes and the copyright statement is 
included. 

CERT is a service mark of Carnegie Mellon University. 

 
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