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>>                                                      CERT-NL, 01-Mar-2000 <<
>> All CERT-NL information has been moved to http://cert.surfnet.nl.  Links  <<
>> to CERT-NL information contained in this advisory are therefore outdated. <<
>>                                                                           <<
>> CERT-NL also has stopped the CERT-CC-Mirror service.  Due to this the     <<
>> links to the CERT-CC mirror are obsolete. Visit the CERT-CC site for the  <<
>> complete CERT-CC advisory texts:                     http://www.cert.org  <<
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Security Advisory                                                       CERT-NL
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Author/Source : CERT-NL (teun nijssen)                      Index  :    S-94-04
Distribution  : World                                       Page   :          1
Classification: External                                    Version:      Final
Subject       : IBM AIX Performance Tools Vulnerabilities   Date   :  25-Feb-94
===============================================================================

CERT-NL last night received information on an IBM AIX vulnerability.
The following text is composed from advisories published by several
sister CERT teams, mainly CERT-CC's CA-94:03.
- -------------------------------------------------------------------------------

PROBLEM:   Vulnerabilities exist in IBM AIX Performance Tools.
PLATFORM:  All IBM AIX 3.2.5 and AIX 3.2.4 patched by PTF U420020 or U422510.
DAMAGE:    Unprivileged local users may gain unauthorized root access.
SOLUTION:  Apply workaround immediately (described below) until patch
           APAR IX42332 is made available.

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.

- ---------------------------------------------------------------------------
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.
- ---------------------------------------------------------------------------

- ---------------------------------------------------------------------------
If you believe that your system has been compromised, contact  CERT-NL
or your local Site Security Contact (SSC).
- ---------------------------------------------------------------------------
==============================================================================
CERT-NL is the Computer Emergency Response Team for SURFnet customers. SURFnet
is the Dutch network for educational, research and related institutes. CERT-NL
is a member of the Forum of Incident Response and Security Teams (FIRST).

All CERT-NL material is available under:
  http://cert.surfnet.nl/

In case of computer or network security problems please contact your local
CERT/security-team or CERT-NL  (if your institute is NOT a SURFnet customer
please address the appropriate (local) CERT/security-team).

CERT-NL is one/two hour(s) ahead of UTC (GMT) in winter/summer,
i.e. UTC+0100 in winter and UTC+0200 in summer (DST).

   Email:     cert-nl@surfnet.nl     ATTENDED REGULARLY ALL DAYS
   Phone:     +31 302 305 305        BUSINESS HOURS ONLY
   Fax:       +31 302 305 329        BUSINESS HOURS ONLY
   Snailmail: SURFnet bv
              Attn. CERT-NL
              P.O. Box 19035
              NL - 3501 DA  UTRECHT
              The Netherlands

NOODGEVALLEN:    06 22 92 35 64      ALTIJD BEREIKBAAR
EMERGENCIES : +31 6 22 92 35 64      ATTENDED AT ALL TIMES
CERT-NL'S EMERGENCY PHONENUMBER IS ONLY TO BE USED IN CASE OF EMERGENCIES:
THE SURFNET HELPDESK OPERATING THE EMERGENCY NUMBER HAS A *FIXED*
PROCEDURE FOR DEALING WITH YOUR ALERT AND WILL IN REGULAR CASES RELAY IT
TO CERT-NL IN AN APPROPRIATE MANNER. CERT-NL WILL THEN CONTACT YOU.
===============================================================================

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