CERT Advisory 043

eZine lover (@eZine)

Published in 

CERT Advisory

 · 4 years ago

  

 
-----BEGIN PGP SIGNED MESSAGE----- 

=========================================================================== 
CA-92:07                        CERT Advisory 
                               March 31, 1992 
                        AIX /bin/passwd Vulnerability 

- --------------------------------------------------------------------------- 

The Computer Emergency Response Team/Coordination Center (CERT/CC) has 
received information concerning a vulnerability with the passwd command 
in AIX 3.2 and the 2007 update of AIX 3.1. 

IBM is aware of this problem, and a fix is available as apar number 
"ix23505".  Patches are available for AIX 3.2 and the 2007 update of  
AIX 3.1. 

This fix may be ordered from Level 2 support or by anonymous ftp from  
software.watson.ibm.com (129.34.139.5) on the Internet. 

     1. To order from IBM call 1-800-237-5511 and ask  
        that the fix be shipped.  Patches may be obtained 
        outside the U.S. by contacting your local IBM 
        representative. 

     2. If you are on the Internet, use anonymous ftp to obtain  
        the fix from software.watson.ibm.com. 

        Patch           Filename                Checksum 
        AIX 3.2         pub/aix3/pas.32.tar.Z   54431  2262 
        AIX 3.1 2007    pub/aix3/pas.31.tar.Z   06703    99 

        Patches should be retrieved using binary mode. 

 
IBM is currently incorporating the fix into the 3.2 version and 3.1 
updates of AIX.  Future shipments of these products should not be  
vulnerable to this problem.  If you have any questions about products  
you receive, please contact your IBM representative. 
- --------------------------------------------------------------------------- 

I.   Description 

     The passwd command contains a security vulnerability. 

II.  Impact 

     Local users can gain unauthorized root access. 

III. Solution 

     A.  As root, disable /bin/passwd until you obtain and install  
         the patch. 

                # chmod 0500 /bin/passwd 

     B.  Obtain the fix from IBM and install according to the 
         directions provided with the patch. 

- --------------------------------------------------------------------------- 
The CERT/CC would like to thank Paul Selick of the University of Toronto 
for bringing this security vulnerability to our attention.  We would also  
like to thank IBM for their quick response to this problem, and for making  
the patches available via anonymous ftp. 
- --------------------------------------------------------------------------- 

If you believe that your system has been compromised, contact CERT/CC 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/CC personnel answer 7:30 a.m.-6:00 p.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, information about FIRST representatives, and other 
information related to computer security are available for anonymous ftp 
from cert.org (192.88.209.5). 

 
-----BEGIN PGP SIGNATURE----- 
Version: 2.6.2 

iQCVAwUBMaMw73VP+x0t4w7BAQFUdAP7BR5tDeOaYBC/YxUTCoKIkd/VTgfD/3KG 
Tx+9vGzBRF2hmvXfaRZNPU+hBy0ev6AjoHCEtvRyebmFe3JcAciRzttPMm0xvPxl 
RmNt47D/VFsQxq/9GZIGxuNDUzACJ+6vayhFOU7aAvwgyuJIt7lSa05La1fDHFpD 
lFP3g/nbrlA= 
=Rh+E 
-----END PGP SIGNATURE-----