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- ===========================================================================
- 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).
-
-