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- ***********************************************************************
- DDN Security Bulletin 9117 DCA DDN Defense Communications System
- 18 Sep 91 Published by: DDN Security Coordination Center
- (SCC@NIC.DDN.MIL) (800) 235-3155
-
- DEFENSE DATA NETWORK
- SECURITY BULLETIN
-
- The DDN SECURITY BULLETIN is distributed by the DDN SCC (Security
- Coordination Center) under DCA contract as a means of communicating
- information on network and host security exposures, fixes, & concerns
- to security & management personnel at DDN facilities. Back issues may
- be obtained via FTP (or Kermit) from NIC.DDN.MIL [192.67.67.20]
- using login="anonymous" and password="guest". The bulletin pathname is
- SCC:DDN-SECURITY-yynn (where "yy" is the year the bulletin is issued
- and "nn" is a bulletin number, e.g. SCC:DDN-SECURITY-9001).
- **********************************************************************
-
- SunOS SPARC Integer Division Vulnerability
-
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- ! !
- ! The following important advisory was issued by the Computer !
- ! Emergency Response Team (CERT) and is being relayed unedited !
- ! via the Defense Communications Agency's Security Coordination !
- ! Center distribution system as a means of providing DDN !
- ! subscribers with useful security information. !
- ! !
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-
-
-
- CA-91:16 CERT Advisory
- September 18, 1991
- SunOS SPARC Integer Division Vulnerability
-
- ---------------------------------------------------------------------------
-
- The Computer Emergency Response Team/Coordination Center (CERT/CC) has
- received information concerning a vulnerability in Sun Microsystems,
- Inc. (Sun) integer division on their SPARC architecture. This vulner-
- ability exists on all SPARC platforms (including sun4 and sun4c)
- for SunOS versions 4.1 and 4.1.1.
-
- Sun has provided patches for this vulnerability. They are available through
- your local Sun Answer Centers worldwide as well as through anonymous
- ftp from the ftp.uu.net system (in the sun-dist directory).
-
- Fix Patch ID Filename Checksum
- /sys/sun{4,4c}/OBJ/crt.o 100376-01 100376-01.tar.Z 09989 11
-
- Please note that Sun Microsystems sometimes updates patch files. If
- you find that the checksum is different please contact Sun Microsystems
- or us for verification.
- ---------------------------------------------------------------------------
-
- I. Description
-
- A security vulnerability exists in the integer division
- on the SPARC architecture that can be used to gain root
- privileges.
-
- II. Impact
-
- Any user logged into the system can gain root access.
-
- III. Solution
-
- Replace /sys/sun{4,4c}/OBJ/crt.o and rebuild the kernel(s)
- necessary for your host configuration(s). Reboot each host
- using the appropriate kernel.
-
- Please refer to the System and Network Administration
- Manual for instructions on building and configuring a
- new custom kernel.
-
- ---------------------------------------------------------------------------
- The CERT/CC wishes to thank Gordon Irlam of the Department of Computer,
- University of Adelaide, Australia, for bringing this vulnerability to
- our attention and for his further assistance with the solution. We
- also wish to thank Sun Microsystems for their prompt response to this
- vulnerability.
- ---------------------------------------------------------------------------
-
- If you believe that your system has been compromised, contact CERT/CC via
- telephone or e-mail.
-
- Computer Emergency Response Team/Coordination Center (CERT/CC)
- Software Engineering Institute
- Carnegie Mellon University
- Pittsburgh, PA 15213-3890
-
- Internet E-mail: cert@cert.sei.cmu.edu
- Telephone: 412-268-7090 24-hour hotline:
- CERT/CC personnel answer 7:30a.m.-6:00p.m. EDT,
- on call for emergencies during other hours.
-
- Past advisories and other computer security related information are available
- for anonymous ftp from the cert.sei.cmu.edu (192.88.209.5) system.
-
-
-