=========================================================================== CA-92:06 CERT Advisory March 19, 1992 AIX uucp Vulnerability --------------------------------------------------------------------------- The Computer Emergency Response Team/Coordination Center (CERT/CC) has received information concerning a vulnerability with the UUCP software in versions of AIX up to 2007. The vulnerability does not exist in AIX 3.2. IBM is aware of this problem, and a fix is available as apar number "ix18516". This patch is available for all AIX releases from GOLD to 2006. The fix is in the 2007 update and 3.2 release of AIX. IBM customers may call IBM Support (800-237-5511) and ask that the fix be shipped to them. Patches may be obtained outside the U.S. by contacting your local IBM representative. --------------------------------------------------------------------------- I. Description Previous versions, except AIX 3.2, of the UUCP software contained incorrectly configured versions of various files. II. Impact Local users can execute unauthorized commands and gain unauthorized root access. III. Solution - If allowing users access to the uucp isn't necessary, disable it. % chmod 0100 /usr/bin/uucp - Obtain the fix from IBM Support. - Install the fix following the instructions in the README file. --------------------------------------------------------------------------- The CERT/CC would like to thank Steve Knodle, Clarkson University, for bringing this security vulnerability to our attention. --------------------------------------------------------------------------- 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.sei.cmu.edu 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.sei.cmu.edu (192.88.209.5).