[ SOURCE: http://www.secureroot.com/security/advisories/9640285491.html ] -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== CERT(sm) Advisory CA-94:02 Original issue date: February 14, 1994 Last revised:September 19,1997 Attached copyright statement A complete revison history is at the end of this file. Topic: Revised Patch for SunOS /usr/etc/rpc.mountd Vulnerability - --------------------------------------------------------------------------- *** THIS IS A REVISED CERT ADVISORY *** *** IT CONTAINS NEW VULNERABILITY AND PATCH INFORMATION *** *** SUPERSEDES CERT ADVISORY CA-91:09 and CA-92:12 *** The CERT Coordination Center has received information concerning a vulnerability in /usr/etc/rpc.mountd in Sun Microsystems, Inc. SunOS 4.1.1, 4.1.2, 4.1.3, and 4.1.3c. SunOS 4.1.3.u.1, Solaris 2.x, and Solbourne's 4.1B and 4.1C are not vulnerable. Sun has produced a patch for this vulnerability for sun3 and sun4 architectures. It is available through your local Sun Answer Center as well as through anonymous FTP from the ftp.uu.net system in the /systems/sun/sun-dist directory or from the ftp.eu.net system in the /sun/fixes directory. This vulnerability is currently being exploited. Please review CERT Advisory CA-94:01 'Ongoing Network Monitoring Attacks'. - ----------------------------------------------------------------------------- I. Description If an access list of hosts within /etc/exports is a string over 256 characters or if the cached list of netgroups exceeds the cache capacity then the file system can be mounted by anyone. II. Impact Unauthorized remote hosts will be able to mount the file system. This will allow unauthorized users read and write access to files on mounted file systems. III. Solution Obtain and install the appropriate patch following the instructions included with the patch. Patches are available from ftp://ftp.uu.net/systems/sun/sun-dist/patches/ ftp://ftp.eu.net/sun/fixes/ There is a README file and directory layout to help identify which binaries are appropriate for which architectures. Patch-ID Filename BSD MD5 Checksum Checksum 100296-04 100296-04.tar.Z 15271 40 4e1354ecb7fb9c7e962d7020f31f07bf - --------------------------------------------------------------------------- If you believe that your system has been compromised, contact the CERT Coordination Center or your representative in Forum of Incident Response and Security Teams (FIRST). Internet E-mail: cert@cert.org Telephone: 412-268-7090 (24-hour hotline) CERT personnel answer 8:30 a.m.-5:00 p.m. EST(GMT-5)/EDT(GMT-4), and are on call for emergencies during other hours. CERT Coordination Center 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 info.cert.org. - ------------------------------------------------------------------------------ Copyright 1994,1995, 1996 Carnegie Mellon University. Conditions for use, disclaimers, and sponsorship information can be found in http://www.cert.org/legal_stuff.html and ftp://ftp.cert.org/pub/legal_stuff . If you do not have FTP or web access, send mail to cert@cert.org with "copyright" in the subject line. CERT is registered in the U.S. Patent and Trademark Office. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Revision history Sept. 19,1997 Attached copyrigth statement Aug. 30, 1996 Information previously in the README was inserted into the advisory. Updated URL format. June 09, 1995 Solution - recommended source to use for patches if the checksums didn't match Apr. 20, 1994 Solution - noted that Sun ensured that the same versions of patches were available at all locations and provided files to help determine which architectures require the patch. -----BEGIN PGP SIGNATURE----- Version: PGP for Personal Privacy 5.0 Charset: noconv iQA/AwUBOBS/klr9kb5qlZHQEQLF+gCg+xiA3eRLwz5DSFOUYw3lp01KzV0AoJzW Aah6tJ9WsbR6/kPUQGN8AvJY =0vnV -----END PGP SIGNATURE-----