From ciac@rumpole.llnl.gov Thu Mar 30 04:34:17 2000 From: CIAC Mail User Resent-From: mea culpa To: ciac-bulletin@rumpole.llnl.gov Resent-To: jericho@attrition.org Date: Wed, 29 Mar 2000 09:09:54 -0800 (PST) Subject: CIAC Bulletin K-028: FreeBSD Port Exploits for mh/nmh, Lynx, and mtr [ For Public Release ] -----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN FreeBSD Port Exploits for mh/nmh, Lynx, and mtr March 28, 2000 17:00 GMT Number K-028 ______________________________________________________________________________ PROBLEM: Buffer overflow vulnerabilities have been identified in mh/nmh/exmh/exmh2 and Lynx ports. A local root exploit has been identified in mtr. PLATFORM: All systems that are running FreeBSD port collections that predate the correction dates given in the vendor bulletins: mh/nmh/exmh/exmh2 -- SA-00:07 (Revised 2000-03-19) Lynx -- SA-00:08 (Announced 2000-03-15) mtr -- SA-00:09 (Announced 2000-03-15) DAMAGE: mh/nmh/exmh/exmh2 -- An attacker can send a hostile MIME attachment which can execute arbitrary code if the recipient opens the attachment. Lynx -- There are numerous potential and several proven security vulnerabilities (publicized on the BugTraq mailing list) that are exploitable by a malicious server. mtr -- It is possible that a local user can obtain root privileges. SOLUTION: mh/nmh/exmh/exmh2 -- Remove all old versions and install the updated ports as indicated in the bulletin. Lynx -- Remove all old versions and use other text-mode WWW browsers. mtr -- Either remove all old versions, disable the setuid bit, or upgrade the ports collection and rebuild the mtr port. ______________________________________________________________________________ VULNERABILITY mn/nmh/exmh/exmh2 -- Risk is low. The attacker must send a ASSESSMENT: specially-crafted email attachment, and the recipient must open the attachment. Lynx -- Risk is medium. There are several publicized security vulnerabilities. mtr -- Risk is low. Only local users can take advantage of the exploit. ______________________________________________________________________________ http://www.ciac.org/ciac/bulletins/k-028.shtml ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of FreeBSD, Inc. for the information contained in this bulletin. ______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. 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Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) K-018: HP-UX - Security Vulnerability with PMTU Strategy K-019: Microsoft - "Spoofed LPC Port Request" Vulnerability K-020: Majordomo open() call Vulnerability K-021: Malicious HTML Tags Vulnerability K-022: FreeBSD - Asmon/Ascpu Vulnerability K-023: FreeBSD - Delegate Proxy Server Vulnerability K-024: Microsoft Systems Management Server Vulnerability K-025: MySQL Password Authentication Vulnerability K-026: Microsoft SQL Server Admin Login Encryption Vulnerability K-027: Microsoft SQL Server and MSDE Malicious Query Vulnerability -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBOOELqbnzJzdsy3QZAQEgUQQA0xe2F3Ct2qYJ5jnAPlcg5rWMfYCsCucX 7kvjeCktNkEgJg/4fZsFc+GtBSW9GHMnb7sXxX2tPTgjkLLMcJ5BbqoTs+TGKPaV 2vw0HsGFSN5RB/JyY0FXxdeWK4sifdQxrDF+CojJAEP7joFC8km4wJSWywvVTuXo P0rmV9OCZVs= =RA7h -----END PGP SIGNATURE-----