From ciac@rumpole.llnl.gov Thu Sep 16 12:40:14 1999 From: CIAC Mail User Resent-From: mea culpa To: ciac-bulletin@rumpole.llnl.gov Resent-To: jericho@attrition.org Date: Wed, 15 Sep 1999 11:33:14 -0700 (PDT) Subject: CIAC Bulletin J-068: FreeBSD Vulnerabilities in wu-ftpd and proftpd [ For Public Release ] -----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN FreeBSD Vulnerabilities in wu-ftpd and proftpd September 8, 1999 17:00 GMT Number J-068 _____________________________________________________________________________ PROBLEM: A vulnerability has been identified in both wu-ftpd and proftpd. PLATFORM: All systems running FreeBSD 3.2 (and earlier) or FreeBSD-Current before 1999/08/30. DAMAGE: A remote attacker can gain root access. SOLUTION: Disable the ftp daemon until you can upgrade your wu-ftpd or proftpd port. _____________________________________________________________________________ VULNERABILITY The risk is HIGH. Buffer overflow attacks are common and easy ASSESSMENT: to execute. _____________________________________________________________________________ [ Start FreeBSD Advisory ] ============================================================================= FreeBSD-SA-99:03 Security Advisory FreeBSD, Inc. Topic: Two ftp daemons in ports vulnerable to attack. Category: ports Module: wu-ftpd and proftpd Announced: 1999-09-05 Affects: FreeBSD 3.2 (and earlier) FreeBSD-current before the correction date. Corrected: FreeBSD-3.3 RELEASE FreeBSD-current as of 1999/08/30 FreeBSD only: NO Patches: NONE I. Background wuftpd and proftpd have a flaw which can lead to a remote root compromise. They are both vulnerable since they are both based on a code base that is vulnerable. II. Problem Description Remote users can gain root via a buffer overflow. III. Impact Remote users can gain root. IV. Workaround Disable the ftp daemon until you can upgrade your system. V. Solution Upgrade your wu-ftpd or proftpd ports to the most recent versions (any version after August 30, 1999 is not impacted by this problem). If you are running non-port versions, you should verify that your version is not vulnerable or upgrade to using the ports version of these programs. ============================================================================= FreeBSD, Inc. Web Site: http://www.freebsd.org/ Confidential contacts: security-officer@freebsd.org Security notifications: security-notifications@freebsd.org Security public discussion: freebsd-security@freebsd.org PGP Key: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/public_key.asc Notice: Any patches in this document may not apply cleanly due to modifications caused by digital signature or mailer software. Please reference the URL listed at the top of this document for original copies of all patches if necessary. ============================================================================= [ End FreeBSD Advisory ] _____________________________________________________________________________ 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. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@llnl.gov For emergencies and off-hour assistance, DOE, DOE contractor sites, and the NIH may contact CIAC 24-hours a day. During off hours (5PM - 8AM PST), use one of the following methods to contact CIAC: 1. Call the CIAC voice number 925-422-8193 and leave a message, or 2. Call 888-449-8369 to send a Sky Page to the CIAC duty person or 3. Send e-mail to 4498369@skytel.com, or 4. Call 800-201-9288 for the CIAC Project Leader. Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ (or http://ciac.llnl.gov -- they're the same machine) Anonymous FTP: ftp.ciac.org (or ciac.llnl.gov -- they're the same machine) Modem access: +1 (925) 423-4753 (28.8K baud) +1 (925) 423-3331 (28.8K baud) CIAC has several self-subscribing mailing lists for electronic publications: 1. CIAC-BULLETIN for Advisories, highest priority - time critical information and Bulletins, important computer security information; 2. SPI-ANNOUNCE for official news about Security Profile Inspector (SPI) software updates, new features, distribution and availability; 3. SPI-NOTES, for discussion of problems and solutions regarding the use of SPI products. Our mailing lists are managed by a public domain software package called Majordomo, which ignores E-mail header subject lines. 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Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. 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) J-058: Microsoft "Malformed HTTP Request Header" Vulnerability J-059: IBM AIX (pdnsd) Buffer Overflow Vulnerability J-060: Microsoft Office "ODBC" Vulnerabilities J-061: Lotus Notes Domino Server Denial of Service Attacks J-062: Netscape Enterprise and FastTrack Web Servers Buffer Overflow J-063: Domain Name System (DNS) Denial of Service (DoS) Attacks J-064: ActiveX Controls, Scriptlet.typlib & Eyedog, Vulnerabilities J-065: Wu-ftpd Vulnerability J-066: FreeBSD File Flags and Man-In-The-Middle Attack J-067: Profiling Across FreeBSD Exec Calls -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBN9aaZbnzJzdsy3QZAQHhFAP9H7q6eUKJpEZnHXpwbgMo2Qdv52x3S/Xe IH7du7H7IoDk9m8+G/3fkrndM+XrWSBnKeYN7rqlSF7A1nHmLmNXuEVsvTXNJJl7 /FPLy0Si3UMHfgax86djtkgSLVC1z+lKN+OM+D6FqlNCgQ0dsN0JEzy0jSyypVm0 xuPLS0U9gns= =F4JG -----END PGP SIGNATURE-----