__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Center ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Sun in.ftpd Filename Expansion Vulnerability [Sun Microsystems Security Bulletin #00205] August 6, 2001 17:00 GMT Number L-129 ______________________________________________________________________________ PROBLEM: The expansion of short-hand filename notation can lead to buffer overflows. PLATFORM: SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6, 5.6_x86, 5.5.1, 5.5.1_x86, 5.5, 5.5_x86 DAMAGE: The buffer overflow can allow an intruder to execute arbitrary code. SOLUTION: Apply the patches as prescribed below by Sun. ______________________________________________________________________________ VULNERABILITY The risk is HIGH. The vulnerability can be exploited remotely ASSESSMENT: and has been discussed in detail in public forums. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/l-129.shtml ______________________________________________________________________________ [***** Start Sun Microsystems Security Bulletin #00205 *****] ________________________________________________________________________________ Sun Microsystems, Inc. Security Bulletin Bulletin Number: #00205 Date: August 2, 2001 Cross-Ref: CERT Advisory CA-2001-07 Title: in.ftpd ________________________________________________________________________________ The information contained in this Security Bulletin is provided "AS IS." Sun makes no warranties of any kind whatsoever with respect to the information contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED AND EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW. IN NO EVENT WILL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARDLESS OF ANY THEORY OF LIABILITY ARISING OUT OF THE USE OF OR INABILITY TO USE THE INFORMATION CONTAINED IN THIS SECURITY BULLETIN, EVEN IF SUN MICROSYSTEMS, INC. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. If any of the above provisions are held to be in violation of applicable law, void, or unenforceable in any jurisdiction, then such provisions are waived to the extent necessary for this disclaimer to be otherwise enforceable in such jurisdiction. ________________________________________________________________________________ 1. Bulletins Topics Sun announces the release of patches for Solaris(tm) 8, 7, 2.6, 2.5.1, and 2.5 (SunOS(tm) 5.8, 5.7, 5.6, 5.5.1, and 5.5) which relate to an in.ftpd vulnerability reported in CERT CA-2001-07. Sun recommends that you install the patches listed in section 4 immediately on systems running SunOS 5.8, 5.7, 5.6, 5.5.1, and 5.5 which use in.ftpd. 2. Who is Affected Vulnerable: SunOS 5.8, 5.8_x86, 5.7, 5.7_x86, 5.6, 5.6_x86, 5.5.1, 5.5.1_x86, 5.5, 5.5_x86 3. Understanding the Vulnerability The in.ftpd daemon is the Internet File Transfer Protocol (FTP) server process. The FTP server process interprets file names according to the "globbing" conventions used by sh(1). CERT Advisory CA-2001-07 describes a vulnerability in some of the "globbing" routines which incorrectly manage buffers and may allow remote users to execute arbitrary code on the FTP server. The issue was discovered by COVERT Labs at PGP Security who describe their findings at: http://www.pgp.com/research/covert/advisories/048.asp CERT Advisory CA-2001-07 is available from: http://www.cert.org/advisories/CA-2001-07.html 4. List of Patches The following patches are available in relation to the above problems. OS Version Patch ID __________ _________ SunOS 5.8 111606-01 SunOS 5.8_x86 111607-01 SunOS 5.7 110646-02 SunOS 5.7_x86 110647-02 SunOS 5.6 106301-03 SunOS 5.6_x86 106302-03 SunOS 5.5.1 103603-16 SunOS 5.5.1_x86 103604-16 SunOS 5.5 103577-12 SunOS 5.5_x86 103578-12 _______________________________________________________________________________ APPENDICES A. Patches listed in this bulletin are available to all Sun customers at: http://sunsolve.sun.com/securitypatch B. Checksums for the patches listed in this bulletin are available at: ftp://sunsolve.sun.com/pub/patches/CHECKSUMS C. Sun security bulletins are available at: http://sunsolve.sun.com/security D. Sun Security Coordination Team's PGP key is available at: http://sunsolve.sun.com/pgpkey.txt E. To report or inquire about a security problem with Sun software, contact one or more of the following: - Your local Sun answer centers - Your representative computer security response team, such as CERT - Sun Security Coordination Team. Send email to: security-alert@sun.com F. 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To subscribe, supply the following in the subject line (not body): subscribe cws your-email-address Note that your-email-address should be substituted by your email address. unsubscribe Sender is removed from the CWS mailing list. ________________________________________________________________________________ Copyright 2000 Sun Microsystems, Inc. All rights reserved. Sun, Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries. This Security Bulletin may be reproduced and distributed, provided that this Security Bulletin is not modified in any way and is attributed to Sun Microsystems, Inc. and provided that such reproduction and distribution is performed for non-commercial purposes. [***** End Sun Microsystems Security Bulletin #00205 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Sun Microsystems for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Center, 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 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. 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. 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