__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Sun Java Web Server Vulnerability January 30, 2001 19:00 GMT Number L-033 ______________________________________________________________________________ PROBLEM: It is possible to use the administration module to invoke servlets on a Java Web Server. A vulnerability within the administration module could allow execution of commands against the web server by a malicious attacker. PLATFORM: All versions of Sun Java Web Server. DAMAGE: With carefully crafted JSP tags a malicious attacker could successfully execute commands on the Java Web Server. SOLUTION: For Java Web Server 1.1.1 or 1.1.2, first upgrade the Java Web Server and then install the appropriate patch. For other versions of Java Web Server, apply the appropriate vendor patch as described in this bulletin. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. The details for exploiting this ASSESSMENT: vulnerability have been publicly discussed. ______________________________________________________________________________ [****** Start Sun Microsystems Advisory ******] -----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ Sun Microsystems, Inc. Security Bulletin Bulletin Number: #00197 Date: August 23, 2000 Cross-Ref: Foundstone Advisory FS-082200-11-JWS Title: Java Web Server ______________________________________________________________________________ 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 Java Web Server 2.0 and 1.1.3 which relate to a vulnerability with the administration module. Sun recommends that you install the patches listed in section 4 immediately on systems running Java Web Server. 2. Who is Affected Vulnerable: All versions of Java Web Server 3. Understanding the Vulnerability It is possible to use the administration module to invoke servlets on a Java Web Server. With carefully crafted JSP tags it is possible to execute arbitrary commands on the Web Server. 4. List of Patches The following patches are available in relation to the above problem. For Java Web Server 1.1.1 or 1.1.2, first upgrade the Java Web Server and then install the appropriate patch. Java Web Server Version Patch ID _______________________ ________ 1.1.3 Patch 3 2.0 Patch 3 Patches are available at: http://java.sun.com/products/java-server/jws113patch3.html http://java.sun.com/products/java-server/jws20patch3.html ______________________________________________________________________________ Sun acknowledges, with thanks, Foundstone, Inc. for bringing this vulnerability to our attention. ______________________________________________________________________________ APPENDICES A. Sun security bulletins are available at: http://sunsolve.sun.com/security B. Sun Security Coordination Team's PGP key is available at: http://sunsolve.sun.com/pgpkey.txt C. 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 D. To receive information or subscribe to our CWS (Customer Warning System) mailing list, send email to: security-alert@sun.com with a subject line (not body) containing one of the following commands: Command Information Returned/Action Taken _______ _________________________________ help An explanation of how to get information key Sun Security Coordination Team's PGP key list A list of current security topics query [topic] The email is treated as an inquiry and is forwarded to the Security Coordination Team report [topic] The email is treated as a security report and is forwarded to the Security Coordination Team. Please encrypt sensitive mail using Sun Security Coordination Team's PGP key send topic A short status summary or bulletin. For example, to retrieve a Security Bulletin #00138, supply the following in the subject line (not body): send #138 subscribe Sender is added to our mailing list. 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. -----BEGIN PGP SIGNATURE----- Version: PGP 6.5.2 iQCVAwUBOaPzlLdzzzOFBFjJAQHfUAQAlPyRCi9LhB0ty/iBjzb3L7ytbqwuxLl/ mvH1reDFl6AaJoeNOntm9PpJlUvOjM//S3PPgpBTtDwdzZr6NYphSEOpO9h3XWla lIiMJTQK4UZChqbzrCwkZFn1/JD1Wnqug6iUU3ZHxk+Ko3zKjvRkglJAMPzwsUab QK6r3DKQ1Ow= =EHY9 -----END PGP SIGNATURE----- [****** End Sun Microsystems Advisory ******] ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Sun Microsystems 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 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@llnl.gov 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) 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. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) L-023: Microsoft "Incomplete TCP/IP Packet" Vulnerability L-024: Microsoft Texas Imperial Software WFTP3.0 Pro Vulnerability L-025: LPRng Format String Vulnerability L-026: Microsoft Windows NT "Registry Permissions" Vulnerability L-027: Win2000 "snmp" Vulnerability L-028: Solaris arp(setgid) Vulnerability L-029: FreeBSD "ipfw/ip6fw" Vulnerability L-030: Four Vulnerabilities in ISC BIND L-031: Sun Answerbook2 Vulnerability L-032: Class Loading Vulnerability in Sun Java (TM) Runtime Environment