__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN BEA WebLogic Server and Express Certificate Spoofing Vulnerability [BEA Security Advisory: BEA04-54.00] April 30, 2004 20:00 GMT Number O-132 ______________________________________________________________________________ PROBLEM: BEA WebLogic is a server for developing e-commerce and Internet applications using Java-based enterprise applications. The vulnerability can happen when certificate chains rejected by the custom trust manager are still considered validated and could be accepted by the server. SOFTWARE: - WebLogic Server and Express v8.1, through Service Pack 2, on all platforms - WebLogic Server and Express v7.0, through Service Pack 4, on all platforms Note: This vulnerability only affects sites using custom trust managers. DAMAGE: A remote attacker could spoof a system administrator's certificate using an inbound two-way Secure Sockets Layer (SSL) request or an outbound SSL request to spoof a remote server. SOLUTION: - For v8.1, upgrade to v8.1 Service Pack 2, then install available patch. Or, install Service Pack 3. - For v7.0, upgrade to Service Pack 5. ______________________________________________________________________________ VULNERABILITY The risk is HIGH. A remote attacker could impersonate a user ASSESSMENT: (including root) or remote server. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/o-132.shtml ORIGINAL BULLETIN: http://dev2dev.bea.com/resourcelibrary/ advisoriesnotifications/BEA04_54.00.jsp ______________________________________________________________________________ [***** Start BEA Security Advisory: BEA04-54.00 *****] Security Advisory:(BEA04-54.00) From: BEA Systems Inc. Minor Subject: Patches available to prevent user impersonation. Product(s) Affected: WebLogic Server and WebLogic Express Threat level: Medium - A remote attacker, when 2-way SSL is used with a custom trust manager, might be able to exploit this vulnerability. Severity: High - A successful attacker could impersonate a system administrator or a remote server. A problem was identified that could potentially cause a security vulnerability in certain versions of WebLogic Server and WebLogic Express. Patches are available to correct this problem (see Section II). BEA System treats potential security problems with the highest degree of urgency and does everything possible to ensure the security of all customer assets. As a result, BEA systems strongly suggests the following actions: I. Read the following advisory. II. Apply the suggested action. III. If you know of any additional users interested in future security advisories, please forward them the registration instructions included in this advisory. I. Advisory This vulnerability affects sites using custom trust managers. This vulnerability can occur when WebLogic Server is validating a certificate chain. It occurs under the following circumstances: - During an inbound 2-way SSL request (when the user's certificate is validated). - During an outbound SSL request (when the remote server's certificate chain is validated). If a certificate chain is validated and accepted but the custom trust manager rejects the chain, the certificate chain may still be accepted. This circumstance allows an attacker using two-way SSL to impersonate a user. When outbound SSL is being used, an attacker can impersonate a remote server. The following versions of WebLogic Server and WebLogic Express are affected by this vulnerability - WebLogic Server and WebLogic Express 8.1 released through Service Pack 2, on all platforms - WebLogic Server and WebLogic Express 7.0 released through Service Pack 4, on all platforms II. SUGGESTED ACTION BEA strongly recommends the following course of actions: BEA strongly recommends the following course of actions. WebLogic Server and WebLogic Express version 8.1 1. Upgrade to WebLogic Server and WebLogic Express version 8.1 Service Pack 2. 2. Install the patch from: ftp://ftpna.beasys.com/pub/releases/security/CR129371_81sp2.jar WebLogic Server version 8.1 Service Pack 3 is also supported with this patch. WebLogic Server and WebLogic Express version 7.0 1. Upgrade to WebLogic Server and WebLogic Express version 7.0 Service Pack 5. BEA Systems strongly suggests that customers apply the actions recommended in all our security advisories. BEA Systems also urges customers to apply every Service Pack as they are released. Service Packs include a roll-up of all bug fixes for each version of the product, as well as each of the prior Service Packs. Service Packs and information about them can be found at: http://commerce.beasys.com/downloads/weblogic_server.jsp#wls Note: Information about securing WebLogic Server and WebLogic Express can be found at http://e-docs.bea.com/wls/docs81/security.html, Specific lockdown information is provided at http://e-docs.bea.com/wls/docs81/lockdown/index.html. We strongly encourage you to review this documentation to ensure your server deployment is securely configured. III. FUTURE SECURITY COMMUNICATIONS As a policy, if there are any security-related issues with any BEA product, BEA will distribute an advisory and instructions with the appropriate course of action. Because the security of your site, data, and code is our highest priority, we are committed to communicating all security-related issues clearly and openly. All previous advisories can be viewed at http://dev2dev.bea.com/advisories/ BEA has established an opt-in emailing list specifically targeted for product security advisories. As a policy, if a user has opted-in to our emailing list and there are any security issues with the BEA product(s) he/she is using, BEA will distribute an advisory and instructions via email with the appropriate course of action. ADDITIONAL USERS WHO WISH TO REGISTER FOR ADVISORY DISTRIBUTION SHOULD FOLLOW THE REGISTRATION DIRECTIONS AT http://dev2dev.bea.com/advisories/ IV. REPORTING SECURITY ISSUES Security issues can be reported to BEA by sending email to secalert@bea.com or by following the directions at http://dev2dev.bea.com/advisories/. All reports of security issues will be promptly reviewed and all necessary actions taken to ensure the continued security of all customer assets. If you have any questions or care to verify the authenticity of this advisory, please contact BEA Technical Support at support@bea.com Thank you, BEA Systems, Inc. [***** End BEA Security Advisory: BEA04-54.00 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of BEA Systems Inc., ISS X-Force, and US-CERT 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@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. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) O-122: Red Hat Updated OpenOffice Packages Fix Security Vulnearbility in Neon O-123: Debian 483-1 MySQL O-124: Cisco TCP Vulnerabilities in Multiple Cisco Products O-125: Cisco Vulnerabilities in SNMP Message Processing O-126: Red Hat Updated Kernel Packages Fix Several Vulnerabilities O-127: Debian linux-kernel-2.4.16 Vulnerabilities O-128: Apache HTTP Server 2.0.49 Release Fixes Security Vulnerabilities O-129: Common Desktop Environment (CDE) dtlogin XDMCP parser Vulnerability O-130: Perl and ActivePerl win32_stat Buffer Overflow O-131: AIX Symlink and Buffer Overflow Vulnerabilities in LVM Commands