__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Citrix Access Gateway [CTX111695] November 16, 2006 18:00 GMT Number R-048 ______________________________________________________________________________ PROBLEM: A vulnerability was reported in the Citrix Access Gateway appliance. A remote user can view files on the target system. PLATFORM: Appliance versions 4.2, 4.2.1, 4.2.2 DAMAGE: When Advanced Access Control is used with an Access Gateway appliance, a remote user can gain access to data on the target Access Gateway appliance. This information could allow a remote user to compromise the target appliance. SOLUTION: Apply current patches. ______________________________________________________________________________ VULNERABILITY The risk is LOW. A remote user can obtain data from the target ASSESSMENT: appliance that may allow the remote user to compromise the appliance. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/r-048.shtml ORIGINAL BULLETIN: http://support.citrix.com/article/CTX111695 ADDITIONAL LINKS: SecurityTracker Alert ID: 1017228 http://securitytracker.com/alerts/2006/Nov/1017228.html ______________________________________________________________________________ [***** Start CTX111695 *****] Vulnerability in Access Gateway appliance may allow information disclosure Document ID: CTX111695 Created: Nov 14, 2006 Updated: Nov 14, 2006 Products: Advanced Access Control 4.2, Citrix Access Gateway 4.5 Advanced Edition Login now to access: - Developer and Learning Centers - Tools and Community uploads - Hotfix and Security Alerts - and more! Sign up, it's free! Click for a printer friendly version of this document Printer Friendly Rate this Document Rate this Document Rating: Not Rated Severity: High Description of Problem When using Advanced Access Control with an Access Gateway appliance, unauthenticated remote users may be able to gain access to data on the Access Gateway appliance. The information disclosed could potentially lead to a compromise of the appliance. This vulnerability affects the following products: • Access Gateway 4.5 Advanced Edition • Access Gateway 4.2 with Advanced Access Control 4.2 (currently known as Access Gateway 4.2 Advanced Edition) When deployed with: • Access Gateway appliance 4.2 • Access Gateway appliance 4.2.1 • Access Gateway appliance 4.2.2 Access Gateway appliances deployed without Advanced Access Control are not vulnerable to this issue. What Customers Should Do This vulnerability has been fixed in the Access Gateway appliance version 4.2.3 and later. Citrix recommends that customers upgrade their Access Gateway appliance to a fixed version which can be obtained from the following location: • V4.2.3 - http://support.citrix.com/article/CTX108902 • V4.5 - My Citrix Portal located in the Support > Downloads > Product Software section Acknowledgements Citrix thanks Thierry Zoller and Laurent Kempenaar of Telindus PSF for reporting this issue and working with us to protect customers. What Citrix Is Doing Citrix is proactively notifying customers and channel partners about this potential security issue. An article containing the information in this bulletin is available from the Citrix Knowledge Base at http://support.citrix.com/. Obtaining Support on this Issue If you require technical assistance with this issue, please contact Citrix Technical Support. Information for contacting Citrix Technical Support is available at http://support.citrix.com/. Reporting Security Vulnerabilities to Citrix Citrix welcomes input regarding the security of its products and considers any and all potential vulnerabilities very seriously. If you would like to report a security issue to Citrix, please compose an e-mail to secure@citrix.com containing the exact version of the product in which the vulnerability was found and steps to reproduce the vulnerability. [***** End CTX111695 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Security Tracker 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) R-038: HP Tru64 UNIX POSIX Threads R-039: Vulnerabilities in Client Service for NetWare R-040: Cumulative Security Update for Internet Explorer R-041: Vulnerability in Microsoft Agent R-042: Vulnerabilities in Macromedia Flash Player from Adobe R-043: Vulnerability in Workstation Service R-044: Vulnerability in Microsoft XML Core Services R-045: WinZip FileView ActiveX Control R-046: Elinks Security Update R-047: Citrix Advanced Access Control