__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN OPeNDAP Vulnerability [US-CERT Vulnerability Note VU#659148] May 21, 2007 19:00 GMT Number R-244 ______________________________________________________________________________ PROBLEM: The BES daemon in OPeNDAP server version 4 contains a vulnerability which may allow an attacker to execute arbitrary commands or upload files to a remote server. PLATFORM: BES 3.4.9 DAMAGE: May allow an attacker to execute arbitrary commands or upload files to a remote server. SOLUTION: Upgrade to the appropriate version. This upgrade also fixes a filesystem enumeration vulnerability, (REF: US-CERT VU#671028). ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. May allow an attacker to execute arbitrary ASSESSMENT: commands or upload files to a remote server. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/r-244.shtml ORIGINAL BULLETIN: http://www.kb.cert.org/vuls/id/659148 ADDITIONAL LINK: http://www.kb.cert.org/vuls/id/671028 CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= ______________________________________________________________________________ [***** Start US-CERT Vulnerability Note VU#659148 *****] Vulnerability Note VU#659148 OPeNDAP arbitrary command execution vulnerability Overview The BES daemon in OPeNDAP server version 4 contains a vulnerability. This vulnerability may allow an attacker to execute arbitrary commands, or upload files to a remote server. I. Description OPeNDAP is a software package designed to help researchers exchange data sets that are stored in different formats. The most recent version of OPeNDAP is server 4, or Hyrax. The Hyrax server includes a daemon called BES. From the BES download page: BES is a new, high-performance back-end server software framework that allows data providers more flexibility in providing end users views of their data. The current OPeNDAP data objects (DAS, DDS, and DataDDS) are still supported, but now data providers can add new data views, provide new functionality, and new features to their end users through the BES modular design. Providers can add new data handlers, new data objects/views, the ability to define views with constraints and aggregation, the ability to add reporting mechanisms, initialization hooks, and more. The BES server improperly sanitizes data supplied in compressed files. An attacker may be able to exploit this vulnerability by sending a specially crafted compressed file to a vulnerable server. II. Impact An attacker to execute arbitrary commands on a vulnerable server. III. Solution Upgrade BES 3.5.0 has been released to address this issue. Administrators are encouraged to upgrade as soon as possible. Restrict access Limiting network access to the BES daemon may prevent a remote attacker from exploiting this vulnerability. See BES installation guide for more details. Systems Affected Vendor Status Date Updated OPeNDAP, Inc. Vulnerable 18-May-2007 References http://www.opendap.org/download/BES.html http://www.opendap.org/security.html http://docs.opendap.org/index.php/Hyrax_1.2:_BES_Installation#Install http://secunia.com/advisories/25319/ Credit Thanks to NCIRT labs for reporting this vulnerability. This document was written by Ryan Giobbi. Other Information Date Public 05/14/2007 Date First Published 05/18/2007 03:10:42 PM Date Last Updated 05/21/2007 CERT Advisory CVE Name Metric 2.42 Document Revision 16 [***** End US-CERT Vulnerability Note VU#659148 *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of 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. 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