__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN RealVNC Authentication Bypass [ISS Protection Alert: 222] May 26, 2006 18:00 GMT Number Q-210 [REVISED 22 Jun 2006] [REVISED 11 Oct 2006] ______________________________________________________________________________ PROBLEM: RealVNC Free Edition, Personal Edition, and Enterprise Edition could allow a remote attacker to bypass authentication and gain unauthorized access to the system. PLATFORM: RealVNC Ltd.: RealVNC Enterprise Edition 4.0 to 4.2.2 RealVNC Ltd.: RealVNC Free Edition 4.0 to 4.1.1 RealVNC Ltd.: RealVNC Personal Edition 4.0 to 4.2.2 DAMAGE: Could allow a remote attacker to bypass authentication and gain unauthorized access to the system. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. Could allow a remote attacker to bypass ASSESSMENT: authentication and gain unauthorized access to the system. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/q-210.shtml ORIGINAL BULLETIN: http://xforce.iss.net/xforce/alerts/id/222 ADDITIONAL LINKS: Cisco Document ID: 70509 http://www.cisco.com/en/US/products/hw/voiceapp/ps967/tsd_products_security_response09186a00806c4c31.html ______________________________________________________________________________ REVISION HISTORY: 06/22/2006 - note that Cisco has made available an update which will update RealVNC to version 4.1.2 and later 10/11/2006 - note that Cisco Document ID: 70509 has added information on IPVC 3540/DCS Visit ISS X-Force web site for their publication of this information: http://xforce.iss.net/xforce/alerts/id/222 _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of ISS 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) Q-200: Sun N1 Vulnerability Q-201: awstats Q-202: Microsoft Word Vulnerability Q-203: MySQL Q-204: Linux Kernel Vulnerabilties Q-205: HP Tru64 UNIX Q-206: kernel Update Q-207: postgresql Update Q-208: php Update Q-209: Windows VPN Client