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Message-ID: <FB24803D1DF2A34FA59FC157B77C9705028DD191__30285.4705405936$1085895011@idserv04.idef.com> Date: Thu, 27 May 2004 12:37:51 -0400 From: idlabs-advisories@...fense.com To: <idlabs-advisories@...fense.com> Subject: [Full-Disclosure] iDEFENSE Security Advisory 05.27.04: 3Com OfficeConnect Remote 812 ADSL Router Authentication Bypass Vulnerability 3Com OfficeConnect Remote 812 ADSL Router Authentication Bypass Vulnerability iDEFENSE Security Advisory 05.27.04 www.idefense.com/application/poi/display?id=106&type=vulnerabilities May 27, 2004 I. BACKGROUND The 3Com OfficeConnect Remote 812 ADSL Router is a standalone bridge/router, with interfaces to a Local Area Network and an ADSL interface to a Wide Area Network. II. DESCRIPTION Remote exploitation of an authentication bypass vulnerability in 3Com's OfficeConnect Remote 812 ADSL Router could allow remote users to arbitrarily manipulate network traffic. By making multiple successive authorization attempts to connect to the router, it is eventually possible to authenticate with any username/password combination. While the root cause of the vulnerability is not known, exploitation is trivial and does not require either a known username or password. III. ANALYSIS Successful exploitation allows an attacker to perform any administrative function that a legitimate administrator could perform. More information about the 3Com OfficeConnect Remote 812 ADSL Router is available at http://www.3com.com/products/en_US/detail.jsp?tab=support&pathtype=suppo rt&sku=3CP4144. IV. DETECTION iDEFENSE has confirmed that the 3Com OfficeConnect Remote 812 ADSL Router with the last firmware patch is vulnerable V. WORKAROUNDS A previously given workaround for other issues with the HTTP interface is available at the link shown. This shows how to configure the router to prevent external access to the HTTP port. http://support.3com.com/infodeli/tools/remote/ocradsl/http_filtering.pdf VI. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CAN-2004-0477 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. VII. DISCLOSURE TIMELINE 02/18/04 Exploit acquired by iDEFENSE 03/08/04 iDEFENSE Clients notified 03/11/04 Initial vendor notification - no response 03/30/04 Secondary vendor notification - no response 05/27/04 Public Disclosure VIII. CREDIT Rafel Ivgi is credited with this discovery. Get paid for vulnerability research http://www.idefense.com/poi/teams/vcp.jsp IX. LEGAL NOTICES Copyright (c) 2004 iDEFENSE, Inc. Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDEFENSE. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please email customerservice@...fense.com for permission. Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information. _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
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