Ipswitch IMail Web Calendaring Arbitrary File Read Vulnerability iDEFENSE Security Advisory 05.24.05 www.idefense.com/application/poi/display?id=242&type=vulnerabilities May 24, 2005 I. BACKGROUND Ipswitch Collaboration Suite (ICS) is a comprehensive communication and collaboration solution for Microsoft Windows with a customer base of over 53 million users. More information is available on the vendor's website: http://www.ipswitch.com/products/IMail_Server/index.html II. DESCRIPTION Remote exploitation of a directory traversal vulnerability in Ipswitch Inc.'s Imail Web Calendaring server allows attackers to read arbitrary files with System privileges. The problem specifically exists because of a flaw in the handling of requests for nonexistent javascript (jsp) files. By requesting a nonexistent jsp file followed by a question mark, several sequences of "..\" and then the path to a file on the system, an attacker can read arbitrary files remotely without any authentication. The following query demonstrates how the system's boot.ini file may be retrieved: GET /bla.jsp?\..\..\..\..\..\..\..\..\..\..\boot.ini HTTP/1.0 Connection: Close Host: example.com User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0) Pragma: no-cache III. ANALYSIS Successful exploitation allows remote attackers to retrieve arbitrary files from the target host. Exploitation does not require authentication and does not require exploit code, as a user can simply type the malicious query in a web browser. IV. DETECTION iDEFENSE has confirmed the existence of this vulnerability in the latest version of Ipswitch IMAIL, version 8.13. It is suspected that earlier versions are also vulnerable. V. WORKAROUND Limit access to the Web Calandaring server by allowing only trusted hosts to access TCP port 8484, the default port for Web Calandaring. If the Web Calandaring service is not required, disable it entirely. VI. VENDOR RESPONSE The vendor has released the following patch to fix this vulnerability: ftp://ftp.ipswitch.com/Ipswitch/Product_Support/IMail/imail82hf2.exe The associated vendor advisory can be found at: http://www.ipswitch.com/support/imail/releases/imail_professional/im82hf 2.html VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CAN-2005-1252 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. VIII. DISCLOSURE TIMELINE 04/25/2005 Initial vendor notification 05/10/2005 Initial vendor response 05/24/2005 Public disclosure IX. CREDIT The discoverer of this vulnerability wishes to remain anonymous. Get paid for vulnerability research http://www.idefense.com/poi/teams/vcp.jsp Free tools, research and upcoming events http://labs.idefense.com X. LEGAL NOTICES Copyright (c) 2005 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@idefense.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.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/