[原文]Directory traversal vulnerability in the Web Calendaring server in Ipswitch Imail 8.13, and other versions before IMail Server 8.2 Hotfix 2, allows remote attackers to read arbitrary files via "..\" (dot dot backslash) sequences in the query string argument in a GET request to a non-existent .jsp file.
iDEFENSE Security Advisory 05.24.05-4 - Remote exploitation of a directory traversal vulnerability in Ipswitch Inc.'s Imail Web Calendaring server allows attackers to read arbitrary files with System privileges. Version 8.13 is confirmed vulnerable. Earlier versions may be susceptible as well.
Ipswitch IMail Web Calendaring Arbitrary File Read Vulnerability
iDEFENSE Security Advisory 05.24.05
May 24, 2005
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
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
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
GET /bla.jsp?\..\..\..\..\..\..\..\..\..\..\boot.ini HTTP/1.0
User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)
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.
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.
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:
The associated vendor advisory can be found at:
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
VIII. DISCLOSURE TIMELINE
04/25/2005 Initial vendor notification
05/10/2005 Initial vendor response
05/24/2005 Public disclosure
The discoverer of this vulnerability wishes to remain anonymous.
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X. LEGAL NOTICES
Copyright (c) 2005 iDEFENSE, Inc.
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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
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Ipswitch IMail Web Calendaring Server GET Request Traversal Arbitrary File Access
Remote / Network Access
Loss of Confidentiality
Upgrade to version 8.2 Hotfix 2 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.