Rated as : Moderate Risk
Cybozu Products Arbitrary File Retrieval Vulnerability
by Tan Chew Keong
Release Date: 2006-08-28
Summary
A vulnerability has been found in Cybozu Products. When exploited, the
vulnerability allows
an authenticated user to retrieve arbitrary files accessible to the web
server process.
Tested Versions
* Cybuzu Office Version 6.5 (Build 1.2 20050427121735) for Windows
* Cybozu Share 360 Version 2.5 (Build 0.2 20050121115231) for Windows
Details
This advisory discloses a directory traversal vulnerability in Cybozu
products.
1) Cybozu Office File Cabinet File Download Directory Traversal
Cybuzu Office does not properly validate the "id" parameter in
"/scripts/cbag/ag.exe" before
using it to retrieve files from the file cabinet for a logon user. This
allows a malicious user
to retrieve arbitrary files accessible to the web server process using
directory traversal characters.
Example (to retrieve the password hash of the admin page):
http://192.168.1.64/scripts/cbag/ag.exe?page=FileDownload&id=../../../../../../../../../../../../../inetpub/scripts/cbag/cb5/data/admin¬imecard=1&type=text&subtype=html&ct=1
2) Cybozu Share 360 File Cabinet and Message Attachment Download Directory
Traversal
Cybuzu Share 360 does not properly validate the "id" parameter
in "/scripts/s360v2/s360.exe"
before using it to retrieve files from the file cabinet and to retrieve
file attachments from a
received message/memo. This allows a malicious user to retrieve arbitrary
files accessible to the
web server process using directory traversal characters.
Example (to retrieve the password hash of the admin page):
http://192.168.1.64/scripts/s360v2/s360.exe?page=FileDownload&id=../../../../../../../../../../inetpub/scripts/s360v2/s360v2/data/admin&type=text&subtype=plain&ct=1&.txt
http://192.168.1.64/scripts/s360v2/s360.exe?page=MessageDownload&mid=37&id=../../../../../../../../../../inetpub/scripts/s360v2/s360v2/data/admin&bc=1&type=text&subtype=plain&ct=1&.txt
Patch / Workaround
Cybuzu Office:
Update to Version 6.6 (Build 1.3).
Cybozu Share 360:
Update to Version 2.5 (Build 0.3).
References
http://cybozu.co.jp/products/dl/notice_060825/
Disclosure Timeline
2006-07-04 - Vulnerability Discovered.
2006-07-13 - Initial Vendor Notification.
2006-07-13 - Initial Vendor Reply.
2006-07-14 - Received scheduled patch release date from vendor.
2006-08-16 - Received notification that patch release will be delayed.
2006-08-25 - Vendor released patch information on website.
2006-08-28 - Public Disclosure.
Contact
For further enquries, comments, suggestions or bug reports, simply email
them to
Tan Chew Keong (chewkeong[at]vuln[dot]sg)
securitydot.net - 2006-08-28
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