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| A vulnerability exists with Novell's GroupWise server which allows for the arbitrary viewing of files anywhere on the system. This includes files outside of the web root, but on the same volume as the web server. |
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Credit:
The information has been provided by Mike Shema of Foundstone, Inc.
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The Novell GroupWise server has a web-based front-end for users to access e-mail and other functions of the server. The default login page is accessed by the URL:
/servlet/webacc
The webacc usually accesses templates from the "/" directory; however, the servlet will follow directory path traversal. It is possible to view the full path of the server install by passing an invalid argument to the User.html variable:
/servlet/webacc?User.html=noexist
Which will display the full path of the GroupWise installation.
Arbitrary files can be read by the webacc servlet by passing the appropriate file name and appending a null character to the string:
/servlet/webacc?User.html=../../../../../../../../boot.ini%00
Administrators should note that the Groupwise configuration files can be viewed with this exploit. Care should be taken to limit the amount of sensitive data within these files.
Proof of concept:
From a browser, make the following URL request:
http://server:port/servlet/webacc?User.html=../../../../../../../../boot.ini%00
Solution:
Please contact the vendor for a solution. Customers should obtain upgraded software by contacting their customer support representative to obtain patches.
The severity of this vulnerability and vulnerabilities of a similar nature can be significantly reduced by installing the GroupWise server (or other application) files on a disk volume separate from the windows system root.
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