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Secunia Research: Dwarf HTTP Server Source Disclosure and Cross-Site Scripting

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                     Secunia Research 13/03/2006

   - Dwarf HTTP Server Source Disclosure and Cross-Site Scripting -

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Table of Contents

Affected Software....................................................1
Severity.............................................................2
Description of Vulnerability.........................................3
Solution.............................................................4
Time Table...........................................................5
Credits..............................................................6
References...........................................................7
About Secunia........................................................8
Verification.........................................................9

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1) Affected Software 

* Dwarf HTTP Server version 1.3.2.

Prior versions may also be affected.

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2) Severity 

Rating: Moderately Critical
Impact: Exposure of sensitive information
        Cross-site scripting
Where:  Remote

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3) Description of Vulnerability

Secunia Research has discovered two vulnerabilities in Dwarf HTTP
Server, which can be exploited by malicious people to disclose
potentially sensitive information and to conduct cross-site scripting
attacks.

1) The vulnerability is caused due to a validation error of the
filename extension supplied by the user in the URL. This can be
exploited to retrieve the source code of JSP files from the server
via specially crafted requests containing dot, space, slash and NULL
characters.

2) Input passed to the URL is not sansitised before being return to
the user in an error message. This can be exploited to execute
arbitrary HTML and script code in a user's browser session in context
of an affected site.

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4) Solution 

Update to version 1.3.3. 

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5) Time Table 

17/02/2006 - Initial vendor notification.
22/02/2006 - Initial vendor reply.
13/03/2006 - Public disclosure.

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6) Credits 

Discovered by Tan Chew Keong, Secunia Research.

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7) References

The Common Vulnerabilities and Exposures (CVE) project has assigned
CVE-2006-0819 and CVE-2006-0820 for the vulnerabilities.

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8) About Secunia 

Secunia collects, validates, assesses, and writes advisories regarding 
all the latest software vulnerabilities disclosed to the public. These 
advisories are gathered in a publicly available database at the 
Secunia website: 

http://secunia.com/

Secunia offers services to our customers enabling them to receive all 
relevant vulnerability information to their specific system 
configuration. 

Secunia offers a FREE mailing list called Secunia Security Advisories: 

http://secunia.com/secunia_security_advisories/

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9) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2006-13/advisory/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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