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Mono System.Web Source Code Disclosure Vulnerability
Secunia Advisory: SA23432
Release Date: 2006-12-21
Popularity: 6,217 views

Critical:
Moderately critical
Impact: Exposure of sensitive information
Where: From remote
Solution Status: Vendor Workaround

Software:Mono 1.x

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CVE reference:CVE-2006-6104


Description:
José Ramón Palanco has reported a vulnerability in Mono, which can be exploited by malicious people to disclose potentially sensitive information.

The vulnerability is caused due to an error in the System.Web class when handling HTTP requests. This can be exploited to gain remote access to the source code of a web application by e.g. appending "%20" to an URI.

Note: Reportedly, this can also be exploited to gain access to the Web.Config file, which may contain sensitive information like credentials.

Solution:
Fixed in subversion revision 68776.

Provided and/or discovered by:
José Ramón Palanco

Original Advisory:
http://eazel.es/advisory007-mono-xsp-source-disclosure-vulnerability.html


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