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TITLE:
Mono System.Web Source Code Disclosure Vulnerability

SECUNIA ADVISORY ID:
SA23432

VERIFY ADVISORY:
http://secunia.com/advisories/23432/

CRITICAL:
Moderately critical

IMPACT:
Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
Mono 1.x
http://secunia.com/product/4673/

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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