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TITLE:
FD Script "fname" Arbitrary File Download Vulnerability

SECUNIA ADVISORY ID:
SA23947

VERIFY ADVISORY:
http://secunia.com/advisories/23947/

CRITICAL:
Moderately critical

IMPACT:
Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
FD Script 1.x
http://secunia.com/product/13370/

DESCRIPTION:
ajann has discovered a vulnerability in FD Script, which can be
exploited by malicious people to gain knowledge of sensitive
information.

The vulnerability is caused due to an input validation error in
download.php when processing arguments passed to the "fname"
parameter. This can be exploited to download files that are
configured as non-downloadable (e.g. .PHP, .HTM, .HTML, etc...)
within the FD Script directory and subdirectories by prepending the
target file name with "./".

The vulnerability is confirmed in version 1.3.2. Other versions may
also be affected.

SOLUTION:
Edit the source code to ensure that input is properly validated.

Do not put sensitive files or scripts in the FdScript directory or
subdirectories.

PROVIDED AND/OR DISCOVERED BY:
ajann

ORIGINAL ADVISORY:
http://archives.neohapsis.com/archives/bugtraq/2007-01/0615.html

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