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TITLE:
pppBLOG "files[0]" Parameter Disclosure of Sensitive Information

SECUNIA ADVISORY ID:
SA20375

VERIFY ADVISORY:
http://secunia.com/advisories/20375/

CRITICAL:
Moderately critical

IMPACT:
Exposure of sensitive information

WHERE:
>From remote

SOFTWARE:
pppBLOG 0.x
http://secunia.com/product/10268/

DESCRIPTION:
rgod has discovered a vulnerability in pppBLOG, which can be
exploited by malicious people to disclose sensitive information.

Input passed to the "files[0]" parameter in randompic.php isn't
properly verified, before it is used in a "readfile()" call. This can
be exploited to disclose the content of arbitrary files via directory
traversal attacks.

Successful exploitation requires that "register_globals" is enabled.

The vulnerability has been confirmed in version 0.3.8. Other versions
may also be affected.

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

Set "register_globals" to "Off".

PROVIDED AND/OR DISCOVERED BY:
rgod

ORIGINAL ADVISORY:
http://retrogod.altervista.org/pppblog_038_xpl.html

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