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Message-ID: <1326586554.7887.512.camel@new-desktop>
Date: Sun, 15 Jan 2012 01:15:54 +0100
From: Nicolas Grégoire <nicolas.gregoire@...rri.fr>
To: oss-security@...ts.openwall.com
Subject: Re: CVE affected for PHP 5.3.9 ?
> Right but the script has to have the line
> <sax:output href="0wn3d.php" method="text">
Wrong.
The PHP code only has to call transformToXML() after having loaded the
malicious XSLT code via importStylesheet(). The XML data itself is
irrelevant for this bug and the "sax:output" tag isn't in the PHP script
but in the XSLT stylesheet provided by the attacker.
# LOAD XML FILE
$XML = new DOMDocument();
$XML->loadXML( $sXml );
# LOAD XSLT FILE
$XSL = new DOMDocument();
$XSL->loadXML( $sXsl ); // Content of $xXsl may be untrusted !
# START XSLT
$xslt = new XSLTProcessor();
$xslt->importStylesheet( $XSL );
# TRASNFORM & PRINT
print $xslt->transformToXML( $XML ); // File creation !
Nicolas
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