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<title>[29404] trunk/src/wp-includes/class-IXR.php: Ignore entities in XML-RPC requests.</title>
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<dt>Revision</dt> <dd><a href="http://core.trac.wordpress.org/changeset/29404">29404</a></dd>
<dt>Author</dt> <dd>nacin</dd>
<dt>Date</dt> <dd>2014-08-06 17:37:22 +0000 (Wed, 06 Aug 2014)</dd>
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<h3>Log Message</h3>
<pre>Ignore entities in XML-RPC requests.
props mdawaffe, nacin.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesclassIXRphp">trunk/src/wp-includes/class-IXR.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunksrcwpincludesclassIXRphp"></a>
<div class="modfile"><h4>Modified: trunk/src/wp-includes/class-IXR.php (29403 => 29404)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/src/wp-includes/class-IXR.php 2014-08-06 17:23:49 UTC (rev 29403)
+++ trunk/src/wp-includes/class-IXR.php 2014-08-06 17:37:22 UTC (rev 29404)
</span><span class="lines">@@ -203,11 +203,37 @@
</span><span class="cx"> {
</span><span class="cx"> // first remove the XML declaration
</span><span class="cx"> // merged from WP #10698 - this method avoids the RAM usage of preg_replace on very large messages
</span><del>- $header = preg_replace( '/<\?xml.*?\?'.'>/', '', substr($this->message, 0, 100), 1);
- $this->message = substr_replace($this->message, $header, 0, 100);
- if (trim($this->message) == '') {
</del><ins>+ $header = preg_replace( '/<\?xml.*?\?'.'>/s', '', substr( $this->message, 0, 100 ), 1 );
+ $this->message = trim( substr_replace( $this->message, $header, 0, 100 ) );
+ if ( '' == $this->message ) {
</ins><span class="cx"> return false;
</span><span class="cx"> }
</span><ins>+
+ // Then remove the DOCTYPE
+ $header = preg_replace( '/^<!DOCTYPE[^>]*+>/i', '', substr( $this->message, 0, 200 ), 1 );
+ $this->message = trim( substr_replace( $this->message, $header, 0, 200 ) );
+ if ( '' == $this->message ) {
+ return false;
+ }
+
+ // Check that the root tag is valid
+ $root_tag = substr( $this->message, 0, strcspn( substr( $this->message, 0, 20 ), "> \t\r\n" ) );
+ if ( '<!DOCTYPE' === strtoupper( $root_tag ) ) {
+ return false;
+ }
+ if ( ! in_array( $root_tag, array( '<methodCall', '<methodResponse', '<fault' ) ) ) {
+ return false;
+ }
+
+ // Bail if there are too many elements to parse
+ $element_limit = 30000;
+ if ( function_exists( 'apply_filters' ) ) {
+ $element_limit = apply_filters( 'xmlrpc_element_limit', $element_limit );
+ }
+ if ( $element_limit && 2 * $element_limit < substr_count( $this->message, '<' ) ) {
+ return false;
+ }
+
</ins><span class="cx"> $this->_parser = xml_parser_create();
</span><span class="cx"> // Set XML parser to take the case of tags in to account
</span><span class="cx"> xml_parser_set_option($this->_parser, XML_OPTION_CASE_FOLDING, false);
</span></span></pre>
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