Changeset 23329 for trunk/wp-includes/comment.php

Timestamp:

01/22/2013 10:30:08 PM (13 years ago)

Author:

nacin

Message:

Validate pingback source URIs. Less verbose errors.

File:

• trunk/wp-includes/comment.php (modified) (1 diff)

trunk/wp-includes/comment.php

@@ -1954 +1954 @@
 }
 
+/**
+ * Default filter attached to pingback_ping_source_uri to validate the pingback's Source URI
+ *
+ * @since 3.5.1
+ *
+ * @param string $source_uri
+ * @return string
+ */
+function pingback_ping_source_uri( $source_uri ) {
+    $uri = esc_url_raw( $source_uri, array( 'http', 'https' ) );
+    if ( ! $uri )
+        return '';
+
+    $parsed_url = @parse_url( $uri );
+    if ( ! $parsed_url )
+        return '';
+
+    if ( isset( $parsed_url['user'] ) || isset( $parsed_url['pass'] ) )
+        return '';
+
+    if ( false !== strpos( $parsed_url['host'], ':' ) )
+        return '';
+
+    $parsed_home = @parse_url( get_option( 'home' ) );
+
+    $same_host = strtolower( $parsed_home['host'] ) === strtolower( $parsed_url['host'] );
+
+    if ( ! $same_host ) {
+        $host = trim( $parsed_url['host'], '.' );
+        if ( preg_match( '#^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$#', $host ) ) {
+            $ip = $host;
+        } else {
+            $ip = gethostbyname( $host );
+            if ( $ip === $host ) // Error condition for gethostbyname()
+                $ip = false;
+        }
+        if ( $ip ) {
+            if ( '127.0.0.1' === $ip )
+                return '';
+            $parts = array_map( 'intval', explode( '.', $ip ) );
+            if ( 10 === $parts[0] )
+                return '';
+            if ( 172 === $parts[0] && 16 <= $parts[1] && 31 >= $parts[1] )
+                return '';
+            if ( 192 === $parts[0] && 168 === $parts[1] )
+                return '';
+        }
+    }
+
+    if ( empty( $parsed_url['port'] ) )
+        return $uri;
+
+    $port = $parsed_url['port'];
+    if ( 80 === $port || 443 === $port || 8080 === $port )
+        return $uri;
+
+    if ( $parsed_home && $same_host && $parsed_home['port'] === $port )
+        return $uri;
+
+    return '';
+}
+
+/**
+ * Default filter attached to xmlrpc_pingback_error.
+ *
+ * Returns a generic pingback error code unless the error code is 48,
+ * which reports that the pingback is already registered.
+ *
+ * @since 3.5.1
+ * @link http://www.hixie.ch/specs/pingback/pingback#TOC3
+ *
+ * @param IXR_Error $ixr_error
+ * @return IXR_Error
+ */
+function xmlrpc_pingback_error( $ixr_error ) {
+    if ( $ixr_error->code === 48 )
+        return $ixr_error;
+    return new IXR_Error( 0, '' );
+}
+
 //
 // Cache