adding privilege check on move and rename operations

lib/connector/sabre/node.php

@@ -78,6 +78,11 @@ abstract class OC_Connector_Sabre_Node implements Sabre_DAV_INode, Sabre_DAV_IPr
 	 */
 	public function setName($name) {
 
+		// rename is only allowed if the update privilege is granted
+		if (!\OC\Files\Filesystem::isUpdatable($this->path)) {
+			throw new \Sabre_DAV_Exception_Forbidden();
+		}
+
 		list($parentPath, ) = Sabre_DAV_URLUtil::splitPath($this->path);
 		list(, $newName) = Sabre_DAV_URLUtil::splitPath($name);
 
@@ -135,6 +140,12 @@ abstract class OC_Connector_Sabre_Node implements Sabre_DAV_INode, Sabre_DAV_IPr
 	 *  Even if the modification time is set to a custom value the access time is set to now.
 	 */
 	public function touch($mtime) {
+
+		// touch is only allowed if the update privilege is granted
+		if (!\OC\Files\Filesystem::isUpdatable($this->path)) {
+			throw new \Sabre_DAV_Exception_Forbidden();
+		}
+
 		\OC\Files\Filesystem::touch($this->path, $mtime);
 	}
 

lib/connector/sabre/objecttree.php

@@ -64,7 +64,29 @@ class ObjectTree extends \Sabre_DAV_ObjectTree {
 		list($sourceDir,) = \Sabre_DAV_URLUtil::splitPath($sourcePath);
 		list($destinationDir,) = \Sabre_DAV_URLUtil::splitPath($destinationPath);
 
-		Filesystem::rename($sourcePath, $destinationPath);
+		// check update privileges
+		if ($sourceDir === $destinationDir) {
+			// for renaming it's enough to check if the sourcePath can be updated
+			if (!\OC\Files\Filesystem::isUpdatable($sourcePath)) {
+				throw new \Sabre_DAV_Exception_Forbidden();
+			}
+		} else {
+			// for a full move we need update privileges on sourcePath and sourceDir as well as destinationDir
+			if (!\OC\Files\Filesystem::isUpdatable($sourcePath)) {
+				throw new \Sabre_DAV_Exception_Forbidden();
+			}
+			if (!\OC\Files\Filesystem::isUpdatable($sourceDir)) {
+				throw new \Sabre_DAV_Exception_Forbidden();
+			}
+			if (!\OC\Files\Filesystem::isUpdatable($destinationDir)) {
+				throw new \Sabre_DAV_Exception_Forbidden();
+			}
+		}
+
+		$renameOkay = Filesystem::rename($sourcePath, $destinationPath);
+		if (!$renameOkay) {
+			throw new \Sabre_DAV_Exception_Forbidden('');
+		}
 
 		$this->markDirty($sourceDir);
 		$this->markDirty($destinationDir);