------------------------------------------------------------------------- Dotclear <= 2.6.2 (XML-RPC Interface) Authentication Bypass Vulnerability ------------------------------------------------------------------------- [-] Software Link: http://dotclear.org/ [-] Affected Versions: Version 2.6.2 and probably prior versions. [-] Vulnerability Description: The vulnerable code is located in the dcXmlRpc::setUser() method (inc/core/class.dc.xmlrpc.php): 262. /* Internal methods 263. --------------------------------------------------- */ 264. private function setUser($user_id,$pwd) 265. { 266. if ($this->core->auth->userID() == $user_id) { 267. return true; 268. } 269. 270. if ($this->core->auth->checkUser($user_id,$pwd) !== true) { 271. throw new Exception('Login error'); 272. } 273. 274. return true; The vulnerability exists because of the method not properly verifying the provided password before being used in a call to the dcAuth::checkUser() method at line 270. This could be exploited to bypass the authentication mechanism by sending an XML-RPC request with a valid username and an empty password. Successful exploitation of this vulnerability requires the XML-RPC interface to be enabled (disabled by default). [-] Solution: Update to version 2.6.3. [-] Disclosure Timeline: [14/05/2014] - Vendor notified [15/05/2014] - Vendor response [16/05/2014] - Version 2.6.3 released: http://dotclear.org/blog/post/2014/05/16/Dotclear-2.6.3 [16/05/2014] - CVE number requested [19/05/2014] - CVE number assigned [21/05/2014] - Public disclosure [-] CVE Reference: The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2014-3781 to this vulnerability. [-] Credits: Vulnerability discovered by Egidio Romano. [-] Original Advisory: http://karmainsecurity.com/KIS-2014-05
