OMG - unsanitized shell command. Thanks to Niels Teusink. (CVE-2009-1579)

doc/ChangeLog

@@ -301,6 +301,8 @@ Version 1.5.2 - SVN
   - Fixed the lack of sanitizing of contrib/decrypt_headers.php input;
     also includes general cleanup of that page (Thanks to Niels Teusink).
     [also CVE-2009-1578]
+  - Fixed unsanitized shell command in example IMAP username mapping
+    function (map_yp_alias) (Thanks to Niels Teusink). [CVE-2009-1579]
 
 Version 1.5.1 (branched on 2006-02-12)
 --------------------------------------

functions/imap_general.php

@@ -1436,6 +1436,6 @@ function sqimap_get_user_server ($imap_server, $username) {
  * @since 1.3.0
  */
 function map_yp_alias($username) {
-   $yp = `ypmatch $username aliases`;
+   $yp = `ypmatch ' . escapeshellarg($username) . ' aliases`;
    return chop(substr($yp, strlen($username)+1));
 }