- Patch #482646 by Dave Reid et al: check for existence of ['HTTP_USER_AGENT'] for the SimpleTest user agent.

1 files changed, 1 insertions, 1 deletions

diff --git a/install.php b/install.php
index 4c0face7e..1d94a7fb3 100644
--- a/install.php
+++ b/install.php
@@ -28,7 +28,7 @@ function install_main() {
   // The user agent header is used to pass a database prefix in the request when
   // running tests. However, for security reasons, it is imperative that no
   // installation be permitted using such a prefix.
-  if (preg_match("/^simpletest\d+$/", $_SERVER['HTTP_USER_AGENT'])) {
+  if (isset($_SERVER['HTTP_USER_AGENT']) && preg_match("/^simpletest\d+$/", $_SERVER['HTTP_USER_AGENT'])) {
     header($_SERVER['SERVER_PROTOCOL'] . ' 403 Forbidden');
     exit;
   }