Merge pull request #10586 from nextcloud/fix/noid/check_if_ua_is_set

Check if HTTP_USER_AGENT is set before using it
nextcloud · Aug 8, 2018 · e7e30ac · e7e30ac
2 parents 3884038 + c74a525
commit e7e30ac
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/lib/private/legacy/util.php b/lib/private/legacy/util.php
@@ -1535,6 +1535,10 @@ public static function needUpgrade(\OC\SystemConfig $config) {
 	 * @return boolean
 	 */
 	public static function isIe() {
+		if (!isset($_SERVER['HTTP_USER_AGENT'])) {
+			return false;
+		}
+
 		return preg_match(Request::USER_AGENT_IE, $_SERVER['HTTP_USER_AGENT']) === 1;
 	}