From: Charles-Henri Bruyand <charles-henri.bruyand@open-xchange.com>
Date: Wed, 2 May 2018 14:18:50 +0000 (+0200)
Subject: check if parameter has been submitted before accessing it
X-Git-Tag: rec-4.1.3~4^2~6^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5c6c044891310d899e631a3608a30b70e3f0b550;p=pdns

check if parameter has been submitted before accessing it

(cherry picked from commit 46d03ec1bde4eb3241f510f300e2a302dcfe65d0)
---

diff --git a/pdns/ws-recursor.cc b/pdns/ws-recursor.cc
index 748441c9a..16a58b864 100644
--- a/pdns/ws-recursor.cc
+++ b/pdns/ws-recursor.cc
@@ -373,7 +373,7 @@ static void apiServerCacheFlush(HttpRequest* req, HttpResponse* resp) {
     throw HttpMethodNotAllowedException();
 
   DNSName canon = apiNameToDNSName(req->getvars["domain"]);
-  bool subtree = (req->getvars["subtree"].compare("true") == 0);
+  bool subtree = (req->getvars.count("subtree") > 0 && req->getvars["subtree"].compare("true") == 0);
 
   int count = broadcastAccFunction<uint64_t>(boost::bind(pleaseWipeCache, canon, subtree));
   count += broadcastAccFunction<uint64_t>(boost::bind(pleaseWipePacketCache, canon, subtree));