diff --git a/lib/core/settings.py b/lib/core/settings.py
index 32ce8db7c..8872e8374 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -19,7 +19,7 @@ from lib.core.enums import DBMS_DIRECTORY_NAME
 from lib.core.enums import OS
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.3.1.41"
+VERSION = "1.3.1.42"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)
diff --git a/txt/checksum.md5 b/txt/checksum.md5
index 72dff6815..b774dc306 100644
--- a/txt/checksum.md5
+++ b/txt/checksum.md5
@@ -49,7 +49,7 @@ fe370021c6bc99daf44b2bfc0d1effb3  lib/core/patch.py
 9a7d68d5fa01561500423791f15cc676  lib/core/replication.py
 3179d34f371e0295dd4604568fb30bcd  lib/core/revision.py
 d6269c55789f78cf707e09a0f5b45443  lib/core/session.py
-df03aea681ed80e9850697b60db1b0eb  lib/core/settings.py
+da97136510824fdec55455dde8c674c3  lib/core/settings.py
 a8a7501d1e6b21669b858a62e921d191  lib/core/shell.py
 5dc606fdf0afefd4b305169c21ab2612  lib/core/subprocessng.py
 eec3080ba5baca44c6de4595f1c92a0d  lib/core/target.py
@@ -429,7 +429,7 @@ fb6be55d21a70765e35549af2484f762  waf/__init__.py
 a3ee375714987acccc26d1b07c2e8af7  waf/isaserver.py
 ce9cf35919a92d65347bb74ca0c5c86f  waf/jiasule.py
 f44ed04eeb4287c11ce277703ec7d72d  waf/knownsec.py
-d50d82bec48814eb5b699d302dbdae9a  waf/kona.py
+8c3977c543ca4ec6d4231f604217cf94  waf/kona.py
 d4f36e44f496f4d51baa3241eabc60fd  waf/malcare.py
 4397c299d27a500851726444fb89759e  waf/modsecurity.py
 78af8e791207db9723a14bddeb7524af  waf/naxsi.py
@@ -459,6 +459,7 @@ a840fcd2bb042694f9aab2859e7c9b30  waf/sonicwall.py
 205beb7ed5e70119f8700a9e295b6a4a  waf/tencent.py
 ef6f83952ce6b5a7bbb19f9b903af2b6  waf/teros.py
 ba0fb1e6b815446b9d6f30950900fc80  waf/trafficshield.py
+1c15216824f96e23a76591ac29eb6d7d  waf/urlmaster.py
 876c746d96193071271cb8b7e00e1422  waf/urlscan.py
 80314083009c87d32bf32d84e8bbb7be  waf/varnish.py
 455bb16f552e7943e0a5cf35e83a74ea  waf/virusdie.py
diff --git a/waf/kona.py b/waf/kona.py
index be124a92c..c6c8bfaf8 100644
--- a/waf/kona.py
+++ b/waf/kona.py
@@ -17,8 +17,7 @@ def detect(get_page):
 
     for vector in WAF_ATTACK_VECTORS:
         page, headers, code = get_page(get=vector)
-        retval = code in (400, 403, 501) and all(_ in (page or "") for _ in ("Access Denied", "You don't have permission to access", "on this server", "Reference"))
-        retval |= re.search(r"AkamaiGHost", headers.get(HTTP_HEADER.SERVER, ""), re.I) is not None
+        retval = code >= 400 and re.search(r"AkamaiGHost", headers.get(HTTP_HEADER.SERVER, ""), re.I) is not None
         if retval:
             break
 
diff --git a/waf/urlmaster.py b/waf/urlmaster.py
new file mode 100644
index 000000000..65d31c03b
--- /dev/null
+++ b/waf/urlmaster.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python
+
+"""
+Copyright (c) 2006-2019 sqlmap developers (http://sqlmap.org/)
+See the file 'LICENSE' for copying permission
+"""
+
+from lib.core.settings import WAF_ATTACK_VECTORS
+
+__product__ = "Url Master SecurityCheck (iFinity/DotNetNuke)"
+
+def detect(get_page):
+    retval = False
+
+    for vector in WAF_ATTACK_VECTORS:
+        page, _, code = get_page(get=vector)
+        retval = code >= 400 and all(_ in (page or "") for _ in ("UrlMaster", "UrlRewriteModule", "SecurityCheck"))
+        if retval:
+            break
+
+    return retval