add nil checks to address bug discovered by Mike

http://seclists.org/nmap-dev/2014/q2/120
2026-01-06 14:39:03 +00:00 · 2014-04-17 01:00:01 +00:00
parent d2009ab250
commit 91e1d21cc1
2 changed files with 6 additions and 0 deletions
--- a/scripts/snmp-ios-config.nse
+++ b/scripts/snmp-ios-config.nse
@@ -179,6 +179,9 @@ action = function(host, port)

  local result
  result = snmp.fetchFirst(response)
+  if not result then
+    return
+  end

  if result == 3 then
    result = ( infile and infile:getContent() )