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Handle too-short response in s7-info. See #2117

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dmiller
2020-09-09 17:16:13 +00:00
parent d3f47863ee
commit e278afa57d
1 changed files with 4 additions and 0 deletions
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scripts/s7-info.nse
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@@ -128,6 +128,10 @@ local function second_parse_response(response, output)
-- change offset to 4, this is where most of valid PLCs will fall -- change offset to 4, this is where most of valid PLCs will fall
offset = 4 offset = 4
end end
if #response < 142 + offset then
stdnse.debug1("Short response cannot be parsed.")
return nil
end
-- parse system name -- parse system name
output["System Name"] = string.unpack("z", response, 40 + offset) output["System Name"] = string.unpack("z", response, 40 + offset)
-- parse module type -- parse module type