1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
description = [[
Extracts and outputs HTML and JavaScript comments from HTTP responses.
]]
---
-- @usage nmap -p80 --script http-comments-displayer.nse <host>
--
-- This scripts uses patterns to extract HTML comments from HTTP
-- responses and writes these to the command line.
--
-- @args http-comments-displayer.singlepages Some single pages
-- to check for comments. For example, {"/", "/wiki"}.
-- Default: nil (crawler mode on)
-- @args http-comments-displayer.context declares the number of chars
-- to extend our final strings. This is useful when we need to
-- to see the code that the comments are referring to.
-- Default: 0, Maximum Value: 50
--
--
-- @output
-- PORT STATE SERVICE REASON
-- 80/tcp open http syn-ack
-- | http-comments-displayer:
-- | Path: /
-- | Line number: 214
-- | Comment:
-- | <!-- This needs fixing. -->
-- |
-- | Path: /register.php
-- | Line number: 15
-- | Comment:
-- |_ /* We should avoid the hardcoding here */
--
---
categories = {"discovery", "safe"}
author = "George Chatzisofroniou"
license = "Same as Nmap--See https://nmap.org/book/man-legal.html"
local http = require "http"
local shortport = require "shortport"
local stdnse = require "stdnse"
local table = require "table"
local string = require "string"
local httpspider = require "httpspider"
PATTERNS = {
"<!%-.-%-!?>", -- HTML comment
"/%*.-%*/", -- Javascript multiline comment
"[ ,\n]//.-\n" -- Javascript one-line comment. Could be better?
}
portrule = shortport.port_or_service( {80, 443}, {"http", "https"}, "tcp", "open")
-- Returns comment's line number by counting the occurrences of the
-- new line character ("\n") from the start of the HTML file until
-- the related comment.
local getLineNumber = function(body, comment)
local partofresponse = body:find(comment, 1, true)
partofresponse = body:sub(0, partofresponse)
local _, count = string.gsub(partofresponse, "\n", "\n")
return count + 1
end
action = function(host, port)
local context = stdnse.get_script_args("http-comments-displayer.context")
local singlepages = stdnse.get_script_args("http-comments-displayer.singlepages")
local comments = {}
local crawler = httpspider.Crawler:new( host, port, '/', { scriptname = SCRIPT_NAME, withinhost = 1 } )
if (not(crawler)) then
return
end
crawler:set_timeout(10000)
if context then
if (tonumber(context) > 100) then
context = 100
end
-- Lua's abbreviated patterns support doesn't have a fixed-number-of-repetitions syntax.
for i, pattern in ipairs(PATTERNS) do
PATTERNS[i] = string.rep(".", context) .. PATTERNS[i] .. string.rep(".", context)
end
end
local index, k, target, response, path
while (true) do
if singlepages then
k, target = next(singlepages, index)
if (k == nil) then
break
end
response = http.get(host, port, target)
path = target
else
local status, r = crawler:crawl()
-- if the crawler fails it can be due to a number of different reasons
-- most of them are "legitimate" and should not be reason to abort
if (not(status)) then
if (r.err) then
return stdnse.format_output(false, r.reason)
else
break
end
end
response = r.response
path = tostring(r.url)
end
if response.body then
for i, pattern in ipairs(PATTERNS) do
for c in string.gmatch(response.body, pattern) do
local linenumber = getLineNumber(response.body, c)
comments[c] = "\nPath: " .. path .. "\nLine number: " .. linenumber .. "\nComment: \n"
end
end
if (index) then
index = index + 1
else
index = 1
end
end
end
-- If the table is empty.
if next(comments) == nil then
return "Couldn't find any comments."
end
-- Create a nice output.
local results = {}
for c, _ in pairs(comments) do
table.insert(results, {_, {{c}}})
end
results.name = crawler:getLimitations()
return stdnse.format_output(true, results)
end
|