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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
|
#!/usr/bin/ruby
# iExploder browser Harness (test a single web browser)
#
# Copyright 2010 Thomas Stromberg - All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#----------------------------------------------------------------------------
# PLEASE NOTE:
#
# You must disable automatic session restoring for this to be useful.
#
# chrome --incognito
# opera --nosession -newprivatetab
# firefox -private
require 'cgi'
require 'open-uri'
require 'optparse'
require './iexploder.rb'
require './scanner.rb'
MAC_CRASH_PATH = "#{ENV['HOME']}/Library/Logs/CrashReporter"
TESTCASE_URL = "http://127.0.0.1:3100/iexploder.cgi"
class BrowserHarness
def initialize(port, config_path, log_dir, test_dir, watchdog_timer, scan_timer)
@app_base_url = "http://127.0.0.1:#{port}/"
@app_url = "#{@app_base_url}iexploder.cgi"
@port = port
@log_dir = log_dir
@server_log_path = "#{log_dir}/iexploder_webserver-#{port}.log"
@client_log_path = "#{log_dir}/iexploder_harness-#{port}.log"
@test_dir = test_dir
@watchdog_timer = watchdog_timer
@scan_timer = scan_timer
@config_path = config_path
@ie = IExploder.new(@config_path)
@ie.cgi_url = @app_url
@browser_id = nil
@browser_name = nil
msg("Client log: #{@client_log_path}")
msg("Server log: #{@server_log_path}")
@server_pid = launch_server()
end
def msg(text)
now = Time.now()
msg = ">>> #{@browser_name}:#{@port} | #{now}: #{text}"
puts msg
STDOUT.flush
f = File.open(@client_log_path, 'a')
f.puts msg
f.close
end
def launch_server()
args = ['./webserver.rb', "-p#{@port}", "-c#{@config_path}", "-l#{@server_log_path}"]
pids = fork { exec(*args) }
msg("Server args: #{args.inspect}")
msg("Server pid: #{pids.inspect}")
return pids
end
def launch_browser(args, url)
if ! File.exist?(args[0])
msg("First argument does not appear to be an executable file: #{args[0]}")
kill_server()
exit
end
browser = File.basename(args[0])
@browser_name = File.basename(browser)
if browser =~ /\.app$/
pids = launch_mac_browser(args, url)
else
pids = launch_posix_browser(args, url)
end
sleep(@scan_timer * 3)
if ! File.size?(@server_log_path)
puts "#{@server_log_path} was never written to. Unable to launch browser?"
kill_server()
exit
end
return pids
end
def launch_posix_browser(args, url)
browser = File.basename(args[0])
msg("Killing browser processes: #{browser}")
system("pkill #{browser} && pkill -9 #{browser}")
args = args + [url]
msg("Launching browser: #{args.inspect}")
browser_pid = fork {
exec(*args)
}
return [browser_pid]
end
def find_pids(text)
# Only tested on Mac OS X.
pids = []
`ps -x`.each do |proc_line|
if proc_line =~ /^ *(\d+).*#{text}/
pid = $1.to_i
# Do not include yourself.
if pid != Process.pid
pids << $1.to_i
end
end
end
return pids
end
def launch_mac_browser(args, url)
# This is dedicated to Safari.
if args.length > 1
msg(".app type launches do not support arguments, ignoring #{args[1..99].inspect}")
end
browser = args[0]
pids = find_pids(browser)
if pids
kill_pids(find_pids(browser))
sleep(2)
end
command = "open -a \"#{browser}\" \"#{url}\""
msg(".app open command: #{command}")
system(command)
return find_pids(browser)
end
def kill_pids(pids)
pids.each do |pid|
msg("Killing #{pid}")
begin
Process.kill("INT", pid)
sleep(0.5)
Process.kill("KILL", pid)
rescue
sleep(0.1)
end
end
end
def encode_browser()
return @browser_id.gsub(' ', '_').gsub(';', '').gsub('/', '-').gsub(/[\(\):\!\@\#\$\%\^\&\*\+=\{\}\[\]\'\"\<\>\?\|\\]/, '').gsub(/_$/, '').gsub(/^_/, '')
end
def kill_server()
kill_pids([@server_pid])
end
def parse_test_url(value)
current_vars = nil
test_num = nil
subtest_data = nil
lookup_values = false
if value =~ /iexploder.cgi(.*)/
current_vars = $1
if current_vars =~ /[&\?]t=(\d+)/
test_num = $1
end
if current_vars =~ /[&\?]s=([\d_,]+)/
subtest_data = $1
end
if current_vars =~ /[&\?]l=(\w+)/
lookup_value = $1
end
else
msg("Unable to parse url in #{value}")
return [nil, nil, nil, nil]
end
return [current_vars, test_num, subtest_data, lookup_value]
end
def check_log_status()
timestamp, uri, user_agent = open("#{@app_base_url}last_page.cgi").read().chomp.split(' ')
age = (Time.now() - timestamp.to_i).to_i
if not @browser_id
@browser_id = CGI.unescape(user_agent)
msg("My browser is #{@browser_id}")
end
return [age, uri]
end
def save_testcase(url, case_type=nil)
msg("Saving testcase: #{url}")
vars, test_num, subtest_data, lookup_value = parse_test_url(url)
if not case_type
case_type = 'testcase'
end
testcase_name = ([case_type, encode_browser(), 'TEST', test_num, subtest_data].join('-')).gsub(/-$/, '') + ".html"
testcase_path = "#{@test_dir}/#{testcase_name}"
data = open(url).read()
# Slow down our redirection time, and replace our testcase urls.
data.gsub!(/0;URL=\/iexploder.*?\"/, "1;URL=#{testcase_name}\"")
data.gsub!(/window\.location=\"\/iexploder.*?\"/, "window\.location=\"#{testcase_name}\"")
# I wish I did not have to do this, but the reality is that I can't imitate header fuzzing
# without a webservice in the backend. Change all URL's to use a well known localhost
# port.
data.gsub!(/\/iexploder.cgi/, TESTCASE_URL)
f = File.open(testcase_path, 'w')
f.write(data)
f.close
msg("Wrote testcase #{testcase_path}")
return testcase_path
end
def calculate_next_url(test_num, subtest_data)
@ie.test_num = test_num.to_i
@ie.subtest_data = subtest_data
if subtest_data and subtest_data.length > 0
(width, offsets) = @ie.parseSubTestData(subtest_data)
# We increment within combo_creator
(width, offsets, lines) = combine_combo_creator(@ie.config['html_tags_per_page'], width, offsets)
return @ie.generateTestUrl(@ie.nextTestNum(), width, offsets)
else
return @ie.generateTestUrl(@ie.nextTestNum())
end
end
def find_crash_logs(max_age)
crashed_files = []
check_files = Dir.glob("*core*")
if File.exists?(MAC_CRASH_PATH)
check_files = check_files + Dir.glob("#{MAC_CRASH_PATH}/*.*")
end
check_files.each do |file|
mtime = File.stat(file).mtime
age = (Time.now() - mtime).to_i
if age < max_age
msg("#{file} is only #{age}s old: #{mtime}")
crashed_files << file
end
end
return crashed_files
end
def test_browser(args, test_num, random_mode=false)
# NOTE: random_mode is not yet supported.
browser_pids = []
subtest_data = nil
@ie.test_num = test_num
@ie.random_mode = random_mode
next_url = @ie.generateTestUrl(test_num)
while next_url
msg("Starting at: #{next_url}")
if browser_pids
kill_pids(browser_pids)
end
browser_pids = launch_browser(args, next_url)
test_is_running = true
crash_files = []
while test_is_running
sleep(@scan_timer)
begin
age, request_uri = check_log_status()
rescue
msg("Failed to get status. webserver likely crashed.")
kill_pids([@server_pid])
@server_pid = launch_server()
next_url = @ie.generateTestUrl(test_num)
test_is_running = false
next
end
vars, test_num, subtest_data, lookup_value = parse_test_url(request_uri)
if lookup_value == 'survived_redirect'
msg("We survived #{vars}. Bummer, could not repeat crash. Moving on.")
test_is_running = false
next_url = calculate_next_url(test_num, subtest_data)
next
elsif age > @watchdog_timer
msg("Stuck at #{vars}, waited for #{@watchdog_timer}s. Killing browser.")
kill_pids(browser_pids)
current_url = "#{@app_url}#{vars}"
# save_testcase(current_url, 'possible')
crash_files = find_crash_logs(@watchdog_timer + (@scan_timer * 2))
if crash_files.length > 0
msg("Found recent crash logs: #{crash_files.inspect} - last page: #{current_url}")
end
if vars =~ /THE_END/
msg("We hung at the end. Saving a testcase just in case.")
save_testcase(current_url)
next_url = calculate_next_url(test_num, nil)
test_is_running = false
next
end
# This is for subtesting
if subtest_data
if lookup_value
msg("Confirmed crashing/hanging page at #{current_url} - saving testcase.")
save_testcase(current_url)
next_url = calculate_next_url(test_num, nil)
test_is_running = false
next
else
msg("Stopped at #{current_url}. Attempting to reproduce simplified crash/hang condition.")
browser_pids = launch_browser(args, "#{current_url}&l=test_redirect")
end
# Normal testing goes here
else
if lookup_value
msg("Reproducible crash/hang at #{current_url}, generating smaller test case.")
url = current_url.gsub(/&l=(\w+)/, '')
browser_pids = launch_browser(args, "#{url}&s=0")
else
msg("Stopped at #{current_url}. Attempting to reproduce crash/hang condition.")
browser_pids = launch_browser(args, "#{current_url}&l=test_redirect")
end
end
elsif age > @scan_timer
msg("Waiting for #{vars} to finish loading... (#{age}s of #{@watchdog_timer}s)")
end
end
end
end
end
if $0 == __FILE__
options = {
:port => rand(16000).to_i + 16000,
:test_dir => File.dirname($0) + '/../output',
:log_dir => File.dirname($0) + '/../output',
:test_num => nil,
:watchdog_timer => 60,
:scan_timer => 5,
:config_path => 'config.yaml',
:random_mode => false
}
optparse = OptionParser.new do |opts|
opts.banner = "Usage: browser_harness.rb [options] -- <browser path> <browser options>"
opts.on( '-t', '--test NUM', 'Test to start at' ) { |test_num| options[:test_num] = test_num.to_i }
opts.on( '-p', '--port NUM', 'Listen on TCP port NUM (random)' ) { |port| options[:port] = port.to_i }
opts.on( '-c', '--config PATH', 'Use PATH for configuration file' ) { |path| options[:config_path] = path }
opts.on( '-d', '--testdir PATH', 'Use PATH to save testcases (/tmp)' ) { |path| options[:test_dir] = path }
opts.on( '-l', '--logdir PATH', 'Use PATH to save logs (/tmp)' ) { |path| options[:log_dir] = path }
opts.on( '-w', '--watchdog NUM', 'How many seconds to wait for pages to load (45s)' ) { |sec| options[:watchdog_timer] = sec.to_i }
opts.on( '-r', '--random', 'Generate test numbers pseudo-randomly' ) { options[:random_mode] = true }
opts.on( '-s', '--scan NUM', 'How often to check for new log data (5s)' ) { |sec| options[:scan_timer] = sec.to_i }
opts.on( '-h', '--help', 'Display this screen' ) { puts opts; exit }
end
optparse.parse!
if options[:port] == 0
puts "Unable to parse port option. Try adding -- as an argument before you specify your browser location."
exit
end
if ARGV.length < 1
puts "No browser specified. Perhaps you need some --help?"
exit
end
puts "options: #{options.inspect}"
puts "browser: #{ARGV.inspect}"
harness = BrowserHarness.new(
options[:port],
options[:config_path],
options[:log_dir],
options[:test_dir],
options[:watchdog_timer],
options[:scan_timer]
)
harness.test_browser(ARGV, options[:test_num], options[:random_mode])
end
|