module

OpenTFTP SP 1.4 Error Packet Overflow

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Disclosed
2008-07-05
Created
2018-05-30

Description

This module exploits a buffer overflow in OpenTFTP Server SP 1.4. The vulnerable
condition triggers when the TFTP opcode is configured as an error packet, the TFTP
service will then format the message using a sprintf() function, which causes an
overflow, therefore allowing remote code execution under the context of SYSTEM.

The offset (to EIP) is specific to how the TFTP was started (as a 'Stand Alone',
or 'Service'). By default the target is set to 'Service' because that's the default
configuration during OpenTFTP Server SP 1.4's installation.

Authors

tixxDZ
steponequit

Platform

Windows

References

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:


    msf > use exploit/windows/tftp/opentftp_error_code
    msf exploit(opentftp_error_code) > show targets
        ...targets...
    msf exploit(opentftp_error_code) > set TARGET < target-id >
    msf exploit(opentftp_error_code) > show options
        ...show and set options...
    msf exploit(opentftp_error_code) > exploit
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