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module

EasyFTP Server CWD Command Stack Buffer Overflow

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Disclosed
Feb 16, 2010
Created
May 30, 2018

Description

This module exploits a stack-based buffer overflow in EasyFTP Server 1.7.0.11
and earlier. EasyFTP fails to check input size when parsing 'CWD' commands, which
leads to a stack based buffer overflow. EasyFTP allows anonymous access by
default; valid credentials are typically unnecessary to exploit this vulnerability.

After version 1.7.0.12, this package was renamed "UplusFtp".

This exploit utilizes a small piece of code that I\'ve referred to as 'fixRet'.
This code allows us to inject of payload of ~500 bytes into a 264 byte buffer by
'fixing' the return address post-exploitation. See references for more information.

Authors

Paul Makowski [email protected]
jduck [email protected]

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/ftp/easyftp_cwd_fixret
    msf exploit(easyftp_cwd_fixret) > show targets
        ...targets...
    msf exploit(easyftp_cwd_fixret) > set TARGET < target-id >
    msf exploit(easyftp_cwd_fixret) > show options
        ...show and set options...
    msf exploit(easyftp_cwd_fixret) > exploit
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