module

EasyFTP Server MKD Command Stack Buffer Overflow

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Disclosed
2010-04-04
Created
2018-05-30

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 'MKD' commands, which
leads to a stack based buffer overflow.

NOTE: EasyFTP allows anonymous access by default. However, in order to access the
'MKD' command, you must have access to an account that can create directories.

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

x90c geinblues@gmail.com
jduck jduck@metasploit.com

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_mkd_fixret
    msf exploit(easyftp_mkd_fixret) > show targets
        ...targets...
    msf exploit(easyftp_mkd_fixret) > set TARGET < target-id >
    msf exploit(easyftp_mkd_fixret) > show options
        ...show and set options...
    msf exploit(easyftp_mkd_fixret) > exploit
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