Description
EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser. When processing the CWD (Change Working Directory) command, the server fails to properly validate the length of the input string, allowing attackers to overwrite memory on the stack. This flaw enables remote code execution without authentication, as EasyFTP allows anonymous access by default. The vulnerability was resolved in version 1.7.0.12, after which the product was renamed “UplusFtp.”
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| KMiNT21 Software | EasyFTP Server | ≤ 1.7.0.11 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Metasploit 1 module
-
EasyFTP Server CWD Command Stack Buffer Overflow
exploit/windows/ftp/easyftp_cwd_fixret
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://seclists.org/bugtraq/2010/Feb/202 third-party-advisory exploit
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/easyftp_cwd_fixret.rb exploit
- https://paulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite/ technical-description exploit
- https://www.exploit-db.com/exploits/12312 exploit
- https://www.exploit-db.com/exploits/16737 exploit
- https://www.exploit-db.com/exploits/11668 exploit
- https://www.exploit-db.com/exploits/14402 exploit
- https://www.vulncheck.com/advisories/easyftp-server-cwd-command-stack-buffer-overflow third-party-advisory