Description
LeapFTP < 3.1.x contains a stack-based buffer overflow vulnerability in its FTP client parser. When the client receives a directory listing containing a filename longer than 528 bytes, the application fails to properly bound-check the input and overwrites the Structured Exception Handler (SEH) chain. This allows an attacker operating a malicious FTP server to execute arbitrary code on the victim’s machine when the file is listed or downloaded.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| LeapWare | LeapFTP | < 3.1.* | 3.1.* |
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.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
-
LeapFTP 3.0.1 Stack Buffer Overflow
exploit/windows/ftp/leapftp_list_reply
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/leapftp_list_reply.rb exploit
- https://www.exploit-db.com/exploits/16704 exploit
- https://web.archive.org/web/20111016194057/https://www.corelan.be/index.php/2010/10/12/death-of-an-ftp-client/ technical-description exploit
- https://web.archive.org/web/20111013232627/http://www.leapware.com/ vendor-advisory patch
- https://www.vulncheck.com/advisories/leapftp-stack-buffer-overflow third-party-advisory