CVE-2010-20049
LeapFTP < 3.1.x Stack Buffer Overflow
- State
- Published
- Severity
- 9.3 Critical
- Published
- Aug 20, 2025
- Updated
- May 15, 2026
- Reserved
- Aug 19, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
Weaknesses
- CWE-121 Stack-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
LeapFTPLeapWare |
|
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/leapftp_list_reply.rbexploit
- https://www.exploit-db.com/exploits/16704exploit
- https://web.archive.org/web/20111016194057/https://www.corelan.be/index.php/2010/10/12/death-of-an-ftp-client/technical-descriptionexploit
- https://web.archive.org/web/20111013232627/http://www.leapware.com/vendor-advisorypatch
- https://www.vulncheck.com/advisories/leapftp-stack-buffer-overflowthird-party-advisory
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