CVE-2010-20049

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.

PUBLISHED Reserved 2025-08-19 | Published 2025-08-20 | Updated 2025-08-22 | Assigner VulnCheck

Problem types

CWE-121 Stack-based Buffer Overflow

Product status

Credits

corelanc0d3r of Corelan Team finder

References

raw.githubusercontent.com/...ndows/ftp/leapftp_list_reply.rb exploit

www.exploit-db.com/exploits/16704 exploit

web.archive.org/...ex.php/2010/10/12/death-of-an-ftp-client/ technical-description exploit

web.archive.org/web/20111013232627/http://www.leapware.com/ vendor-advisory patch

www.vulncheck.com/advisories/leapftp-stack-buffer-overflow third-party-advisory

cve.org (CVE-2010-20049)

nvd.nist.gov (CVE-2010-20049)

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