CVE-2010-20121

KRITISCH 9.8CVE-2010-20121 · Published 21/08/2025 · updated 16/06/2026

Package	Affected versions	Patched versions
easyftp server easyftp_server_project	`< 1.7.0.12`	`1.7.0.12`

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.”

References

paulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite · Exploit
raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/easyftp_cwd_fixret.rb · Exploit
seclists.org/bugtraq/2010/Feb/202 · Exploit
exploit-db.com/exploits/11668 · Exploit
exploit-db.com/exploits/12312 · Exploit
exploit-db.com/exploits/14402 · Exploit
exploit-db.com/exploits/16737 · Exploit
vulncheck.com/advisories/easyftp-server-cwd-command-stack-buffer-overflow · Third Party Advisory

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