CVE-2010-20121

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.”

PUBLISHED Reserved 2025-08-20 | Published 2025-08-21 | Updated 2025-08-22 | Assigner VulnCheck

Problem types

CWE-121 Stack-based Buffer Overflow

Product status

Credits

Paul Makowski finder

References

seclists.org/bugtraq/2010/Feb/202 third-party-advisory exploit

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

paulmakowski.wordpress.com/...ze-w-return-address-overwrite/ technical-description exploit

www.exploit-db.com/exploits/12312 exploit

www.exploit-db.com/exploits/16737 exploit

www.exploit-db.com/exploits/11668 exploit

www.exploit-db.com/exploits/14402 exploit

www.vulncheck.com/...erver-cwd-command-stack-buffer-overflow third-party-advisory

cve.org (CVE-2010-20121)

nvd.nist.gov (CVE-2010-20121)

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