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.”
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
| Link | Tags |
|---|---|
| https://seclists.org/bugtraq/2010/Feb/202 | exploit third party advisory |
| https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/easyftp_cwd_fixret.rb | exploit |
| https://paulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite/ | exploit technical description |
| https://www.exploit-db.com/exploits/12312 | exploit |
| https://www.exploit-db.com/exploits/16737 | exploit |
| https://www.exploit-db.com/exploits/11668 | exploit |
| https://www.exploit-db.com/exploits/14402 | exploit |
| https://www.vulncheck.com/advisories/easyftp-server-cwd-command-stack-buffer-overflow | third party advisory |