CVE-2010-20103

A malicious backdoor was embedded in the official ProFTPD 1.3.3c source tarball distributed between November 28 and December 2, 2010. The backdoor implements a hidden FTP command trigger that, when invoked, causes the server to execute arbitrary shell commands with root privileges. This allows remote, unauthenticated attackers to run any OS command on the FTP server host.

• CWE-912

• http://www.proftpd.org/Product
• https://advisories.checkpoint.com/defense/advisories/public/2011/cpai-2010-151.html/Third Party Advisory
• https://github.com/proftpd/proftpdProduct
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/ftp/proftpd_133c_backdoor.rbExploit, Third Party Advisory
• https://web.archive.org/web/20111107212129/http://rsync.proftpd.org/Release Notes
• https://www.exploit-db.com/exploits/15662Exploit, VDB Entry
• https://www.exploit-db.com/exploits/16921Exploit, VDB Entry
• https://www.vulncheck.com/advisories/proftpd-backdoor-command-executionThird Party Advisory
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/ftp/proftpd_133c_backdoor.rbExploit, Third Party Advisory
• https://www.exploit-db.com/exploits/15662Exploit, VDB Entry
• https://www.exploit-db.com/exploits/16921Exploit, VDB Entry

Published

Aug 20, 2025

Last Modified

Jul 15, 2026

Status

Analyzed

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