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.

Weakness

The product contains functionality that is not documented, not part of the specification, and not accessible through an interface or command sequence that is obvious to the product’s users or administrators.

Potential Mitigations

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/133.html
• https://cwe.mitre.org/data/definitions/190.html

References

• http://www.proftpd.org/
• https://advisories.checkpoint.com/defense/advisories/public/2011/cpai-2010-151.html/
• https://github.com/proftpd/proftpd
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/ftp/proftpd_133c_backdoor.rb
• https://web.archive.org/web/20111107212129/http://rsync.proftpd.org/
• https://www.exploit-db.com/exploits/15662
• https://www.exploit-db.com/exploits/16921
• https://www.vulncheck.com/advisories/proftpd-backdoor-command-execution
• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/ftp/proftpd_133c_backdoor.rb
• https://www.exploit-db.com/exploits/15662
• https://www.exploit-db.com/exploits/16921