CVE-2009-5010: G.rodola Pyftpdlib

Medium severity, CVSS 4.3. EPSS: 1.4% chance of exploitation in the next 30 days.

Race condition in the FTPHandler class in ftpserver.py in pyftpdlib before 0.5.1 allows remote attackers to cause a denial of service (daemon outage) by establishing and then immediately closing a TCP connection, leading to the accept function having an unexpected return value of None, a different vulnerability than CVE-2010-3494.

Affected products

• G.rodola Pyftpdlib: up to and including 0.5.0; version 0.1 only; version 0.1.1 only; version 0.2.0 only; version 0.3.0 only; version 0.4.0 only

Published 2010-10-19. Last modified 2026-06-16.