CVE-2009-5011: PYSEC-2010-8 - Race condition in the FTPHandler class in ftpserver.py in pyftpdlib before 0.5.2 allows remote attackers to cause a denial of service (daemo

CVE-2009-5011 · Severity: medium · CVSS 4 · Published 2010-10-19

Technologies: pyftpdlib (PyPI). Vendors: PyPI.

Executive brief

Race condition in the FTPHandler class in ftpserver.py in pyftpdlib before 0.5.2 allows remote attackers to cause a denial of service (daemon outage) by establishing and then immediately closing a TCP connection, leading to the getpeername function having an ENOTCONN error, a different vulnerability than CVE-2010-3494.

Affected products

PyPI pyftpdlib

Related threats

PYSEC-2010-22 - pyftpdlib before 0.1.1 does not choose a random value for the port associated with the PASV command, which makes it easier for remote attack
PYSEC-2010-21 - FTPServer.py in pyftpdlib before 0.2.0 does not increment the attempted_logins count for a USER command that specifies an invalid username
PYSEC-2010-4 - Multiple directory traversal vulnerabilities in FTPServer.py in pyftpdlib before 0.3.0 allow remote authenticated users to access arbitrary
PYSEC-2010-23 - FTPServer.py in pyftpdlib before 0.2.0 allows remote attackers to cause a denial of service via a long command.
PYSEC-2010-25 - The ftp_PORT function in FTPServer.py in pyftpdlib before 0.2.0 does not prevent TCP connections to privileged ports if the destination IP a