CVE-2010-3494

Advisory

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 accept function having an unexpected value of None for the address, or an ECONNABORTED, EAGAIN, or EWOULDBLOCK error, a related issue to CVE-2010-3492.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

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 accept function having an unexpected value of None for the address, or an ECONNABORTED, EAGAIN, or EWOULDBLOCK error, a related issue to CVE-2010-3492.

Resources

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3494
• http://code.google.com/p/pyftpdlib/source/diff?spec=svn556&r=556&format=side&path=/trunk/pyftpdlib/ftpserver.py
• http://code.google.com/p/pyftpdlib/issues/detail?id=105
• http://code.google.com/p/pyftpdlib/source/detail?r=556
• http://www.openwall.com/lists/oss-security/2010/09/24/3
• https://bugs.launchpad.net/zodb/+bug/135108
• http://bugs.python.org/issue6706
• http://www.openwall.com/lists/oss-security/2010/09/22/3
• http://www.openwall.com/lists/oss-security/2010/09/11/2
• http://www.openwall.com/lists/oss-security/2010/09/09/6
• http://code.google.com/p/pyftpdlib/source/browse/trunk/HISTORY
• http://code.google.com/p/pyftpdlib/issues/detail?id=104