Bug 646177 (CVE-2010-3494)

Common Vulnerabilities and Exposures assigned an identifier CVE-2010-3494 to
the following vulnerability:

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.

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

Affected versions:
This issue affects the version of the pyftpdlib package, as shipped
with Fedora release of 12.

This issue does NOT affect the version of the pyftpdlib package, as
shipped with Fedora release of 13 (relevant code part is already
updated).