GHSA-hw4g-fhcp-x5mq

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GHSA-hw4g-fhcp-x5mq

Summary: Concurrent Execution using Shared Resource with Improper Synchronization in pyftpdlib

Details: 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: https://nvd.nist.gov/vuln/detail/CVE-2010-3494, https://bugs.launchpad.net/zodb/+bug/135108, https://github.com/advisories/GHSA-hw4g-fhcp-x5mq, https://github.com/giampaolo/pyftpdlib, https://github.com/pypa/advisory-database/tree/main/vulns/pyftpdlib/PYSEC-2010-11.yaml, http://bugs.python.org/issue6706, http://code.google.com/p/pyftpdlib/issues/detail?id=104, http://code.google.com/p/pyftpdlib/issues/detail?id=105, http://code.google.com/p/pyftpdlib/source/browse/trunk/HISTORY, http://code.google.com/p/pyftpdlib/source/detail?r=556, http://code.google.com/p/pyftpdlib/source/diff?spec=svn556&r=556&format=side&path=/trunk/pyftpdlib/ftpserver.py, http://www.openwall.com/lists/oss-security/2010/09/09/6, http://www.openwall.com/lists/oss-security/2010/09/11/2, http://www.openwall.com/lists/oss-security/2010/09/22/3, http://www.openwall.com/lists/oss-security/2010/09/24/3