GHSA-62xg-239j-vxg7

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GHSA-62xg-239j-vxg7

Summary: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') 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 getpeername function having an ENOTCONN error, a different vulnerability than CVE-2010-3494.

References: https://nvd.nist.gov/vuln/detail/CVE-2009-5011, https://github.com/giampaolo/pyftpdlib, https://github.com/pypa/advisory-database/tree/main/vulns/pyftpdlib/PYSEC-2010-8.yaml, http://code.google.com/p/pyftpdlib/issues/detail?id=100, http://code.google.com/p/pyftpdlib/source/browse/trunk/HISTORY, http://code.google.com/p/pyftpdlib/source/detail?r=543, http://code.google.com/p/pyftpdlib/source/diff?spec=svn543&r=543&format=side&path=/trunk/pyftpdlib/ftpserver.py