{"cve":"CVE-2010-3494","nvd":{"published":"2010-10-19T20:00:04.330","modified":"2026-06-16T23:22:53.010","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-362"],"references":["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"],"products":["g.rodola:pyftpdlib"],"source":"nvd","synced_at":"2026-10-19T19:57:56.749847046+00:00"},"epss":{"cve":"CVE-2010-3494","score":0.02294,"percentile":0.83257,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-hw4g-fhcp-x5mq","url":"https://osv.dev/vulnerability/GHSA-hw4g-fhcp-x5mq","summary":"Concurrent Execution using Shared Resource with Improper Synchronization in pyftpdlib","modified":"2024-10-21T20:57:52.743631Z","packages":[{"ecosystem":"PyPI","name":"pyftpdlib","purl":"pkg:pypi/pyftpdlib","ranges":["<0.5.2"],"fixed":["0.5.2"]}]},{"id":"PYSEC-2010-11","url":"https://osv.dev/vulnerability/PYSEC-2010-11","summary":"","modified":"2023-11-08T03:56:57.186012Z","packages":[{"ecosystem":"PyPI","name":"pyftpdlib","purl":"pkg:pypi/pyftpdlib","ranges":["<0.5.2"],"fixed":["0.5.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}