{"id":"CVE-2010-3494","aliases":["DEBIAN-CVE-2010-3494","EUVD-2010-0015","GHSA-hw4g-fhcp-x5mq","PYSEC-2010-11","UBUNTU-CVE-2010-3494"],"status":"published","title":"Concurrent Execution using Shared Resource with Improper Synchronization in pyftpdlib","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.","severity":{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02294,"percentile":0.83373,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-362"],"published":"2010-10-19T19:00:00Z","modified":"2026-10-23T17:47:28Z","fixes":[{"ecosystem":"PyPI","package":"pyftpdlib","fixed_in":["0.5.2"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"python-pyftpdlib","fixed_in":["0.5.2-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"python-pyftpdlib","fixed_in":["0.5.2-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"python-pyftpdlib","fixed_in":["0.5.2-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"pyftpdlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.2"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"python-pyftpdlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.2-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"python-pyftpdlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.2-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"python-pyftpdlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.2-1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"pyftpdlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.2"}]}],"versions":["0.2.0","0.3.0","0.4.0","0.5.0","0.5.1"]},{"source":"osv","ecosystem":"PyPI","package":"pyftpdlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.5.2"}]}],"versions":["0.2.0","0.3.0","0.4.0","0.5.0","0.5.1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"python-pyftpdlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.0-1","1.4.0-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"python-pyftpdlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.1-4ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"python-pyftpdlib","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.4-1","1.5.4-2build1"]}],"products":[{"vendor":"g.rodola","product":"pyftpdlib"}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2010/09/11/2","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://code.google.com/p/pyftpdlib/source/detail?r=556","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://code.google.com/p/pyftpdlib/source/browse/trunk/HISTORY","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"https://bugs.launchpad.net/zodb/+bug/135108","tags":["x_refsource_MISC","x_transferred","web"]},{"url":"http://code.google.com/p/pyftpdlib/source/diff?spec=svn556\u0026r=556\u0026format=side\u0026path=/trunk/pyftpdlib/ftpserver.py","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://code.google.com/p/pyftpdlib/issues/detail?id=105","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2010/09/24/3","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2010/09/22/3","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://code.google.com/p/pyftpdlib/issues/detail?id=104","tags":["x_refsource_CONFIRM","x_transferred","web","report"]},{"url":"http://bugs.python.org/issue6706","tags":["x_refsource_MISC","x_transferred","Patch","fix","web"]},{"url":"http://www.openwall.com/lists/oss-security/2010/09/09/6","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2010-3494","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-hw4g-fhcp-x5mq","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/pyftpdlib/PYSEC-2010-11.yaml","tags":["web"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2010-3494","tags":["advisory"]},{"url":"https://github.com/giampaolo/pyftpdlib","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2010-3494","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2010-3494","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2010-3494","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.","status":"published","published":"2010-10-19T19:00:00Z","modified":"2024-09-16T20:01:23.055Z","updated_at":"2026-11-02T14:33:27.739358Z"}],"euvd":[{"id":"EUVD-2010-0015","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.","status":"published","published":"2010-10-19T19:00:00Z","modified":"2024-09-16T20:01:23Z","updated_at":"2026-11-03T00:55:18.167658Z"}],"ghsa":[{"id":"GHSA-hw4g-fhcp-x5mq","title":"Concurrent Execution using Shared Resource with Improper Synchronization in pyftpdlib","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.","status":"published","published":"2022-05-17T05:47:39Z","modified":"2024-10-21T20:26:57Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:38:12.325695Z"}],"nvd":[{"id":"CVE-2010-3494","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.","status":"published","published":"2010-10-19T20:00:04.33Z","modified":"2026-06-16T23:22:53.01Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:01:57.065463Z"}],"osv":[{"id":"GHSA-hw4g-fhcp-x5mq","title":"Concurrent Execution using Shared Resource with Improper Synchronization in pyftpdlib","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.","status":"published","published":"2022-05-17T05:47:39Z","modified":"2024-10-21T20:57:52.743631Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:46:49.621585Z"},{"id":"CVE-2010-3494","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.","status":"published","published":"2010-10-19T20:00:04Z","modified":"2026-04-10T03:41:26.060107Z","updated_at":"2026-11-02T15:43:57.991581Z"},{"id":"DEBIAN-CVE-2010-3494","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.","status":"published","published":"2010-10-19T20:00:04.33Z","modified":"2026-10-23T17:47:28.849921029Z","updated_at":"2026-11-02T15:45:24.316685Z"},{"id":"PYSEC-2010-11","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.","status":"published","published":"2010-10-19T20:00:00Z","modified":"2023-11-08T03:56:57.186012Z","updated_at":"2026-11-02T15:52:51.254177Z"},{"id":"UBUNTU-CVE-2010-3494","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.","status":"published","published":"2010-10-19T20:00:00Z","modified":"2025-10-24T04:44:51Z","updated_at":"2026-11-02T15:54:06.395274Z"}]}}