{"id":"CVE-2005-2534","aliases":["DEBIAN-CVE-2005-2534","DSA-851-1","EUVD-2005-2535","GHSA-gj66-3prg-44gq"],"status":"published","title":"Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote...","description":"Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.","severity":{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00967,"percentile":0.62029,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2005-08-24T04:00:00Z","modified":"2026-10-23T03:47:29Z","fixes":[{"ecosystem":"Debian:12","package":"openvpn","fixed_in":["2.0.2-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"openvpn","fixed_in":["2.0.2-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"openvpn","fixed_in":["2.0.2-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.2-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.2-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.2-1"}]}]},{"source":"osv","ecosystem":"Debian:3.1","package":"openvpn","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0-1sarge1"}]}],"versions":["2.0-1"],"bundled":4}],"products":[{"vendor":"openvpn","product":"openvpn"}],"references":[{"url":"http://secunia.com/advisories/17103","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://openvpn.net/changelog.html","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/14610","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"http://www.mandriva.com/security/advisories?name=MDKSA-2005:145","tags":["vendor-advisory","x_refsource_MANDRIVA","x_transferred","Patch","Vendor Advisory","advisory","fix"]},{"url":"http://www.debian.org/security/2005/dsa-851","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"http://secunia.com/advisories/16463","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2005-2534"},{"url":"https://github.com/advisories/GHSA-gj66-3prg-44gq"},{"url":"https://security-tracker.debian.org/tracker/CVE-2005-2534","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2005-2534","description":"Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.","status":"published","published":"2005-08-24T04:00:00Z","modified":"2024-08-07T22:30:01.604Z","updated_at":"2026-11-02T14:33:37.840038Z"}],"euvd":[{"id":"EUVD-2005-2535","description":"Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.","status":"published","published":"2005-08-24T04:00:00Z","modified":"2024-08-07T22:30:01Z","updated_at":"2026-11-03T01:15:30.566873Z"}],"ghsa":[{"id":"GHSA-gj66-3prg-44gq","title":"Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote...","description":"Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.","status":"published","published":"2022-05-01T02:09:07Z","modified":"2023-01-30T05:07:49Z","updated_at":"2026-11-02T14:47:45.889583Z"}],"nvd":[{"id":"CVE-2005-2534","description":"Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.","status":"published","published":"2005-08-24T04:00:00Z","modified":"2026-06-16T22:15:09.3Z","cvss":[{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:00:56.147496Z"}],"osv":[{"id":"CVE-2005-2534","description":"Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.","status":"published","published":"2005-08-24T04:00:00Z","modified":"2026-04-10T03:38:11.52971Z","updated_at":"2026-11-02T15:43:56.581247Z"},{"id":"DEBIAN-CVE-2005-2534","description":"Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.","status":"published","published":"2005-08-24T04:00:00Z","modified":"2026-10-23T03:47:29.827228385Z","updated_at":"2026-11-02T15:45:22.831407Z"},{"id":"DSA-851-1","title":"openvpn - denial of service","status":"published","published":"2005-10-08T00:00:00Z","modified":"2026-03-09T02:09:39.52284Z","updated_at":"2026-11-02T15:46:18.716547Z"}]}}