{"id":"CVE-2002-0964","aliases":["EUVD-2002-0953","GHSA-p2q4-m99w-xgjx"],"status":"published","title":"Half-Life Server 1.1.1.0 and earlier allows remote attackers to cause a denial of service ...","description":"Half-Life Server 1.1.1.0 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via multiple responses to the initial challenge with different cd_key values, which reaches the player limit and prevents other players from connecting until the original responses have timed out.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-06","score":0.03155,"percentile":0.88022,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"published":"2002-10-04T04:00:00Z","modified":"2026-06-16T21:58:28Z","exploits":[{"source":"exploitdb","id":"EDB-21572","title":"Half-Life Server 1.1/3.1 - New Player Flood Denial of Service","type":"dos","platform":"multiple","date":"2002-06-20","verified":true,"url":"https://www.exploit-db.com/exploits/21572"}],"products":[{"vendor":"valve_software","product":"half-life"},{"vendor":"valve_software","product":"half-life_dedicated_server"}],"references":[{"url":"http://www.iss.net/security_center/static/9412.php","tags":["vdb-entry","x_refsource_XF","x_transferred","Vendor Advisory"]},{"url":"http://www.securityfocus.com/bid/5076","tags":["vdb-entry","x_refsource_BID","x_transferred","Vendor Advisory"]},{"url":"http://archives.neohapsis.com/archives/bugtraq/2002-06/0248.html","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2002-0964"},{"url":"https://github.com/advisories/GHSA-p2q4-m99w-xgjx"}],"sources":{"cve":[{"id":"CVE-2002-0964","description":"Half-Life Server 1.1.1.0 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via multiple responses to the initial challenge with different cd_key values, which reaches the player limit and prevents other players from connecting until the original responses have timed out.","status":"published","published":"2003-04-02T05:00:00Z","modified":"2024-08-08T03:12:15.555Z","updated_at":"2026-11-02T14:33:55.642267Z"}],"euvd":[{"id":"EUVD-2002-0953","description":"Half-Life Server 1.1.1.0 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via multiple responses to the initial challenge with different cd_key values, which reaches the player limit and prevents other players from connecting until the original responses have timed out.","status":"published","published":"2003-04-02T05:00:00Z","modified":"2024-08-08T03:12:15Z","updated_at":"2026-11-03T01:14:58.174731Z"}],"ghsa":[{"id":"GHSA-p2q4-m99w-xgjx","title":"Half-Life Server 1.1.1.0 and earlier allows remote attackers to cause a denial of service ...","description":"Half-Life Server 1.1.1.0 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via multiple responses to the initial challenge with different cd_key values, which reaches the player limit and prevents other players from connecting until the original responses have timed out.","status":"published","published":"2022-04-30T18:20:15Z","modified":"2023-01-30T05:06:01Z","updated_at":"2026-11-02T14:47:24.368617Z"}],"nvd":[{"id":"CVE-2002-0964","description":"Half-Life Server 1.1.1.0 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via multiple responses to the initial challenge with different cd_key values, which reaches the player limit and prevents other players from connecting until the original responses have timed out.","status":"published","published":"2002-10-04T04:00:00Z","modified":"2026-06-16T21:58:28.33Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:42.827505Z"}]}}