{"id":"CVE-1999-0867","aliases":["EUVD-1999-0848","GHSA-m9hv-pvv3-2735"],"status":"published","title":"Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.","description":"Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.","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":"2026-11-08","score":0.21525,"percentile":0.97635,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-20"],"published":"1999-08-11T04:00:00Z","modified":"2026-06-16T21:49:13Z","exploits":[{"source":"exploitdb","id":"EDB-19457","title":"Microsoft Commercial Internet System 2.0/2.5 / IIS 4.0 / Site Server Commerce Edition 3.0 alpha/3.0 - Denial of Service","type":"dos","platform":"multiple","date":"1999-08-11","verified":true,"url":"https://www.exploit-db.com/exploits/19457"}],"products":[{"vendor":"microsoft","product":"commercial_internet_system"},{"vendor":"microsoft","product":"internet_information_server"},{"vendor":"microsoft","product":"site_server"}],"references":[{"url":"http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ238349","tags":["vendor-advisory","x_refsource_MSKB","x_transferred"]},{"url":"http://www.ciac.org/ciac/bulletins/j-058.shtml","tags":["third-party-advisory","government-resource","x_refsource_CIAC","x_transferred"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-029","tags":["vendor-advisory","x_refsource_MS","x_transferred"]},{"url":"http://www.securityfocus.com/bid/579","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-1999-0867"},{"url":"http://support.microsoft.com/default.aspx?scid=kb;[LN];Q238349"},{"url":"https://github.com/advisories/GHSA-m9hv-pvv3-2735"}],"sources":{"cve":[{"id":"CVE-1999-0867","description":"Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.","status":"published","published":"2000-01-04T05:00:00Z","modified":"2024-08-01T16:55:27.881Z","updated_at":"2026-11-02T14:33:53.911988Z"}],"euvd":[{"id":"EUVD-1999-0848","description":"Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.","status":"published","published":"2000-01-04T05:00:00Z","modified":"2024-08-01T16:55:27Z","updated_at":"2026-11-03T03:50:45.175548Z"}],"ghsa":[{"id":"GHSA-m9hv-pvv3-2735","title":"Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.","description":"Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.","status":"published","published":"2022-04-30T18:11:21Z","modified":"2025-04-03T03:35:31Z","cwes":["CWE-20"],"updated_at":"2026-11-02T15:00:36.60124Z"}],"nvd":[{"id":"CVE-1999-0867","description":"Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.","status":"published","published":"1999-08-11T04:00:00Z","modified":"2026-06-16T21:49:13.347Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T13:58:40.923898Z"}]}}