{"schemaVersion":3,"id":"CVE-1999-0393","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Remote attackers can cause a denial of service in Sendmail 8.8.x and 8.9.2 by sending messages with a large number of headers.","dates":{"published":"2000-10-13T04:00:00.000Z","modified":"2024-08-01T16:34:51.979Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5,"severity":"medium","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","computed":false,"selection":"backend-summary"},"metrics":[{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":5,"severity":"medium","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.02427,"percentile":0.83988,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.02427},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.02427,"percentile":0.83988}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.02427,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.02427,"percentile":0.83988}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"23167","name":"Sendmail 8.9.2 - Headers Prescan Denial of Service","source":"exploit-database","url":"https://www.exploit-db.com/exploits/23167","maturity":"poc","reliabilityScore":0.8,"verified":true,"type":"dos","platforms":["irix"],"requiresAuth":null,"exploitdb":{"verified":true,"type":"dos","platform":"irix","file":"exploits/irix/dos/23167.c","codes":["CVE-1999-0393","OSVDB-9310"]},"metasploit":null}],"exploitCount":1,"weaknesses":[],"affected":[{"vendor":"eric_allman","product":"sendmail","name":"sendmail","label":"sendmail","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"8.8","noFixRecorded":false,"fixedIn":null},{"text":"8.9.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"8.8 | 8.9.2","eol":null,"hubHref":"/vendor/eric_allman/sendmail"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://marc.info/?l=bugtraq&m=91694391227372&w=2","label":"marc.info?l=bugtraq&m=91694391227372&w=2","hostname":"marc.info","tags":["Mailing List","X Refsource BUGTRAQ"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2000-10-13T04:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-01T16:34:51.979Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T05:50:12.107Z","stale":false,"partial":false}}