{"id":"CVE-1999-1109","url":"https://www.cyber-defence.io/tools/cve/CVE-1999-1109","generatedAt":"2026-10-27T20:53:21.164Z","title":"Sendmail before 8.10.0 allows remote attackers to cause a denial of service by sending a series of ETRN commands then disconnecting from the server, while Sendmail continues to process the commands after the connection has been terminated.","description":"Sendmail before 8.10.0 allows remote attackers to cause a denial of service by sending a series of ETRN commands then disconnecting from the server, while Sendmail continues to process the commands after the connection has been terminated.","published":"1999-12-22T05:00:00.000Z","lastModified":"2026-06-16T21:49:44.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":5,"severity":"MEDIUM","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P"},"cwe":[],"affected":["sendmail/sendmail"],"epss":{"score":0.07169,"percentile":0.94244,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"1999-12-22","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":19701,"kind":"exploit","title":"Eric Allman Sendmail 8.9.1/8.9.3 - ETRN Denial of Service","url":"https://www.exploit-db.com/exploits/19701","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/dos/19701.sh","file":"exploits/linux/dos/19701.sh","published":"1999-12-22","added":"1999-12-22","updated":"2012-07-09","author":"Michal Zalewski","type":"dos","platform":"linux","port":null,"verified":true,"codes":["CVE-1999-1109","OSVDB-1182"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://www.securityfocus.com/bid/904/info"}]},"verdict":{"level":"high","text":"A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 7.2%. Treat it as high on anything reachable from the internet."},"changes":[],"references":[{"url":"http://marc.info/?l=bugtraq&m=94632241202626&w=2","source":"cve@mitre.org"},{"url":"http://marc.info/?l=bugtraq&m=94780566911948&w=2","source":"cve@mitre.org"},{"url":"http://www.iss.net/security_center/static/7760.php","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/904","source":"cve@mitre.org"},{"url":"http://marc.info/?l=bugtraq&m=94632241202626&w=2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://marc.info/?l=bugtraq&m=94780566911948&w=2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.iss.net/security_center/static/7760.php","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/904","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-1999-1109","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}