{"id":"CVE-2017-16944","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-16944","generatedAt":"2026-10-29T01:50:35.700Z","title":"The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a '.' character…","description":"The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to cause a denial of service (infinite loop and stack exhaustion) via vectors involving BDAT commands and an improper check for a '.' character signifying the end of the content, related to the bdat_getc function.","published":"2017-11-25T17:29:00.000Z","lastModified":"2026-06-17T01:10:11.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-835"],"affected":["exim/exim","debian/debian linux"],"epss":{"score":0.63358,"percentile":0.99203,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.41969,"percentile":0.98672},{"date":"2026-09-22","score":0.6332,"percentile":0.9917}]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2017-11-27","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":43184,"kind":"exploit","title":"Exim 4.89 - 'BDAT' Denial of Service","url":"https://www.exploit-db.com/exploits/43184","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/43184.txt","file":"exploits/multiple/dos/43184.txt","published":"2017-11-27","added":"2017-11-27","updated":"2017-11-27","author":"meh","type":"dos","platform":"multiple","port":null,"verified":true,"codes":["CVE-2017-16944"],"tags":"Denial of Service (DoS)","aliases":null,"applicationUrl":"http://www.exploit-db.comexim-4.89.tar.gz","screenshotUrl":null,"referenceUrl":"https://bugs.exim.org/show_bug.cgi?id=2201"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 63.4%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-22T00:00:00.000Z","detail":{"to":0.6332,"from":0.41969,"percentile":0.9917},"summary":"EPSS moved from 42.0% to 63.3% probability of exploitation in the next thirty days."},{"kind":"epss","label":"EPSS jump","at":"2026-09-21T00:00:00.000Z","detail":{"to":0.41969,"from":0.6332,"percentile":0.98672},"summary":"EPSS moved from 63.3% to 42.0% probability of exploitation in the next thirty days."}],"references":[{"url":"http://openwall.com/lists/oss-security/2017/11/25/1","tags":["Mailing List"],"source":"cve@mitre.org"},{"url":"http://openwall.com/lists/oss-security/2017/11/25/2","tags":["Mailing List"],"source":"cve@mitre.org"},{"url":"http://openwall.com/lists/oss-security/2017/11/25/3","tags":["Mailing List"],"source":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2021/05/04/7","source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id/1039873","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://bugs.exim.org/show_bug.cgi?id=2201","tags":["Exploit","Issue Tracking"],"source":"cve@mitre.org"},{"url":"https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html","tags":["Mailing List"],"source":"cve@mitre.org"},{"url":"https://www.debian.org/security/2017/dsa-4053","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/43184/","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://openwall.com/lists/oss-security/2017/11/25/1","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2017/11/25/2","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://openwall.com/lists/oss-security/2017/11/25/3","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2021/05/04/7","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1039873","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugs.exim.org/show_bug.cgi?id=2201","tags":["Exploit","Issue Tracking"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html","tags":["Mailing List"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2017/dsa-4053","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/43184/","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-16944","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."}