{"id":"CVE-2017-16943","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-16943","generatedAt":"2026-10-28T21:21:29.942Z","title":"The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands.","description":"The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands.","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":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-416"],"affected":["exim/exim","debian/debian linux"],"epss":{"score":0.47149,"percentile":0.98829,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.43646,"percentile":0.98721},{"date":"2026-09-22","score":0.46705,"percentile":0.98771}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 47.1%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"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/1039872","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://bugs.exim.org/show_bug.cgi?id=2199","tags":["Exploit","Issue Tracking"],"source":"cve@mitre.org"},{"url":"https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde","tags":["Patch"],"source":"cve@mitre.org"},{"url":"https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4","tags":["Patch"],"source":"cve@mitre.org"},{"url":"https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944","tags":["Exploit"],"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":"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/1039872","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugs.exim.org/show_bug.cgi?id=2199","tags":["Exploit","Issue Tracking"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944","tags":["Exploit"],"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"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-16943","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."}