Detections
Analytics

CVE-2017-16943

critical

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.

References

https://www.debian.org/security/2017/dsa-4053

http://www.securitytracker.com/id/1039872

https://thehackernews.com/2026/05/new-exim-bdat-vulnerability-exposes.html

https://github.com/krlabs/eximsmtp-vulnerabilities

https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html

https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4

https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde

http://www.openwall.com/lists/oss-security/2021/05/04/7

http://openwall.com/lists/oss-security/2017/11/25/3

http://openwall.com/lists/oss-security/2017/11/25/2

http://openwall.com/lists/oss-security/2017/11/25/1

Details

Source: Mitre, NVD

Published: 2017-11-25

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.46705