CVE-2017-16943

CRITICAL

Exim <4.90 - Use After Free

Title source: llm

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.

Exploits (1)

nomisec WRITEUP

by beraphin · poc

https://github.com/beraphin/CVE-2017-16943

View Code ZIP pw:eip

References (11)

[Mailing List] http://openwall.com/lists/oss-security/2017/11/25/1

[Mailing List] http://openwall.com/lists/oss-security/2017/11/25/2

[Mailing List] http://openwall.com/lists/oss-security/2017/11/25/3

[Third Party Advisory, VDB Entry] http://www.securitytracker.com/id/1039872

[Exploit, Issue Tracking] https://bugs.exim.org/show_bug.cgi?id=2199

[Patch] https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde

[Patch] https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4

[Exploit] https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944

[Mailing List] https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html

[Third Party Advisory] https://www.debian.org/security/2017/dsa-4053

[Mailing List] http://www.openwall.com/lists/oss-security/2021/05/04/7

Scores

CVSS v3 9.8

EPSS 0.7692

EPSS Percentile 99.0%

Attack Vector NETWORK

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

Details

CWE

CWE-416

Status published

Products (3)

debian/debian_linux 9.0

exim/exim 4.88

exim/exim 4.89

Published Nov 25, 2017

Tracked Since Feb 18, 2026