CVE-2017-16944

HIGH

Exim 4.88-4.89 - DoS

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 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.

Exploits (1)

exploitdb WORKING POC VERIFIED

by meh · textdosmultiple

https://www.exploit-db.com/exploits/43184

View Code ZIP pw:eip

References (9)

[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/1039873

[Exploit, Issue Tracking] https://bugs.exim.org/show_bug.cgi?id=2201

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

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

[Third Party Advisory, VDB Entry] https://www.exploit-db.com/exploits/43184/

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

Scores

CVSS v3 7.5

EPSS 0.7603

EPSS Percentile 98.9%

Attack Vector NETWORK

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

Details

CWE

CWE-835

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