CVE-2017-16944

Published: 27 November 2017

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.

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
exim4
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(4.86.2-2ubuntu2.2)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(4.82-3ubuntu2.3)
Patches:
Upstream: https://git.exim.org/exim.git/commit/178ecb70987f024f0e775d87c2f8b2cf587dd542
Upstream: https://git.exim.org/exim.git/commit/4804c62909a62a3ac12ec4777ebd48c541028965 (4.89)