Remote Yes

Type Arbitrary code execution

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.

AVG-518 exim 4.89-1 4.89.1-1 Critical Fixed FS#56478

30 Nov 2017 ASA-201711-32 AVG-518 exim Critical multiple issues

http://openwall.com/lists/oss-security/2017/11/25/2
https://bugs.exim.org/show_bug.cgi?id=2199
https://git.exim.org/exim.git/commitdiff/4090d62a4b25782129cc1643596dc2f6e8f63bde
https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944
https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html

Workaround available, see https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html