cve/2017/CVE-2017-16944.md

CVE-2017-16944

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.

POC

Reference

• http://openwall.com/lists/oss-security/2017/11/25/2
• http://openwall.com/lists/oss-security/2017/11/25/3
• http://www.openwall.com/lists/oss-security/2021/05/04/7
• https://bugs.exim.org/show_bug.cgi?id=2201
• https://hackerone.com/reports/296994
• https://www.exploit-db.com/exploits/43184/

Github

• https://github.com/00010111/exim_check
• https://github.com/ARPSyndicate/cvemon
• https://github.com/dbrumley/exim-examples
• https://github.com/lnick2023/nicenice
• https://github.com/qazbnm456/awesome-cve-poc
• https://github.com/xbl3/awesome-cve-poc_qazbnm456