Arch Linux Security Advisory ASA-201802-6 ========================================= Severity: High Date : 2018-02-12 CVE-ID : CVE-2018-6789 Package : exim Type : arbitrary code execution Remote : Yes Link : https://security.archlinux.org/AVG-608 Summary ======= The package exim before version 4.90.1-1 is vulnerable to arbitrary code execution. Resolution ========== Upgrade to 4.90.1-1. # pacman -Syu "exim>=4.90.1-1" The problem has been fixed upstream in version 4.90.1. Workaround ========== None. Description =========== An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely. Impact ====== A remote attacker is able to execute arbitrary code on the affected host by sending a crafted message. References ========== http://exim.org/static/doc/security/CVE-2018-6789.txt https://marc.info/?l=oss-security&m=151828631632609 https://security.archlinux.org/CVE-2018-6789