Arch Linux Security Advisory ASA-201910-1 ========================================= Severity: Critical Date : 2019-10-02 CVE-ID : CVE-2019-16928 Package : exim Type : arbitrary code execution Remote : Yes Link : https://security.archlinux.org/AVG-1038 Summary ======= The package exim before version 4.92.3-1 is vulnerable to arbitrary code execution. Resolution ========== Upgrade to 4.92.3-1. # pacman -Syu "exim>=4.92.3-1" The problem has been fixed upstream in version 4.92.3. Workaround ========== None. Description =========== It has been discovered that Exim before 4.92.3 is vulnerable to a heap- based buffer overflow in string_vformat (string.c) involving a long EHLO command leading to remote code execution. Impact ====== A remote attacker is able to execute arbitrary code on the affected host by sending a specifically crafted long EHLO command. References ========== https://www.exim.org/static/doc/security/CVE-2019-16928.txt https://bugs.exim.org/show_bug.cgi?id=2449 https://git.exim.org/exim.git/commitdiff/478effbfd9c3cc5a627fc671d4bf94d1367... https://www.openwall.com/lists/oss-security/2019/09/28/1 https://security.archlinux.org/CVE-2019-16928