Joe Vennix of Apple security has found another significant vulnerability in sudo utility that under a specific configuration could allow low privileged users or malicious programs to execute arbitrary commands with administrative ('root') privileges on Linux or macOS systems. See https://thehackernews.com/2020/02/sudo-linux-vulnerability.html for details, how to determine if your system(s) is/are vulnerable, and how to fix with a simple configuration change.
The default settings for MacOS and a number of common Linux distributions are such that sudo on those platforms is not vulnerable but the defaults on a few distros are vulnerable, e.g., Mint and Elementary OS. This vulnerability is being tracked as CVE-2019-18634.
