ClingSTUN: The Linux Backdoor That Hides in Your Own NAT Traversal Traffic
A Linux backdoor documented this week does something quietly clever: it borrows the STUN protocol, the very tool your edge devices use to punch through NAT, and turns it into a command channel that never needs an attacker-controlled server. FortiGuard Labs published the details of the malware, dubbed ClingSTUN, on Monday. SecurityWeek covered it the…