Several denial of service vulnerabilities exist in Eternal Terminal prior to version 6.2.0, including a DoS triggered remotely by an invalid sequence number and a local bug triggered by invalid input sent directly to the IPC socket.
https://github.com/metaredteam/external-disclosures/security/advisories/GHSA-8cw3-6r98-g7cw
https://github.com/MisterTea/EternalTerminal/releases/tag/et-v6.2.0