Impact Arbitrary local code execution via deep links, CLI --opts, or crafted shortcuts. Affected users: electerm installs that accept protocol URLs or CLI options (affected versions listed in the original report). Exploit requires clicking a crafted electerm://... link or opening a crafted shortcut/command that launches electerm with attacker-controlled opts.

Patches Fixed in version > 3.8.8

Commits:

- https://github.com/electerm/electerm/commit/8a6a17951e96d715f5a231532bbd8303fe208700 - https://github.com/electerm/electerm/commit/a79e06f4a1f0ac6376c3d2411ef4690fa0377742

Workarounds - Disable or unregister electerm protocol handlers (Deep Link settings) and avoid clicking electerm:// links. - Do not run electerm with untrusted --opts arguments or open .lnk / .desktop files from untrusted sources. - Restrict which users can launch electerm on shared machines and avoid leaving electerm installed in locations reachable by other users. - As a temporary measure, run electerm in a confined account or sandbox (non-admin user) to reduce impact.

Resources - Report / credit: https://github.com/Curly-Haired-Baboon - Electerm releases: https://github.com/electerm/electerm/releases

Impact Local code execution without UI interaction: any same-user process can send a JSON payload to electerm's single-instance socket/pipe, causing the app to create tabs and potentially spawn attacker-controlled local processes. Affects electerm single-instance installs on the machine.

Patches

- https://github.com/electerm/electerm/commit/0599e67069b00e376a2e962649aaad6096e63507

Workarounds

- Do not run unsafe command

References - Report / credit: https://github.com/Curly-Haired-Baboon - Electerm releases: https://github.com/electerm/electerm/releases