Executive brief
Eugeny Tabby is a popular SSH terminal client. The application sends SSH credentials (username and password) to a server even when the server's host key fails verification, allowing an attacker posing as a legitimate server to intercept login credentials without proper authentication.
Technical details
A credential disclosure vulnerability (CWE-200) in Eugeny Tabby's SSH module causes the application to transmit SSH credentials before completing host key verification. The vulnerability exists in tabby-ssh versions prior to 1.0.214. An attacker can set up a fake SSH server, which triggers the host key verification dialog; if the user proceeds to disconnect after the prompt, the credentials are sent anyway. The network-accessible nature of SSH combined with the lack of proper verification sequencing allows remote credential harvesting. Patch available in version 1.0.214 and later.
Affected products
- Eugeny Tabby before 1.0.214
Timeline
- 2024-09-22: disclosed: Issue reported on GitHub
- 2025-01-17: advisory: GHSA-8vq4-8hfp-29xh published
- 2025-01-16: patched: Fix available in version 1.0.214