CVE-2019-15804

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50AAHH.0C0. By sending a signal to the CLI process, undocumented functionality is triggered. Specifically, a menu can be triggered by sending the SIGQUIT signal to the CLI application e.g., through CTRL+\ via SSH. The access...

CVE-2019-15804

CVE-2019-15804 affects Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. By sending SIGQUIT to the CLI process (e.g., CTRL+\ via SSH), an undocumented menu can be triggered, exposing a "Password recovery for specific user" option. Access control blocks the menu, but it is believed to be r...