EUVD-2019-6722

Malware in sbrugna...

CVE-2019-15803

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50AAHH.0C0. Through an undocumented sequence of keypresses, undocumented functionality is triggered. A diagnostics shell is triggered via CTRL-ALT-t, which prompts for the password returned by fdssyspassDebugPasswdret. The...

Improper access control

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50AAHH.0C0. Through an undocumented sequence of keypresses, undocumented functionality is triggered. A diagnostics shell is triggered via CTRL-ALT-t, which prompts for the password returned by fdssyspassDebugPasswdret. The...

CVE-2019-15803

The CVE-2019-15803 issue affects Zyxel GS1900 devices running firmware prior to 2.50(AAHH.0)C0. It stems from an undocumented keypress sequence that triggers a diagnostics shell via CTRL-ALT-t. The slider of access checks (fds_sys_remoteDebugEnable_ret in libfds.so) always returns TRUE, bypassing...

CVE-2019-15803

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50AAHH.0C0. Through an undocumented sequence of keypresses, undocumented functionality is triggered. A diagnostics shell is triggered via CTRL-ALT-t, which prompts for the password returned by fdssyspassDebugPasswdret. The...