Total vulnerabilities in the database
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. 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 fds_sys_passDebugPasswd_ret(). The firmware contains access control checks that determine if remote users are allowed to access this functionality. The function that performs this check (fds_sys_remoteDebugEnable_ret in libfds.so) always return TRUE with no actual checks performed. The diagnostics menu allows for reading/writing arbitrary registers and various other configuration parameters which are believed to be related to the network interface chips.
| Software | From | Fixed in |
|---|---|---|
| zyxel / gs1900-8_firmware | - | 2.50\(aahh.0\)c0 |
| zyxel / gs1900-8hp_firmware | - | 2.50\(aahi.0\)c0 |
| zyxel / gs1900-10hp_firmware | - | 2.50\(aazi.0\)c0 |
| zyxel / gs1900-16_firmware | - | 2.50\(aahj.0\)c0 |
| zyxel / gs1900-24e_firmware | - | 2.50\(aahk.0\)c0 |
| zyxel / gs1900-24_firmware | - | 2.50\(aahl.0\)c0 |
| zyxel / gs1900-24hp_firmware | - | 2.50\(aahm.0\)c0 |
| zyxel / gs1900-48_firmware | - | 2.50\(aahn.0\)c0 |
| zyxel / gs1900-48hp_firmware | - | 2.50\(aaho.0\)c0 |