CVEvulnerability

CVE-2019-15804

7.5 HIGH Published 2019-11-14 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2019-11-14
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N

Description

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. 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 control check for this menu does work and prohibits accessing the menu, which contains "Password recovery for specific user" options. The menu is believed to be accessible using a serial console.

Affected configurations

• 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)

References