CVE-2019-15804

published 2019-11-14

CVE-2019-15804: 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…

Priority P3 42 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C N I H A N

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

9 ranges

Vendor	Product	Version range	Fixed in
zyxel	gs1900-10hp_firmware	< 2.50\(aazi.0\)c0	2.50\(aazi.0\)c0
zyxel	gs1900-16_firmware	< 2.50\(aahj.0\)c0	2.50\(aahj.0\)c0
zyxel	gs1900-24_firmware	< 2.50\(aahl.0\)c0	2.50\(aahl.0\)c0
zyxel	gs1900-24e_firmware	< 2.50\(aahk.0\)c0	2.50\(aahk.0\)c0
zyxel	gs1900-24hp_firmware	< 2.50\(aahm.0\)c0	2.50\(aahm.0\)c0
zyxel	gs1900-48_firmware	< 2.50\(aahn.0\)c0	2.50\(aahn.0\)c0
zyxel	gs1900-48hp_firmware	< 2.50\(aaho.0\)c0	2.50\(aaho.0\)c0
zyxel	gs1900-8_firmware	< 2.50\(aahh.0\)c0	2.50\(aahh.0\)c0
zyxel	gs1900-8hp_firmware	< 2.50\(aahi.0\)c0	2.50\(aahi.0\)c0

CVSS provenance

nvd v3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

nvd v2.0 5.0 MEDIUM AV:N/AC:L/Au:N/C:N/I:P/A:N

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