Vulnerability Details 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 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 47.4%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
Products affected by CVE-2019-15804
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cpe:2.3:h:zyxel:gs1900-10hp:-
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cpe:2.3:h:zyxel:gs1900-16:-
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cpe:2.3:h:zyxel:gs1900-24:-
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cpe:2.3:h:zyxel:gs1900-24e:-
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cpe:2.3:h:zyxel:gs1900-24hp:-
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cpe:2.3:h:zyxel:gs1900-48:-
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cpe:2.3:h:zyxel:gs1900-48hp:-
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cpe:2.3:h:zyxel:gs1900-8:-
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cpe:2.3:h:zyxel:gs1900-8hp:-
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cpe:2.3:o:zyxel:gs1900-10hp_firmware:-
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cpe:2.3:o:zyxel:gs1900-10hp_firmware:2.40
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cpe:2.3:o:zyxel:gs1900-16_firmware:-
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cpe:2.3:o:zyxel:gs1900-16_firmware:2.40
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cpe:2.3:o:zyxel:gs1900-24_firmware:-
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cpe:2.3:o:zyxel:gs1900-24_firmware:2.40
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cpe:2.3:o:zyxel:gs1900-24e_firmware:-
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cpe:2.3:o:zyxel:gs1900-24e_firmware:2.40
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cpe:2.3:o:zyxel:gs1900-24hp_firmware:-
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cpe:2.3:o:zyxel:gs1900-24hp_firmware:2.40
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cpe:2.3:o:zyxel:gs1900-48_firmware:-
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cpe:2.3:o:zyxel:gs1900-48_firmware:2.40
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cpe:2.3:o:zyxel:gs1900-48hp_firmware:-
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cpe:2.3:o:zyxel:gs1900-48hp_firmware:2.40
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cpe:2.3:o:zyxel:gs1900-8_firmware:-
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cpe:2.3:o:zyxel:gs1900-8_firmware:2.40
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cpe:2.3:o:zyxel:gs1900-8hp_firmware:-
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cpe:2.3:o:zyxel:gs1900-8hp_firmware:2.40