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.
References
Link | Resource |
---|---|
https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html | Exploit Third Party Advisory |
https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml | Vendor Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: mitre
Published: 2019-11-14T20:15:46
Updated: 2019-11-14T20:15:46
Reserved: 2019-08-29T00:00:00
Link: CVE-2019-15804
JSON object: View
NVD Information
Status : Analyzed
Published: 2019-11-14T21:15:11.953
Modified: 2020-08-24T17:37:01.140
Link: CVE-2019-15804
JSON object: View
Redhat Information
No data.
CWE