Gs1900 8 Firmware
CVE-2019-15804
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Lifecycle Timeline
1DescriptionNVD
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.
AnalysisAI
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Technical ContextAI
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 products include: Zyxel Gs1900-8 Firmware, Zyxel Gs1900-8Hp Firmware, Zyxel Gs1900-10Hp Firmware, Zyxel Gs1900-16 Firmware, Zyxel Gs1900-24E Firmware. Version information: before 2.50.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
More in Gs1900 8 Firmware
View allAn issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Rated critical severity (CVSS 9.8),
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Rated critical severity (CVSS 9.1),
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Rated high severity (CVSS 8.8), thi
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Rated high severity (CVSS 7.5), thi
An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Rated medium severity (CVSS 5.9), t
Remote code execution in Zyxel GS1900 series managed switches (including GS1900-48HPv2, GS1900-8, GS1900-8HP, GS1900-10H
A vulnerability in the TFTP client of Zyxel GS1900 series firmware, XGS1210 series firmware, and XGS1250 series firmware
A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60 could allow an authenticated local u
A post-authentication command injection vulnerability in the CGI program in the Zyxel GS1900-48 switch firmware version
An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for web authe
ZyXEL NWA1100-N, NWA1100-NH, NWA1121-NI, NWA1123-AC, and NWA1123-NI access points; P-660HN-51, P-663HN-51, VMG1312-B10A,
An insufficient entropy vulnerability caused by the improper use of randomness sources with low entropy for RSA key pair
Same technique Information Disclosure
View allShare
External POC / Exploit Code
Leaving vuln.today