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CVE-2019-15804

Published: Nov 14, 2019Updated: Nov 21, 2024 Sources: CVE List NVD BDUNVD-CWE-noinfo
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.9%
Top 44.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

NVD-CWE-noinfo

Affected Products

gs1900-8 firmwarezyxelNetworking Infrastructure
gs1900-8hp firmwarezyxelNetworking Infrastructure
gs1900-10hp firmwarezyxelNetworking Infrastructure
gs1900-16 firmwarezyxelNetworking Infrastructure
gs1900-24e firmwarezyxelNetworking Infrastructure
zyxelcommercialTWNetworking Infrastructureaka zyxel communications corp.
and 14 more affected products View all →

Exploitability

Official Patch Available

References

https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html
jasper.la
https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml
zyxel.com
https://nvd.nist.gov/vuln/detail/CVE-2019-15804
nvd.nist.gov
and 1 more references View all →

Timeline

Published
Nov 14, 2019
Last Updated
Nov 21, 2024

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