National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-15804 Detail

Current 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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 7.5 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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Hyperlink 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

Weakness Enumeration

CWE-ID CWE Name Source
CWE-20 Improper Input Validation NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:o:zyxel:gs1900-8_firmware:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.50\(aahh.0\)c0
Running on/with
 cpe:2.3:h:zyxel:gs1900-8:-:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 2 ( hide )
 cpe:2.3:o:zyxel:gs1900-8hp_firmware:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.50\(aahi.0\)c0
Running on/with
 cpe:2.3:h:zyxel:gs1900-8hp:-:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 3 ( hide )
 cpe:2.3:o:zyxel:gs1900-10hp_firmware:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.50\(aazi.0\)c0
Running on/with
 cpe:2.3:h:zyxel:gs1900-10hp:-:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 4 ( hide )
 cpe:2.3:o:zyxel:gs1900-16_firmware:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.50\(aahj.0\)c0
Running on/with
 cpe:2.3:h:zyxel:gs1900-16:-:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 5 ( hide )
 cpe:2.3:o:zyxel:gs1900-24e_firmware:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.50\(aahk.0\)c0
Running on/with
 cpe:2.3:h:zyxel:gs1900-24e:-:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 6 ( hide )
 cpe:2.3:o:zyxel:gs1900-24_firmware:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.50\(aahl.0\)c0
Running on/with
 cpe:2.3:h:zyxel:gs1900-24:-:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 7 ( hide )
 cpe:2.3:o:zyxel:gs1900-24hp_firmware:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.50\(aahm.0\)c0
Running on/with
 cpe:2.3:h:zyxel:gs1900-24hp:-:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 8 ( hide )
 cpe:2.3:o:zyxel:gs1900-48_firmware:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.50\(aahn.0\)c0
Running on/with
 cpe:2.3:h:zyxel:gs1900-48:-:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 9 ( hide )
 cpe:2.3:o:zyxel:gs1900-48hp_firmware:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
2.50\(aaho.0\)c0
Running on/with
 cpe:2.3:h:zyxel:gs1900-48hp:-:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

1 change record found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-15804
NVD Published Date:
11/14/2019
NVD Last Modified:
11/21/2019