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CVE-2019-15799

Published: Nov 14, 2019Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-269
NVD MITRE
8.8CVSSHIGH
EPSS Score
2.3%
Top 18.9%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. User accounts created through the web interface of the device, when given non-admin level privileges, have the same level of privileged access as administrators when connecting to the device via SSH (while their permissions via the web interface are in fact restricted). This allows normal users to obtain the administrative password by running the tech-support command via the CLI: this contains the encrypted passwords for all users on the device. As these passwords are encrypted using well-known and static parameters, they can be decrypted and the original passwords (including the administrator password) can be obtained.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-269

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 →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html
jasper.la
https://vimeo.com/354726424
vimeo.com
https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml
zyxel.com
and 3 more references View all →

Timeline

Published
Nov 14, 2019
Last Updated
Nov 21, 2024

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