CVE-2024-38270

Severity Score

5.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

An insufficient entropy vulnerability caused by the improper use of a randomness function with low entropy for web authentication tokens generation exists in the Zyxel GS1900-10HP firmware version V2.80(AAZI.0)C0. This vulnerability could allow a LAN-based attacker a slight chance to gain a valid session token if multiple authenticated sessions are alive.

*Credits: N/A

CVSS Scores

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-06-12 CVE Reserved
2024-09-10 CVE Published
2024-09-10 CVE Updated
2025-04-06 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-331: Insufficient Entropy

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-insufficient-entropy-vulnerability-for-web-authentication-tokens-generation-in-gs1900-series-switches-09-10-2024	2024-09-10

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Zyxel Search vendor "Zyxel"		Gs1900-10hp Firmware Search vendor "Zyxel" for product "Gs1900-10hp Firmware"				*		-		Affected
Zyxel Search vendor "Zyxel"		Gs1900-16 Firmware Search vendor "Zyxel" for product "Gs1900-16 Firmware"				*		-		Affected
Zyxel Search vendor "Zyxel"		Gs1900-24 Firmware Search vendor "Zyxel" for product "Gs1900-24 Firmware"				*		-		Affected
Zyxel Search vendor "Zyxel"		Gs1900-24e Firmware Search vendor "Zyxel" for product "Gs1900-24e Firmware"				*		-		Affected
Zyxel Search vendor "Zyxel"		Gs1900-24ep Firmware Search vendor "Zyxel" for product "Gs1900-24ep Firmware"				*		-		Affected
Zyxel Search vendor "Zyxel"		Gs1900-24hpv2 Firmware Search vendor "Zyxel" for product "Gs1900-24hpv2 Firmware"				*		-		Affected
Zyxel Search vendor "Zyxel"		Gs1900-48 Firmware Search vendor "Zyxel" for product "Gs1900-48 Firmware"				*		-		Affected
Zyxel Search vendor "Zyxel"		Gs1900-48hpv2 Firmware Search vendor "Zyxel" for product "Gs1900-48hpv2 Firmware"				*		-		Affected
Zyxel Search vendor "Zyxel"		Gs1900-8 Firmware Search vendor "Zyxel" for product "Gs1900-8 Firmware"				*		-		Affected
Zyxel Search vendor "Zyxel"		Gs1900-8hp Firmware Search vendor "Zyxel" for product "Gs1900-8hp Firmware"				*		-		Affected