CVE-2021-35973

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

NETGEAR WAC104 devices before 1.0.4.15 are affected by an authentication bypass vulnerability in /usr/sbin/mini_httpd, allowing an unauthenticated attacker to invoke any action by adding the &currentsetting.htm substring to the HTTP query, a related issue to CVE-2020-27866. This directly allows the attacker to change the web UI password, and eventually to enable debug mode (telnetd) and gain a shell on the device as the admin limited-user account (however, escalation to root is simple because of weak permissions on the /etc/ directory).

Los dispositivos NETGEAR WAC104 versiones anteriores a 1.0.4.15 están afectados por una vulnerabilidad de omisión de autenticación en /usr/sbin/mini_httpd, que permite a un atacante no autenticado invocar cualquier acción añadiendo la subcadena &currentsetting.htm a la consulta HTTP, un problema relacionado con CVE-2020-27866. Esto permite directamente al atacante cambiar la contraseña de la interfaz web, y eventualmente habilitar el modo de depuración (telnetd) y obtener un shell en el dispositivo como la cuenta de usuario limitado admin (sin embargo, la escalada a root es sencilla debido a los permisos débiles en el directorio /etc/)

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-06-30 CVE Reserved
2021-06-30 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-11-02 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-697: Incorrect Comparison

CAPEC

References (2)

URL	Tag	Source

URL	Date	SRC
https://gynvael.coldwind.pl/?lang=en&id=736	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://kb.netgear.com/000063785/Security-Advisory-for-Authentication-Bypass-on-WAC104-PSV-2021-0075	2022-07-12

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Netgear Search vendor "Netgear"	Wac104 Firmware Search vendor "Netgear" for product "Wac104 Firmware"	< 1.0.4.15 Search vendor "Netgear" for product "Wac104 Firmware" and version " < 1.0.4.15"	-	Affected	in	Netgear Search vendor "Netgear"	Wac104 Search vendor "Netgear" for product "Wac104"	-	-	Safe