CVE-2019-17137

NETGEAR AC1200 mini_httpd Poison Null Byte Authentication Bypass Vulnerability

Severity Score

9.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR AC1200 R6220 Firmware version 1.1.0.86 Smart WiFi Router. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of path strings. By inserting a null byte into the path, the user can skip most authentication checks. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-8616.

Esta vulnerabilidad permite a atacantes adyacentes a la red omitir la autenticación en las instalaciones afectadas de Smart WiFi Router de NETGEAR AC1200 R6220 versión de Firmware 1.1.0.86. No es requerida una autenticación para explotar esta vulnerabilidad. El fallo específico se presenta dentro del procesamiento de cadenas de ruta. Mediante la inserción de un byte null en la ruta, el usuario puede omitir la mayoría de las comprobaciones de autenticación. Un atacante puede aprovechar esta vulnerabilidad para omitir la autenticación en el sistema. Fue ZDI-CAN-8616.

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR AC1200 Smart WiFi Router. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the processing of path strings. By inserting a null byte into the path, the user can skip most authentication checks. An attacker can leverage this vulnerability to bypass authentication on the system.

*Credits: Michael Flanders of Trend Micro Zero Day Initiative

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-10-04 CVE Reserved
2019-10-10 CVE Published
2021-01-20 First Exploit
2023-03-07 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-626: Null Byte Interaction Error (Poison Null Byte)

CAPEC

References (2)

URL	Tag	Source
https://www.zerodayinitiative.com/advisories/ZDI-19-866	Third Party Advisory

URL	Date	SRC
https://github.com/vncloudsco/CVE-2019-17137	2021-01-20

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Netgear Search vendor "Netgear"	Ac1200 R6220 Firmware Search vendor "Netgear" for product "Ac1200 R6220 Firmware"	1.1.0.86 Search vendor "Netgear" for product "Ac1200 R6220 Firmware" and version "1.1.0.86"	-	Affected	in	Netgear Search vendor "Netgear"	Ac1200 R6220 Search vendor "Netgear" for product "Ac1200 R6220"	-	-	Safe