CVE-2020-15634

NETGEAR R6700 httpd strtblupgrade Format String Remote Code Execution Vulnerability

Severity Score

6.3

*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 execute arbitrary code on affected installations of NETGEAR R6700 routers with firmware 1.0.4.84_10.0.58. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of string table file uploads. The issue results from the lack of proper validation of a user-supplied string before using it as a format specifier. An attacker can leverage this vulnerability to execute code in the context of the web server. Was ZDI-CAN-9755.

Esta vulnerabilidad permite a atacantes adyacentes a la red ejecutar código arbitrario en las instalaciones afectadas de los enrutadores NETGEAR R6700 con versiones de firmware 1.0.4.84_10.0.58. No es requerida una autenticación para explotar esta vulnerabilidad. El fallo específico se presenta dentro del manejo de cargas de archivos de tablas de cadenas. El problema es debido a la falta de comprobación apropiada de una cadena suministrada por parte del usuario antes de usarla como especificador de formato. Un atacante puede aprovechar esta vulnerabilidad para ejecutar código en el contexto del servidor web. Fue ZDI-CAN-9755.

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6700 routers. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of string table file uploads. The issue results from the lack of proper validation of a user-supplied string before using it as a format specifier. An attacker can leverage this vulnerability to execute code in the context of the web server.

*Credits: d4rkn3ss from VNPT ISC

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Adjacent

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

2020-07-07 CVE Reserved
2020-08-04 CVE Published
2023-09-06 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-134: Use of Externally-Controlled Format String

CAPEC

References (2)

URL	Tag	Source
https://www.zerodayinitiative.com/advisories/ZDI-20-935	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://kb.netgear.com/000062126/Security-Advisory-for-Pre-Authentication-Command-Injection-on-R6700v3-PSV-2020-0189	2020-08-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Netgear Search vendor "Netgear"	R6700 Firmware Search vendor "Netgear" for product "R6700 Firmware"	< 1.0.4.98 Search vendor "Netgear" for product "R6700 Firmware" and version " < 1.0.4.98"	-	Affected	in	Netgear Search vendor "Netgear"	R6700 Search vendor "Netgear" for product "R6700"	v3 Search vendor "Netgear" for product "R6700" and version "v3"	-	Safe