// For flags

CVE-2020-15635

NETGEAR R6700 acsd Stack-based Buffer Overflow Remote Code Execution Vulnerability

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*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 V1.0.4.84_10.0.58 routers with firmware 1.0.4.84_10.0.58. Authentication is not required to exploit this vulnerability. The specific flaw exists within the acsd service, which listens on TCP port 5916 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the admin user. Was ZDI-CAN-9853.

Esta vulnerabilidad permite a atacantes adyacentes a la red ejecutar código arbitrario en las instalaciones afectadas de enrutadores NETGEAR R6700 versión V1.0.4.84_10.0.58 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 servicio acsd, que escucha en el puerto TCP 5916 por defecto. El problema resulta de una falta de comprobación apropiada de la longitud de los datos suministrados por parte del usuario antes de copiarlos a un búfer en la región stack de la memoria de longitud fija. Un atacante puede aprovechar esta vulnerabilidad para ejecutar código en el contexto del usuario administrador. Fue ZDI-CAN-9853.

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 acsd service, which listens on TCP port 5916 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the admin user.

*Credits: Pedro Ribeiro (@pedrib1337 | pedrib@gmail.com) and Radek Domanski (@RabbitPro | radek.domanski@gmail.com)
CVSS Scores
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Adjacent
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
  • 2020-07-07 CVE Reserved
  • 2020-08-04 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-11-14 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-121: Stack-based Buffer Overflow
CAPEC
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