CVE-2020-10884

TP-Link Archer A7 tdpServer Use of Hard-coded Cryptographic Key Remote Code Execution Vulnerability

Severity Score

8.8

*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 execute arbitrary code on affected installations of TP-Link Archer A7 Firmware Ver: 190726 AC1750 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the tdpServer service, which listens on UDP port 20002 by default. This issue results from the use of hard-coded encryption key. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-9652.

Esta vulnerabilidad permite a atacantes adyacentes a la red ejecutar código arbitrario sobre las instalaciones afectadas de enrutadores AC1750 TP-Link Archer A7 Versión de Firmware: 190726. No es requerida una autenticación para explotar esta vulnerabilidad. El fallo específico se presenta dentro del servicio tdpServer, que escucha en el puerto UDP 20002 por defecto. Este problema resulta del uso de la clave de cifrado embebida. Un atacante puede aprovechar esto conjunto con otras vulnerabilidades para ejecutar código en el contexto root. Fue ZDI-CAN-9652.

This vulnerability allows network-adjacent attackers execute arbitrary code on affected installations of TP-Link Archer A7 AC1750 routers. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the tdpServer service, which listens on UDP port 20002 by default. This issue results from the use of hard-coded encryption key. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root.

*Credits: Pedro Ribeiro and Radek Domanski of Team Flashback

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

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

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

2020-03-24 CVE Reserved
2020-03-25 CVE Published
2020-04-16 First Exploit
2023-07-29 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-321: Use of Hard-coded Cryptographic Key
CWE-798: Use of Hard-coded Credentials

CAPEC

References (3)

URL	Tag	Source
https://www.zerodayinitiative.com/advisories/ZDI-20-336	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/48331	2020-04-16
http://packetstormsecurity.com/files/157255/TP-Link-Archer-A7-C7-Unauthenticated-LAN-Remote-Code-Execution.html	2024-08-04

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
Tp-link Search vendor "Tp-link"	Ac1750 Firmware Search vendor "Tp-link" for product "Ac1750 Firmware"	190726 Search vendor "Tp-link" for product "Ac1750 Firmware" and version "190726"	-	Affected	in	Tp-link Search vendor "Tp-link"	Ac1750 Search vendor "Tp-link" for product "Ac1750"	-	-	Safe