CVE-2020-10881

TP-Link Archer A7 DNS Response Stack-based Buffer Overflow Remote Code Execution Vulnerability

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

This vulnerability allows remote attackers to 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 handling of DNS responses. A crafted DNS message can trigger an overflow of a fixed-length, stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the root user. Was ZDI-CAN-9660.

Esta vulnerabilidad permite a atacantes remotos 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 en el manejo de las respuestas DNS. Un mensaje DNS diseñado puede desencadenar un desbordamiento de un búfer en la región heap de la memoria de longitud fija. Un atacante puede aprovechar esta vulnerabilidad para ejecutar código en el contexto del usuario root. Fue ZDI-CAN-9660.

This vulnerability allows remote attackers to 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 handling of DNS responses. A crafted DNS message can trigger an overflow of a fixed-length, stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the root user.

*Credits: Pedro Ribeiro and Radek Domanski of Team Flashback

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

2020-03-24 CVE Reserved
2020-03-25 CVE Published
2024-04-01 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-121: Stack-based Buffer Overflow
CWE-787: Out-of-bounds Write

CAPEC

References (1)

URL	Tag	Source
https://www.zerodayinitiative.com/advisories/ZDI-20-333	Third Party Advisory

URL	Date	SRC

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