// For flags

CVE-2020-10887

TP-Link Archer A7 Protection Mechanism Failure Firewall Bypass Vulnerability

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

This vulnerability allows a firewall bypass 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 IPv6 connections. The issue results from the lack of proper filtering of IPv6 SSH connections. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-9663.

Esta vulnerabilidad permite una omisión del firewall 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 conexiones IPv6. El problema resulta de la falta de un filtrado apropiado de las conexiones IPv6 SSH. Un atacante puede aprovechar esto conjunto con otras vulnerabilidades para ejecutar código en el contexto root. Fue ZDI-CAN-9663.

This vulnerability allows a firewall bypass 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 IPv6 connections. The issue results from the lack of proper filtering of IPv6 SSH connections. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root.

*Credits: F-Secure Labs - Mark Barnes, Toby Drew, Max Van Amerongen, and James Loureiro
CVSS Scores
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
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
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
  • 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-693: Protection Mechanism Failure
CAPEC
References (1)
URL Tag Source
https://www.zerodayinitiative.com/advisories/ZDI-20-338 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