CVE-2021-27245

8.1HIGH

Key Information:

Vendor
Tp-link
Status
Archer A7
Vendor
CVE Published:
29 March 2021

Summary

This vulnerability allows a firewall bypass on affected installations of TP-Link Archer A7 prior to Archer C7(US)_V5_210125 and Archer A7(US)_V5_200220 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-12309.

Affected Version(s)

Archer A7 prior to Archer C7(US)_V5_210125 and Archer A7(US)_V5_200220

References

https://www.zerodayinitiative.com/advisories/ZDI-21-214/
x_refsource_MISC

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Team FLASHBACK: Pedro Ribeiro (@pedrib1337 | [email protected]) + Radek Domanski (@RabbitPro)
.