CVE-2021-27245

State: Published
Severity: 8.1 High
Published: Mar 29, 2021
Updated: Aug 3, 2024
Reserved: Feb 16, 2021

Description

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.

Scores

CVSS	Score	Vector	Source
3.0	8.1 High	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H	zdi

Weaknesses

CWE-693 Protection Mechanism Failure

Affected Products

Product	Versions
Archer A7TP-Link	prior to Archer C7(US)_V5_210125 and Archer A7(US)_V5_200220Affected

References

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

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