TP-Link TL-WA1201 DNS Response Stack-based Buffer Overflow Remote Code Execution Vulnerability

January 17th, 2022
ZDI-22-081 ZDI-CAN-14656

CVE ID

CVE-2021-35004

CVSS Score

8.8 AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

TP-Link

Affected Products

TL-WA1201

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-Link TL-WA1201 wireless access points. 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 root.

Additional Details

Fixed in version 2


Disclosure Timeline

  • 2021-09-16 - Vulnerability reported to vendor
  • 2022-01-17 - Coordinated public release of advisory

Credit

Team FLASHBACK: Pedro Ribeiro (@pedrib1337 | pedrib@gmail.com) + Radek Domanski (@RabbitPro)

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