CVE-2023-27332 TP-Link Archer AX21 tdpServer Logging Stack-based Buffer Overflow Remote Code Execution Vulnerability

High 8.8 Published 3 May 2024 Updated 18 Sep 2024

Network-adjacent attackers can execute arbitrary code as root on TP-Link Archer AX21 routers via a stack-based buffer overflow in tdpServer.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-27332?

CVE-2023-27332 is a high-severity memory corruption vulnerability in TP-Link Archer AX21, published on 3 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

TP-Link Archer AX21 tdpServer Logging Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer AX21 routers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the logging functionality of the tdpServer program, which listens on UDP port 20002. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-19898.

Weakness: CWE-121

Which versions are affected by CVE-2023-27332?

It affects 1 product.

Products include Tp-Link Archer Ax21 Firmware.

How do I fix CVE-2023-27332?

No fix has been published for CVE-2023-27332 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-27332 being exploited?

There is no known exploitation of CVE-2023-27332 in the wild and no public exploit code.

Sources

Also known as GHSA-wq92-3vm9-wjm7.