CVE-2023-27333 TP-Link Archer AX21 tmpServer Command 0x422 Stack-based Buffer Overflow Remote Code Execution Vulnerability

Medium 6.8 Published 3 May 2024 Updated 18 Sep 2024

Network-adjacent authenticated attackers can execute arbitrary code as root via a stack-based buffer overflow in the tmpServer service.

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

What is CVE-2023-27333?

CVE-2023-27333 is a medium-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 tmpServer Command 0x422 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 required to exploit this vulnerability.

The specific flaw exists within the handling of command 0x422 provided to the tmpServer service. 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-19905.

Weakness: CWE-121

Which versions are affected by CVE-2023-27333?

It affects 1 product.

Products include Tp-Link Archer Ax21 Firmware.

How do I fix CVE-2023-27333?

No fix has been published for CVE-2023-27333 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-2023-27333 being exploited?

There is no known exploitation of CVE-2023-27333 in the wild and no public exploit code.

Sources

Also known as GHSA-r8gh-qf5p-8r62.