CVE-2022-24355 Memory corruption in TL-WR940N

High 8.8 Published 18 Feb 2022 Updated 3 Aug 2024

Network-adjacent attackers can execute arbitrary code with root privileges on TP-Link routers via a stack-based buffer overflow in file name parsing.

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-2022-24355?

CVE-2022-24355 is a high-severity memory corruption vulnerability in TP-Link TL-WR940N, published on 18 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link TL-WR940N 3.20.1 Build 200316 Rel.34392n (5553) routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of file name extensions. 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-13910.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2022-24355?

It affects 1 product.

Products include Tp-Link Tl-Wr940n Firmware.

How do I fix CVE-2022-24355?

No fix has been published for CVE-2022-24355 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-2022-24355 being exploited?

There is no known exploitation of CVE-2022-24355 in the wild and no public exploit code.

Public exploit code: 2 proofs of concept on GitHub.

Sources

Also known as GHSA-qpq6-p42w-r7mg.