CVE-2022-43625 Memory corruption in DIR-1935

Medium 6.8 Published 29 Mar 2023 Updated 14 Feb 2025

Network-adjacent attackers can execute arbitrary code as root on D-Link DIR-1935 routers via a stack buffer overflow in the web management portal.

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-2022-43625?

CVE-2022-43625 is a medium-severity memory corruption vulnerability in D-Link DIR-1935, published on 29 Mar 2023. 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 D-Link DIR-1935 1.03 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of SetStaticRouteIPv4Settings requests to the web management portal. When parsing the NetMask element, the process does not properly validate 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-16144.

Weakness: CWE-121

Which versions are affected by CVE-2022-43625?

It affects 1 product.

Products include Dlink Dir-1935 Firmware.

How do I fix CVE-2022-43625?

No fix has been published for CVE-2022-43625 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-2022-43625 being exploited?

There is no known exploitation of CVE-2022-43625 in the wild and no public exploit code.

Sources

Also known as GHSA-3rvm-9j83-445h.