CVE-2021-34830 Memory corruption in DAP-1330

High 8.8 Published 15 Jul 2021 Updated 4 Aug 2024

Network-adjacent attackers can execute arbitrary code on D-Link DAP-1330 routers via a stack-based buffer overflow in Cookie header handling.

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-2021-34830?

CVE-2021-34830 is a high-severity memory corruption vulnerability in D-Link DAP-1330, published on 15 Jul 2021. 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 DAP-1330 1.13B01 BETA routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the Cookie HTTP header. 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 the device. Was ZDI-CAN-12028.

Weakness: CWE-121

Which versions are affected by CVE-2021-34830?

It affects 1 product.

Products include Dlink Dap-1330 Firmware.

How do I fix CVE-2021-34830?

No fix has been published for CVE-2021-34830 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-2021-34830 being exploited?

There is no known exploitation of CVE-2021-34830 in the wild and no public exploit code.

Sources

Also known as GHSA-fq97-4ff2-mrgg.