CVE-2021-34829 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 buffer overflow in the HNAP_AUTH 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-2021-34829?

CVE-2021-34829 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 HNAP_AUTH 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 buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-12065.

Weakness: CWE-120

Which versions are affected by CVE-2021-34829?

It affects 1 product.

Products include Dlink Dap-1330 Firmware.

How do I fix CVE-2021-34829?

No fix has been published for CVE-2021-34829 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-2021-34829 being exploited?

There is no known exploitation of CVE-2021-34829 in the wild and no public exploit code.

Sources

Also known as GHSA-jxg4-v6fp-mf72.