CVE-2020-8864 Auth bypass in Multiple Routers

High 8.8 Published 23 Mar 2020 Updated 4 Aug 2024

Network-adjacent attackers can bypass authentication via HNAP login requests to execute arbitrary code on affected D-Link routers.

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-2020-8864?

CVE-2020-8864 is a high-severity authentication bypass vulnerability in D-Link Multiple Routers, published on 23 Mar 2020. 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 bypass authentication on affected installations of D-Link DIR-867, DIR-878, and DIR-882 routers with firmware 1.10B04. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of HNAP login requests. The issue results from the lack of proper handling of empty passwords. An attacker can leverage this vulnerability to execute arbitrary code on the router. Was ZDI-CAN-9471.

Weakness: CWE-697

Which versions are affected by CVE-2020-8864?

It affects 3 products.

Products include Dlink Dir-867 Firmware, Dlink Dir-878 Firmware, Dlink Dir-882 Firmware.

How do I fix CVE-2020-8864?

No fix has been published for CVE-2020-8864 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2020-8864 being exploited?

There is no known exploitation of CVE-2020-8864 in the wild and no public exploit code.

Sources

Also known as GHSA-w7pr-c6mr-6w7j.