CVE-2020-27864 Command injection in DAP-1860

High 8.8 Published 11 Feb 2021 Updated 4 Aug 2024

Network-adjacent attackers can execute arbitrary code on D-Link WiFi extenders via the HNAP service without authentication.

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-2020-27864?

CVE-2020-27864 is a high-severity command injection vulnerability in D-Link DAP-1860, published on 11 Feb 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-1860 firmware version 1.04B03 WiFi extenders. Authentication is not required to exploit this vulnerability. The specific flaw exists within the HNAP service, which listens on TCP port 80 by default. When parsing the Authorization request header, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-10880.

Weakness: CWE-77

Which versions are affected by CVE-2020-27864?

It affects 1 product.

Products include Dlink Dap-1860 Firmware.

How do I fix CVE-2020-27864?

No fix has been published for CVE-2020-27864 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2020-27864 being exploited?

There is no known exploitation of CVE-2020-27864 in the wild and no public exploit code.

Sources

Also known as GHSA-mq6x-cgqg-3w3m.