CVE-2021-34860 Path traversal in DAP-2020

Medium 6.5 Published 25 Oct 2021 Updated 4 Aug 2024

Network-adjacent attackers can exploit a path traversal flaw in the webproc endpoint to disclose sensitive information on D-Link DAP-2020 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-2021-34860?

CVE-2021-34860 is a medium-severity path traversal vulnerability in D-Link DAP-2020, published on 25 Oct 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 disclose sensitive information on affected installations of D-Link DAP-2020 1.01rc001 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the getpage parameter provided to the webproc endpoint. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to disclose information in the context of root. Was ZDI-CAN-12103.

Weakness: CWE-22

Which versions are affected by CVE-2021-34860?

It affects 1 product.

Products include Dlink Dap-2020 Firmware.

How do I fix CVE-2021-34860?

No fix has been published for CVE-2021-34860 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2021-34860 being exploited?

There is no known exploitation of CVE-2021-34860 in the wild and no public exploit code.

Sources

Also known as GHSA-2w9j-55xj-gcp3.