What is the severity of ZDI-21-978?

The ZDI-21-978 vulnerability has a high severity rating due to its potential for arbitrary code execution.

How do I fix ZDI-21-978?

To mitigate ZDI-21-978, users should update their D-Link DAP-2020 routers to the latest firmware version provided by D-Link.

Who is affected by ZDI-21-978?

The ZDI-21-978 vulnerability affects installations of D-Link DAP-2020 routers.

Can ZDI-21-978 be exploited remotely?

Yes, ZDI-21-978 can be exploited by network-adjacent attackers without the need for authentication.

What is the nature of the flaw in ZDI-21-978?

The nature of the flaw in ZDI-21-978 involves improper handling of the var:menu parameter, allowing code execution.

Vulnerability/
ZDI-21-978

high

8.8

4/8/2024

ZDI-21-978: D-Link DAP-2020 webproc var:menu Stack-based Buffer Overflow Remote Code Execution Vulnerability

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2020 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the var:menu parameter provided to the webproc endpoint. 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 root.

Affected Software	Affected Version	How to fix
D-Link DAP-2020

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Reference Links

Frequently Asked Questions

What is the severity of ZDI-21-978?
The ZDI-21-978 vulnerability has a high severity rating due to its potential for arbitrary code execution.
How do I fix ZDI-21-978?
To mitigate ZDI-21-978, users should update their D-Link DAP-2020 routers to the latest firmware version provided by D-Link.
Who is affected by ZDI-21-978?
The ZDI-21-978 vulnerability affects installations of D-Link DAP-2020 routers.
Can ZDI-21-978 be exploited remotely?
Yes, ZDI-21-978 can be exploited by network-adjacent attackers without the need for authentication.
What is the nature of the flaw in ZDI-21-978?
The nature of the flaw in ZDI-21-978 involves improper handling of the var:menu parameter, allowing code execution.

agent/references
agent/type
agent/softwarecombine
collector/zdi-advisory
source/ZDI
alias/ZDI-21-978
alias/ZDI-CAN-13270
alias/CVE-2021-34862
agent/software-canonical-lookup
agent/severity
agent/title
agent/tags
agent/event
agent/description
agent/source
vendor/d-link
canonical/d-link dap-2020

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Frequently Asked Questions

What is the severity of ZDI-21-978?
The ZDI-21-978 vulnerability has a high severity rating due to its potential for arbitrary code execution.
How do I fix ZDI-21-978?
To mitigate ZDI-21-978, users should update their D-Link DAP-2020 routers to the latest firmware version provided by D-Link.
Who is affected by ZDI-21-978?
The ZDI-21-978 vulnerability affects installations of D-Link DAP-2020 routers.
Can ZDI-21-978 be exploited remotely?
Yes, ZDI-21-978 can be exploited by network-adjacent attackers without the need for authentication.
What is the nature of the flaw in ZDI-21-978?
The nature of the flaw in ZDI-21-978 involves improper handling of the var:menu parameter, allowing code execution.