ZDI-21-979: D-Link DAP-2020 webproc var:page 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:page 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-21-979?
ZDI-21-979 has been rated as critical due to its potential for arbitrary code execution by network-adjacent attackers.
How do I fix ZDI-21-979?
To fix ZDI-21-979, users should update their D-Link DAP-2020 routers to the latest firmware version provided by D-Link.
What types of attackers can exploit ZDI-21-979?
ZDI-21-979 can be exploited by network-adjacent attackers without the need for authentication.
Is authentication required to exploit ZDI-21-979?
No, authentication is not required to exploit the ZDI-21-979 vulnerability.
What devices are affected by ZDI-21-979?
The D-Link DAP-2020 router is affected by the ZDI-21-979 vulnerability.
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