ZDI-22-406: TP-Link TL-WR940N httpd ssid1 Stack-based Buffer Overflow Remote Code Execution Vulnerability
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link TL-WR940N routers. Authentication is required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. 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 |
|---|---|---|
| TP-Link WR940N |
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Reference Links
Frequently Asked Questions
What is the severity of ZDI-22-406?
The severity of ZDI-22-406 is critical due to its potential to allow arbitrary code execution.
How do I fix ZDI-22-406?
To fix ZDI-22-406, update the TP-Link TL-WR940N router firmware to the latest version provided by the manufacturer.
Who is affected by ZDI-22-406?
Users of TP-Link TL-WR940N routers are affected by the ZDI-22-406 vulnerability.
What type of attacks can ZDI-22-406 enable?
ZDI-22-406 can enable network-adjacent attackers to execute arbitrary code on vulnerable routers.
Is authentication required to exploit ZDI-22-406?
Yes, authentication is required to exploit the ZDI-22-406 vulnerability.
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