ZDI-CAN-21853: (0Day) D-Link DIR-2640 HTTP Referer Stack-Based Buffer Overflow Remote Code Execution Vulnerability
First published: Tue May 14 2024(Updated: )
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-2640-US routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within prog.cgi, which handles HNAP requests made to the lighttpd webserver listening on TCP ports 80 and 443. 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 DIR-2640-US Firmware |
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Reference Links
Frequently Asked Questions
What is the severity of ZDI-CAN-21853?
The severity of ZDI-CAN-21853 is high as it allows network-adjacent attackers to execute arbitrary code without requiring authentication.
How do I fix ZDI-CAN-21853?
To fix ZDI-CAN-21853, ensure that your D-Link DIR-2640-US router firmware is updated to the latest version provided by D-Link.
What vulnerable product is affected by ZDI-CAN-21853?
ZDI-CAN-21853 affects the D-Link DIR-2640-US router and its firmware.
Can ZDI-CAN-21853 be exploited remotely?
Yes, ZDI-CAN-21853 can be exploited by network-adjacent attackers who can access the vulnerable router.
Is authentication required to exploit ZDI-CAN-21853?
No, authentication is not required to exploit ZDI-CAN-21853.
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