ZDI-CAN-21591: ZDI-24-034: D-Link DIR-X3260 prog.cgi SetQuickVPNSettings Password Stack-Based Buffer Overflow Remote Code Execution Vulnerability
First published: Thu Jan 11 2024(Updated: )
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-X3260 routers. Authentication is required to exploit this vulnerability. The specific flaw exists within the prog.cgi binary, 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 a user-supplied string before 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-X3260 |
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Reference Links
Frequently Asked Questions
What is the severity of ZDI-CAN-21591?
ZDI-CAN-21591 is considered a high severity vulnerability due to its potential to allow arbitrary code execution by authenticated attackers.
How do I fix ZDI-CAN-21591?
To fix ZDI-CAN-21591, update your D-Link DIR-X3260 router to the latest firmware version provided by D-Link.
Who is affected by ZDI-CAN-21591?
ZDI-CAN-21591 affects users of D-Link DIR-X3260 routers that have not applied the necessary security updates.
What type of attack does ZDI-CAN-21591 involve?
ZDI-CAN-21591 involves authenticated network-adjacent attackers exploiting a flaw in the prog.cgi binary to execute arbitrary code.
Is authentication required to exploit ZDI-CAN-21591?
Yes, exploitation of ZDI-CAN-21591 requires authentication on the affected D-Link DIR-X3260 router.
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