What is the severity of ZDI-23-1338?

ZDI-23-1338 is considered a critical vulnerability due to its potential for remote code execution.

How do I fix ZDI-23-1338?

To fix ZDI-23-1338, update the firmware of the D-Link DIR-3040 router to the latest version provided by D-Link.

Who is affected by ZDI-23-1338?

ZDI-23-1338 affects installations of D-Link DIR-3040 routers that have not been patched.

Can ZDI-23-1338 be exploited remotely?

Yes, ZDI-23-1338 can be exploited by network-adjacent attackers without authentication.

What component is vulnerable in ZDI-23-1338?

The vulnerability exists within the prog.cgi binary that handles HNAP requests on the D-Link DIR-3040 routers.

Vulnerability/
ZDI-23-1338

high

7.5

7/9/2023

2/2/2025

ZDI-23-1338: D-Link DIR-3040 HTTP Request Processing Referer Stack-Based Buffer Overflow Remote Code Execution Vulnerability

First published: Thu Sep 07 2023(Updated: )

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-3040 routers. Authentication is not 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 size 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-3040 Firmware

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Reference Links

Frequently Asked Questions

What is the severity of ZDI-23-1338?
ZDI-23-1338 is considered a critical vulnerability due to its potential for remote code execution.
How do I fix ZDI-23-1338?
To fix ZDI-23-1338, update the firmware of the D-Link DIR-3040 router to the latest version provided by D-Link.
Who is affected by ZDI-23-1338?
ZDI-23-1338 affects installations of D-Link DIR-3040 routers that have not been patched.
Can ZDI-23-1338 be exploited remotely?
Yes, ZDI-23-1338 can be exploited by network-adjacent attackers without authentication.
What component is vulnerable in ZDI-23-1338?
The vulnerability exists within the prog.cgi binary that handles HNAP requests on the D-Link DIR-3040 routers.

collector/zdi-published
alias/ZDI-CAN-21674
agent/type
agent/first-publish-date
agent/last-modified-date
agent/title
agent/severity
agent/references
agent/event
agent/description
agent/source
agent/tags
collector/zdi-advisory
source/ZDI
alias/ZDI-23-1338
alias/CVE-2023-41230
agent/software-canonical-lookup
agent/software-canonical-lookup-request
agent/softwarecombine
vendor/d-link
canonical/d-link dir-3040 firmware

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Frequently Asked Questions

What is the severity of ZDI-23-1338?
ZDI-23-1338 is considered a critical vulnerability due to its potential for remote code execution.
How do I fix ZDI-23-1338?
To fix ZDI-23-1338, update the firmware of the D-Link DIR-3040 router to the latest version provided by D-Link.
Who is affected by ZDI-23-1338?
ZDI-23-1338 affects installations of D-Link DIR-3040 routers that have not been patched.
Can ZDI-23-1338 be exploited remotely?
Yes, ZDI-23-1338 can be exploited by network-adjacent attackers without authentication.
What component is vulnerable in ZDI-23-1338?
The vulnerability exists within the prog.cgi binary that handles HNAP requests on the D-Link DIR-3040 routers.