D-Link DIR-3040 prog.cgi SetWan3Settings stack-based overflow

Summaryinfo

A vulnerability identified as critical has been detected in D-Link DIR-3040. The affected element is the function SetWan3Settings of the file prog.cgi. Performing a manipulation results in stack-based overflow. This vulnerability is reported as CVE-2023-41218. The attacker must have access to the local network to execute the attack. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in D-Link DIR-3040 (Router Operating System) (affected version not known). This affects the function SetWan3Settings of the file prog.cgi. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

D-Link DIR-3040 prog.cgi SetWan3Settings Stack-Based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-3040 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-size stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-21618.

The weakness was disclosed 09/07/2023 as ZDI-23-1326. The advisory is shared at zerodayinitiative.com. This vulnerability is uniquely identified as CVE-2023-41218 since 08/24/2023. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/15/2025).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-3040

License

• commercial

Website

• Vendor: https://www.dlink.com/

CPE 2.3info

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• 🔍

CPE 2.2info

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Entryinfo

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