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

Summaryinfo

A vulnerability was found in D-Link DIR-3040. It has been rated as critical. This issue affects the function SetSysEmailSettings of the file prog.cgi. This manipulation causes stack-based overflow. This vulnerability is registered as CVE-2023-41220. The attack requires access to the local network. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in D-Link DIR-3040 (Router Operating System) (version unknown). It has been declared as critical. Affected by this vulnerability is the function SetSysEmailSettings of the file prog.cgi. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is 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). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

D-Link DIR-3040 prog.cgi SetSysEmailSettings 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-21620.

The weakness was published 09/07/2023 as ZDI-23-1328. It is possible to read the advisory at zerodayinitiative.com. This vulnerability is known as CVE-2023-41220 since 08/24/2023. Technical details of the vulnerability are known, but there is no available exploit. The pricing 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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