D-Link DIR-3040 120B03 prog.cgi websSecurityHandler memory leak

Summaryinfo

A vulnerability identified as problematic has been detected in D-Link DIR-3040 120B03. The affected element is the function websSecurityHandler of the file prog.cgi. This manipulation causes memory leak. This vulnerability is tracked as CVE-2024-5294. The attack is only possible within the local network. No exploit exists.

Detailsinfo

A vulnerability has been found in D-Link DIR-3040 120B03 and classified as problematic. Affected by this vulnerability is the function websSecurityHandler of the file prog.cgi. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. The summary by CVE is:

D-Link DIR-3040 prog.cgi websSecurityHandler Memory Leak Denial-of-Service Vulnerability. This vulnerability allows network-adjacent attackers to create a denial-of-service condition 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 program, which handles HNAP requests made to the lighttpd webserver listening on ports 80 and 443. The issue results from the lack of proper memory management when processing HTTP cookie values. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. . Was ZDI-CAN-21668.

It is possible to read the advisory at zerodayinitiative.com. This vulnerability is known as CVE-2024-5294 since 05/23/2024. The exploitation appears to be easy. The attack can only be initiated within the local network. The exploitation doesn't need any form of authentication. 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 08/06/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-3040

Version

• 120B03

License

• commercial

Website

• Vendor: https://www.dlink.com/

CPE 2.3info

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CPE 2.2info

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