CVE-2022-43648: d-link dir-3040 Heap-based Buffer Overflow

Vulnerability summary

CVE-2022-43648 is a high (CVSS 8.8) Heap-based Buffer Overflow vulnerability in d-link dir-3040. EPSS estimates a 0.91% chance of exploitation in the next 30 days, higher than 59.3% of scored vulnerabilities.

Timeline

1. 29-03-2023
   PublishedVulnerability first disclosed.
2. 12-02-2025
   Last modifiedVulnerability information updated.

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-3040 1.20B03 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the MiniDLNA service. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the MiniDLNA service. Was ZDI-CAN-19910.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().