Vulnerability · Published May 3, 2024 · Assigned by zdi

CVE-2023-41217D-Link DIR-3040 prog.cgi SetQuickVPNSettings Password Stack-Based Buffer Overflow Remote Code Execution Vulnerability

High 7.1

In plain English

A high-severity stack buffer overflow in DIR-3040 from D-Link. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).

Severity (CVSS 3.0)7.1High

Exploit odds (30 days)0.7%top 45.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

D-Link DIR-3040 prog.cgi SetQuickVPNSettings Password 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-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-21617.

Affected products (as reported)

Vendor	Product	Versions
D-Link	DIR-3040	120B03

Weakness: CWE-121 · Vector: CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

ZDI-23-1325 x_research-advisory
vendor-provided URL vendor-advisory