PT-2023-5830 · D Link · D-Link Dir-3040

Nicholas Zubrisky + 1 · Published 2023-07-12 · Updated 2025-05-15 · CVE-2023-41223

Positive Technologies (AI Summary)

CVSS v2.0

7.7

High

Base vector

AV:A/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions D-Link DIR-3040 (affected versions not specified)

Description This issue allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-3040 routers. 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, specifically the PSK parameter, before copying it to a fixed-size stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Authentication is required to exploit this vulnerability.

Recommendations As a temporary workaround, consider disabling the SetQuickVPNSettings() function until a patch is available. Restrict access to the prog.cgi binary to minimize the risk of exploitation. Avoid using the PSK parameter in the affected API endpoint until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Stack Overflow

Memory Corruption

Weakness Enumeration

CWE-121

CWE-787

Related Identifiers

BDU:2023-06516

CVE-2023-41223

ZDI-23-1331

Affected Products

D-Link Dir-3040

References · 7

• https://zerodayinitiative.com/advisories/ZDI-23-1331 · Security Note
• https://osv.dev/vulnerability/CVE-2023-41223 · Vendor Advisory
• https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10350 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-41223 · Security Note
• https://bdu.fstec.ru/vul/2023-06516 · Security Note
• https://twitter.com/CVEnew/status/1786822842098851912 · Twitter Post
• https://t.me/cvenotify/122298 · Telegram Post