CVE-2023-41230: dir-3040 Stack Overflow — Fix

Description

D-Link DIR-3040 HTTP Request Processing Referer 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 not 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-21674.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-121 CWE-121

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
dlink	dir-3040_firmware	< 1.20b03
dlink	dir-3040	All

References

Advisories & Patches

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10350 https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10350

Other References

https://www.zerodayinitiative.com/advisories/ZDI-23-1338/ https://www.zerodayinitiative.com/advisories/ZDI-23-1338/

Frequently Asked Questions

What is CVE-2023-41230? +

D-Link DIR-3040 HTTP Request Processing Referer 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 not 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-21674. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2023-41230? +

CVE-2023-41230 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2023-41230? +

CVE-2023-41230 affects products from dlink, specifically: dir-3040, dir-3040_firmware. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-41230? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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