VDB-239154 · CVE-2023-41221 · ZDI-23-1329

D-Link DIR-3040 prog.cgi SetWLanRadioSecurity stack-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in D-Link DIR-3040. It has been declared as critical. This vulnerability affects the function SetWLanRadioSecurity of the file prog.cgi. The manipulation results in stack-based overflow. This vulnerability is cataloged as CVE-2023-41221. The attack must originate from the local network. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in D-Link DIR-3040 (Router Operating System) (version now known). It has been classified as critical. Affected is the function SetWLanRadioSecurity of the file prog.cgi. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

D-Link DIR-3040 prog.cgi SetWLanRadioSecurity 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-size stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-21621.

The weakness was shared 09/07/2023 as ZDI-23-1329. The advisory is available at zerodayinitiative.com. This vulnerability is traded as CVE-2023-41221 since 08/24/2023. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/15/2025).

Upgrading eliminates this vulnerability.

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Productinfo

Type

Router Operating System

Vendor

D-Link

Name

DIR-3040

License

commercial

Website

Vendor: https://www.dlink.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.8
NVD Vector: 🔍

CNA Base Score: 6.8
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/24/2023 🔍
09/07/2023 +14 days 🔍
09/07/2023 +0 days 🔍
05/15/2025 +616 days 🔍

Sourcesinfo

Vendor: dlink.com

Advisory: ZDI-23-1329
Status: Confirmed

CVE: CVE-2023-41221 (🔍)
GCVE (CVE): GCVE-0-2023-41221
GCVE (VulDB): GCVE-100-239154

Entryinfo

Created: 09/07/2023 23:24
Updated: 05/15/2025 15:34
Changes: 09/07/2023 23:24 (40), 05/15/2025 15:34 (37)
Complete: 🔍
Cache ID: 216::103