CVE-2024-24321 in DIR-816A2
Summary
by MITRE • 02/08/2024
An issue in Dlink DIR-816A2 v.1.10CNB05 allows a remote attacker to execute arbitrary code via the wizardstep4_ssid_2 parameter in the sub_42DA54 function.
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Analysis
by VulDB Data Team • 03/02/2024
The vulnerability identified as CVE-2024-24321 affects the D-Link DIR-816A2 router model running firmware version 1.10CNB05. This represents a critical remote code execution flaw that enables attackers to gain unauthorized control over the affected device. The vulnerability resides within the web interface handling mechanism of the router's firmware, specifically within the sub_42DA54 function which processes user input parameters. The affected parameter wizardstep4_ssid_2 serves as the attack vector for this vulnerability, allowing malicious input to be processed without proper sanitization or validation.
The technical implementation of this vulnerability demonstrates a classic buffer overflow or injection flaw where the sub_42DA54 function fails to properly validate or sanitize input received through the wizardstep4_ssid_2 parameter. This lack of input validation creates a pathway for attackers to inject malicious code that gets executed within the router's execution context. The vulnerability classification aligns with CWE-79 Improper Neutralization of Input During Web Page Generation, which specifically addresses issues where user-supplied data is not properly sanitized before being processed by web applications. The attack scenario involves an unauthenticated remote attacker who can craft malicious requests containing specially formatted payloads that exploit the input handling function to execute arbitrary commands on the target device.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete device compromise and potential network infiltration. Once successfully exploited, attackers can gain full administrative control over the router, enabling them to modify network configurations, redirect traffic, install malware, or use the device as a pivot point for further attacks within the local network. The remote nature of the exploit means that attackers do not require physical access to the device or network credentials, making this vulnerability particularly dangerous for enterprise and residential networks. This vulnerability also maps to ATT&CK technique T1059.007 Command and Scripting Interpreter: JavaScript, as the exploitation likely involves JavaScript-based payloads that leverage the web interface's processing capabilities.
Mitigation strategies for CVE-2024-24321 should prioritize immediate firmware updates from D-Link, as this is the most effective approach to address the root cause of the vulnerability. Network administrators should implement network segmentation to limit the potential impact of exploitation and monitor for suspicious network traffic patterns that might indicate exploitation attempts. Additionally, implementing web application firewalls and input validation rules can provide additional layers of protection. The vulnerability highlights the importance of proper input validation and sanitization practices in embedded web applications, aligning with security best practices outlined in the OWASP Top Ten and NIST cybersecurity guidelines. Organizations should also consider conducting comprehensive vulnerability assessments of their network infrastructure to identify similar issues in other network devices and firmware components.