CVE-2024-24332 in A3300R
Summary
by MITRE • 01/30/2024
TOTOLINK A3300R V17.0.0cu.557_B20221024 was discovered to contain a command injection vulnerability via the url parameter in the setUrlFilterRules function.
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Analysis
by VulDB Data Team • 05/31/2025
The vulnerability identified as CVE-2024-24332 represents a critical command injection flaw within the TOTOLINK A3300R router firmware version V17.0.0cu.557_B20221024. This issue manifests through the setUrlFilterRules function which processes the url parameter without adequate sanitization or validation, creating a pathway for malicious actors to execute arbitrary commands on the affected device. The vulnerability falls under the Common Weakness Enumeration category CWE-77, which specifically addresses command injection flaws that occur when untrusted data is incorporated into system commands without proper validation or escaping mechanisms. The affected router model represents a consumer-grade networking device commonly deployed in residential and small office environments, making it a potentially attractive target for attackers seeking persistent access to network infrastructure.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL parameter that gets directly processed by the setUrlFilterRules function without proper input validation. This allows for the injection of shell commands that can be executed with the privileges of the web server process running on the router. The attack vector is particularly concerning because it leverages the router's web management interface, which is typically accessible to users within the local network. The vulnerability demonstrates a classic lack of proper input sanitization where user-supplied data flows directly into system command execution contexts, enabling attackers to potentially gain unauthorized access to the device's underlying operating system. This type of flaw is categorized under the ATT&CK framework as T1059.001 - Command and Scripting Interpreter: PowerShell, though in this case the implementation uses shell commands rather than PowerShell specifically.
The operational impact of this vulnerability extends beyond simple command execution, as it can enable attackers to establish persistent backdoors, modify network configurations, intercept traffic, or even use the compromised router as a pivot point to attack other devices within the local network. The vulnerability's severity is compounded by the fact that it affects a widely deployed consumer router model, potentially exposing thousands of devices to remote exploitation. Attackers could leverage this vulnerability to create persistent access points within networks, monitor network traffic, or redirect traffic to malicious servers, effectively compromising the entire network infrastructure that relies on the compromised router as its gateway. The potential for lateral movement within networks makes this vulnerability particularly dangerous in enterprise environments where such devices might be present in the network perimeter.
Mitigation strategies for CVE-2024-24332 should prioritize immediate firmware updates from TOTOLINK, as the vendor should have released patches addressing this specific command injection vulnerability. Network administrators should also implement network segmentation to limit the potential impact of exploitation, disable unnecessary services on the affected devices, and monitor network traffic for suspicious command execution patterns. Additional protective measures include implementing web application firewalls that can detect and block malicious command injection attempts, disabling remote management features where possible, and conducting regular vulnerability assessments of network infrastructure to identify similar issues. The vulnerability highlights the importance of input validation and proper sanitization in web applications, particularly those interfacing with system-level operations. Security professionals should also consider implementing intrusion detection systems that can identify anomalous command execution patterns that may indicate exploitation attempts. Organizations should maintain updated inventories of all network devices and ensure timely patch management to prevent exploitation of known vulnerabilities. The incident underscores the critical need for secure coding practices and proper input validation in all network device firmware development processes.