CVE-2024-12342 in VN020 F3v(T)
Summary
by MITRE • 12/08/2024
A vulnerability was found in TP-Link VN020 F3v(T) TT_V6.2.1021. It has been rated as critical. This issue affects some unknown processing of the file /control/WANIPConnection of the component Incomplete SOAP Request Handler. The manipulation leads to denial of service. The attack can only be initiated within the local network. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 05/25/2025
The vulnerability identified as CVE-2024-12342 represents a critical security flaw in TP-Link VN020 F3v(T) TT_V6.2.1021 devices that falls under the category of incomplete soap request handling within the WANIPConnection control component. This issue resides in the SOAP request processing mechanism of the device's web interface, specifically within the /control/WANIPConnection endpoint which governs internet protocol connection management. The vulnerability stems from inadequate input validation and processing within the SOAP handler that fails to properly validate or sanitize incoming requests before executing corresponding network operations. This incomplete processing creates a potential denial of service condition where malformed or specially crafted SOAP requests can cause the device to become unresponsive or crash entirely.
The technical implementation of this vulnerability involves the device's SOAP request handler failing to properly validate the structure and content of incoming requests to the WANIPConnection endpoint. When a malformed request is received, the system's incomplete processing logic causes the device to either enter an infinite loop, consume excessive resources, or crash entirely. The vulnerability specifically targets the SOAP message parsing and execution flow within the device's web services framework, where the device fails to properly handle edge cases or malformed input data. This represents a classic example of a resource exhaustion or execution flow control vulnerability that can be exploited through improper input handling. The attack vector requires local network access, meaning that an attacker must already have network proximity to the device, typically within the same subnet or local network segment.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise network connectivity and device availability for legitimate users. When exploited successfully, the denial of service condition can render the entire device inaccessible, preventing users from managing their internet connection settings or accessing network services through the device. This affects network administrators who rely on the device for internet connectivity management and can lead to extended downtime for network services. The vulnerability's critical rating indicates that it can be easily exploited with minimal technical expertise, as evidenced by the public disclosure of exploit code. Network administrators may face challenges in maintaining service availability when devices become unresponsive due to this vulnerability, particularly in environments where multiple TP-Link devices are deployed and managed centrally. The local network requirement for exploitation limits the scope of impact but does not eliminate the risk, as local network access is often more easily obtained than external access in enterprise environments.
Mitigation strategies for this vulnerability should focus on immediate firmware updates from TP-Link to address the incomplete SOAP request handling logic. Network segmentation and access controls should be implemented to limit local network access to administrative functions, particularly restricting access to the device's web interface from untrusted network segments. The implementation of network monitoring and intrusion detection systems can help identify suspicious SOAP request patterns that may indicate exploitation attempts. Device administrators should disable unnecessary web services and interfaces when not actively needed, reducing the attack surface. Regular network audits should verify that devices are running patched firmware versions and that access controls are properly configured. This vulnerability aligns with CWE-20: Improper Input Validation and CWE-400: Uncontrolled Resource Consumption, representing common weaknesses in web application security that can lead to denial of service conditions. The ATT&CK framework categorizes this under T1499.004: Endpoint Denial of Service, as it specifically targets endpoint device availability through resource exhaustion or execution control manipulation. Organizations should also consider implementing network access control lists to restrict access to device management interfaces and establish regular patch management processes to ensure timely remediation of such vulnerabilities.