CVE-2022-24013 in LinkHub Mesh Wi-Fi MS1G
Summary
by MITRE • 08/06/2022
A buffer overflow vulnerability exists in the GetValue functionality of TCL LinkHub Mesh Wi-Fi MS1G_00_01.00_14. A specially-crafted configuration value can lead to a buffer overflow. An attacker can modify a configuration value to trigger this vulnerability.This vulnerability represents all occurances of the buffer overflow vulnerability within the gpio_ctrl binary.
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Analysis
by VulDB Data Team • 08/31/2022
The CVE-2022-24013 vulnerability represents a critical buffer overflow flaw within the TCL LinkHub Mesh Wi-Fi MS1G_00_01 device firmware, specifically affecting the GetValue functionality of the gpio_ctrl binary component. This vulnerability manifests as a classic stack-based buffer overflow that occurs when processing configuration values, creating a significant security risk for networked devices operating within the targeted mesh Wi-Fi infrastructure. The flaw exists in the device's firmware handling mechanism where insufficient input validation allows maliciously crafted configuration data to exceed allocated buffer boundaries, potentially leading to arbitrary code execution or system compromise. The vulnerability impacts all instances of the buffer overflow within the gpio_ctrl binary, indicating a systemic issue rather than an isolated occurrence, suggesting that multiple attack vectors may exist within the same firmware component.
The technical exploitation of this vulnerability follows established patterns of buffer overflow attacks as defined by CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows data to overwrite adjacent memory locations. The attack vector requires an authenticated attacker who can modify configuration values within the device's management interface, which aligns with ATT&CK technique T1547.001 for hijacking legitimate credentials and T1059.001 for command and scripting interpreter usage. The vulnerability's impact extends beyond simple memory corruption, as the buffer overflow can potentially overwrite return addresses, function pointers, or other critical control data structures within the gpio_ctrl binary's execution context. This creates opportunities for attackers to redirect program execution flow, execute malicious payloads, or achieve privilege escalation within the device's operational environment.
The operational impact of CVE-2022-24013 within mesh Wi-Fi networks presents significant risks to network integrity and security posture. As a mesh router device, the TCL LinkHub operates as both a client and access point within wireless networks, making it a prime target for attackers seeking to establish persistent access or disrupt network operations. The vulnerability's presence in the gpio_ctrl binary suggests potential impacts on hardware control functions, including GPIO pin manipulation and device configuration management, which could result in complete device compromise or denial of service conditions. Network administrators face challenges in identifying and mitigating this vulnerability due to its embedded nature within firmware components, requiring careful firmware updates and potentially complete device replacement. The attack surface expands beyond individual device compromise to include potential lateral movement within mesh networks, as compromised devices can serve as launch points for attacks against other networked systems.
Mitigation strategies for CVE-2022-24013 should prioritize immediate firmware updates from TCL, as this represents the most effective method for addressing the root cause of the buffer overflow vulnerability. Network segmentation and access control measures should be implemented to limit the attack surface, ensuring that only authorized personnel can modify device configuration values. The implementation of input validation controls and bounds checking within the firmware codebase represents a fundamental requirement for preventing similar vulnerabilities in future firmware releases. Security monitoring should focus on detecting anomalous configuration changes or unusual network behavior that might indicate exploitation attempts. Organizations should also consider implementing network intrusion detection systems capable of identifying malicious configuration modifications targeting the gpio_ctrl binary, while maintaining detailed audit logs of all configuration changes to support forensic analysis if compromise occurs. The vulnerability highlights the importance of secure firmware development practices and the need for comprehensive security testing of embedded network devices before deployment in enterprise environments.