CVE-2022-24010 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 cwmpd binary.
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Analysis
by VulDB Data Team • 09/03/2022
The CVE-2022-24010 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 cwmpd binary component. This vulnerability exposes the device to potential exploitation through crafted configuration values that can trigger memory corruption. The affected device operates within the consumer and small office networking space, where mesh Wi-Fi systems typically handle configuration management and communication with service providers through the CWMP (Common Wealth Management Protocol) interface. The cwmpd binary serves as the core daemon responsible for processing configuration values and maintaining device state, making it a prime target for attackers seeking to compromise network infrastructure.
The technical implementation of this buffer overflow stems from inadequate input validation within the GetValue function of the cwmpd process. When a malicious actor crafts a specially formatted configuration value and submits it to the device, the system fails to properly bounds-check the incoming data before copying it into a fixed-size buffer. This classic buffer overflow condition allows an attacker to overwrite adjacent memory locations, potentially leading to arbitrary code execution or system instability. The vulnerability manifests specifically in the cwmpd binary where configuration values are processed, indicating that the flaw exists across all instances of buffer overflow conditions within this component rather than being isolated to a single function. The underlying cause aligns with CWE-121, which describes stack-based buffer overflow conditions, and may also relate to CWE-122 for heap-based buffer overflows depending on the exact memory layout.
Operationally, this vulnerability presents significant risks to network security and device integrity within mesh Wi-Fi environments. An attacker who successfully exploits this vulnerability can gain unauthorized access to the device's operational capabilities, potentially enabling them to modify network configurations, redirect traffic, or establish persistent access points within the network infrastructure. The impact extends beyond individual device compromise as mesh networks rely on interconnected devices that share configuration and operational data, making a single compromised device a potential gateway for broader network infiltration. The vulnerability affects devices that are typically deployed in residential and small business environments where network security may be less robust, increasing the likelihood of successful exploitation. Attackers could leverage this vulnerability through remote access points, particularly if the device exposes management interfaces or configuration endpoints to untrusted networks, and the exploitation could occur without requiring physical access to the device.
Mitigation strategies for CVE-2022-24010 should prioritize immediate firmware updates from TCL as the primary remediation approach, as the vendor would have developed patches addressing the buffer overflow conditions within the cwmpd binary. Network administrators should implement network segmentation to limit access to affected devices, particularly restricting management interfaces from untrusted networks and employing firewall rules to prevent unauthorized configuration modifications. Additionally, continuous monitoring of device behavior and network traffic should be implemented to detect potential exploitation attempts through anomalous configuration changes or unexpected network activity. The vulnerability's classification under ATT&CK technique T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation indicates that exploitation could lead to further system compromise and privilege elevation. Organizations should also consider implementing device authentication mechanisms and secure configuration management practices to reduce the attack surface and prevent unauthorized modifications to device settings that could trigger the buffer overflow condition.