CVE-2022-24028 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 libcommonprod.so binary.
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Analysis
by VulDB Data Team • 08/31/2022
The CVE-2022-24028 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 libcommonprod.so binary. This vulnerability manifests as a classic stack-based buffer overflow that occurs when processing configuration values through the device's management interface. The flaw arises from insufficient input validation and bounds checking within the firmware's configuration handling mechanisms, allowing maliciously crafted input to overwrite adjacent memory locations. The vulnerability is particularly concerning as it affects the core firmware component responsible for device configuration management, making it a prime target for exploitation attempts. The buffer overflow occurs when the device processes user-supplied configuration parameters without adequate sanitization, potentially leading to arbitrary code execution or system instability.
The technical implementation of this vulnerability stems from improper memory management within the libcommonprod.so library, which handles various device configuration operations. When the GetValue function processes input parameters, it fails to validate the length of incoming data against the allocated buffer size, creating a scenario where excessive input can overwrite adjacent memory segments. This flaw aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a direct violation of secure coding practices for memory management. The vulnerability's exploitation requires an attacker to craft specific configuration values that exceed the buffer's allocated capacity, typically through manipulation of device configuration parameters. The device's mesh Wi-Fi architecture further compounds the risk as it allows for potential remote exploitation through network-based configuration modifications, making the attack surface more accessible to threat actors.
The operational impact of CVE-2022-24028 extends beyond simple system instability to encompass potential complete device compromise and network-wide implications. An attacker who successfully exploits this vulnerability could achieve arbitrary code execution on the affected device, potentially gaining root-level access to the mesh Wi-Fi infrastructure. This access could enable attackers to modify network configurations, intercept communications, or establish persistent backdoors within the mesh network. The vulnerability's presence in the libcommonprod.so binary means that multiple configuration operations could be affected, creating a broad attack surface. The mesh networking characteristics of the LinkHub device compound the risk as compromised nodes could be used to propagate attacks throughout the network, potentially affecting all devices within the mesh. From an operational security perspective, this vulnerability represents a significant risk to enterprise and residential networks that rely on mesh Wi-Fi infrastructure for connectivity.
Mitigation strategies for CVE-2022-24028 should prioritize immediate firmware updates from TCL as the primary defense mechanism, as this vulnerability directly affects the device's core firmware components. Network administrators should implement strict access controls and limit configuration modification privileges to authorized personnel only, reducing the attack surface for potential exploitation attempts. The implementation of network segmentation and monitoring protocols can help detect anomalous configuration changes that may indicate exploitation attempts. Security teams should also consider disabling unnecessary configuration interfaces and implementing input validation at network boundaries to prevent malformed configuration data from reaching affected devices. From a compliance standpoint, this vulnerability should be addressed in accordance with industry standards such as NIST SP 800-53 and ISO 27001, particularly focusing on the secure configuration management controls. The ATT&CK framework categorizes this vulnerability under T1059.007 for command and script interpreter execution, and T1566 for malicious file execution, highlighting the potential for post-exploitation activities once the initial vulnerability is successfully exploited. Organizations should also implement regular vulnerability assessments and penetration testing to identify similar buffer overflow vulnerabilities in their mesh networking infrastructure and other embedded systems.