CVE-2023-38907 in Smart Bulb Tapo L530
Summary
by MITRE • 09/26/2023
An issue in TPLink Smart bulb Tapo series L530 v.1.0.0 and Tapo Application v.2.8.14 allows a remote attacker to obtain sensitive information via session key in the message function.
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Analysis
by VulDB Data Team • 10/16/2023
The vulnerability identified as CVE-2023-38907 affects TP-Link Smart Bulb Tapo series L530 devices running firmware version 1.0.0 and the associated Tapo application version 2.8.14. This security flaw resides within the message handling functionality of the device's communication protocol, creating a significant exposure for remote attackers who can exploit it to extract sensitive session key information. The vulnerability represents a critical weakness in the device's authentication and encryption mechanisms, potentially allowing unauthorized access to the device's operational parameters and communication channels.
The technical implementation of this vulnerability stems from improper handling of session keys within the message processing functions of the Tapo smart bulb firmware. When the device communicates with the Tapo application or other network entities, it generates and transmits session keys that should remain confidential and protected. However, the flaw allows attackers to intercept and extract these session keys through carefully crafted network messages, effectively compromising the device's security posture. This issue falls under the category of information disclosure vulnerabilities and aligns with CWE-200, which addresses the exposure of sensitive information to an unauthorized actor. The vulnerability demonstrates a lack of proper cryptographic key management and secure communication practices within the device's protocol implementation.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates a pathway for attackers to potentially gain full control over affected smart bulb devices. Once an attacker obtains the session key, they can impersonate legitimate users and devices, enabling them to manipulate lighting configurations, access device settings, and potentially use the compromised device as a pivot point for attacking other networked systems. This vulnerability particularly affects IoT security frameworks where device authentication and secure communication are paramount, as it undermines the fundamental security assumptions of the connected lighting ecosystem. The threat landscape for such vulnerabilities aligns with ATT&CK technique T1566, which covers credential harvesting through social engineering and network-based attacks, and T1071.004, which addresses application layer protocol usage for command and control communications.
Mitigation strategies for CVE-2023-38907 should prioritize immediate firmware updates from TP-Link to address the session key handling flaw. Network administrators should implement additional security controls including network segmentation to isolate IoT devices from critical infrastructure, deployment of intrusion detection systems to monitor for unusual communication patterns, and regular security assessments of connected IoT devices. The vulnerability highlights the importance of secure key management practices and proper implementation of cryptographic protocols in IoT devices, emphasizing the need for comprehensive security testing during the development lifecycle. Organizations should also consider implementing network access controls and monitoring mechanisms to detect and prevent unauthorized access attempts to their smart lighting systems, as this vulnerability represents a significant risk to both personal privacy and enterprise security infrastructure.