CVE-2021-30318 in Snapdragon Auto
Summary
by MITRE • 02/11/2022
Improper validation of input when provisioning the HDCP key can lead to memory corruption in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Voice & Music, Snapdragon Wearables
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Analysis
by VulDB Data Team • 02/16/2022
The vulnerability identified as CVE-2021-30318 represents a critical flaw in the HDCP key provisioning process within Qualcomm's Snapdragon automotive and IoT product lines. This issue stems from inadequate input validation mechanisms that fail to properly sanitize or verify the data provided during the HDCP key generation and installation phases. The vulnerability affects multiple Snapdragon product categories including automotive systems, compute platforms, connectivity solutions, consumer IoT devices, industrial IoT applications, voice and music processing chips, and wearable technology. The improper validation allows malicious actors to inject malformed or unexpected data into the HDCP key provisioning workflow, creating opportunities for memory corruption attacks.
The technical implementation of this vulnerability manifests through the HDCP (High-bandwidth Digital Content Protection) protocol implementation within Qualcomm's hardware security modules. When provisioning HDCP keys, the system fails to validate the integrity and format of input data before processing, leading to potential buffer overflows, heap corruption, or stack corruption issues. This flaw operates at the intersection of hardware security and software validation, where the cryptographic key management system does not adequately check input parameters against expected formats and boundaries. The vulnerability is particularly concerning because HDCP keys are fundamental to digital content protection and secure media transmission, making this a high-value target for attackers seeking to compromise content security or gain unauthorized access to protected systems.
The operational impact of this vulnerability spans across multiple domains of Qualcomm's Snapdragon ecosystem, affecting automotive entertainment and infotainment systems, industrial IoT monitoring and control systems, consumer smart devices, and wearable technology. Attackers could potentially exploit this weakness to execute arbitrary code, escalate privileges, or disrupt normal system operations within devices that rely on HDCP for secure content transmission. The memory corruption resulting from this vulnerability could lead to system crashes, unauthorized access to protected content, or complete system compromise. Given that these Snapdragon products are deployed in critical infrastructure applications, the potential for cascading failures or security breaches extends beyond individual devices to affect larger connected ecosystems.
Mitigation strategies for CVE-2021-30318 should focus on implementing robust input validation mechanisms at every stage of the HDCP key provisioning process. Organizations should deploy firmware updates from Qualcomm that address the specific validation gaps in the HDCP implementation. System administrators should implement monitoring solutions to detect anomalous key provisioning activities and establish network segmentation to limit the attack surface. The vulnerability aligns with CWE-20 Improper Input Validation and follows patterns consistent with ATT&CK technique T1059 Command and Scripting Interpreter, where attackers may leverage memory corruption vulnerabilities to execute malicious code. Additionally, security teams should consider implementing hardware security modules that provide additional layers of protection against such attacks, particularly in automotive and industrial IoT environments where the stakes of system compromise are highest.