CVE-2017-18324 in Snapdragon Mobile
Summary
by MITRE
Cryptographic key material leaked in debug messages - GERAN in snapdragon mobile and snapdragon wear in versions MDM9206, MDM9607, MDM9615, MDM9625, MDM9635M, MDM9645, MDM9650, MDM9655, MSM8909W, SD 210/SD 212/SD 205, SD 410/12, SD 425, SD 427, SD 430, SD 435, SD 450, SD 615/16/SD 415, SD 625, SD 650/52, SD 800, SD 810, SD 820, SD 835, SD 855, SDX24, Snapdragon_High_Med_2016.
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Analysis
by VulDB Data Team • 05/04/2020
This vulnerability represents a critical security flaw in Qualcomm Snapdragon mobile and wearable platforms where cryptographic key material is inadvertently exposed through debug messages. The issue affects a wide range of Qualcomm chipsets including the MDM9206, MDM9607, MDM9615, and numerous other variants across different generations of Snapdragon processors. The vulnerability stems from improper handling of cryptographic operations within the baseband processor, where sensitive key information flows through debug logging mechanisms without adequate sanitization. This exposure occurs during normal operational procedures when the system generates diagnostic output containing cryptographic material that should remain confidential.
The technical implementation of this vulnerability involves the inclusion of cryptographic keys, certificates, and other sensitive material within debug message streams that are not properly filtered or secured. These debug messages are typically intended for development and diagnostic purposes but are not adequately protected against unauthorized access. The flaw manifests when the baseband processor executes cryptographic operations and subsequently logs information that includes key material, potentially exposing secrets used for authentication, encryption, and secure communications. This represents a violation of fundamental security principles and aligns with CWE-200, which addresses exposure of sensitive information to an unauthorized actor, and CWE-312, which covers exposure of sensitive information through data leakages.
The operational impact of this vulnerability is severe and multifaceted. Attackers who gain access to debug logs or can intercept debug message streams can extract cryptographic keys used for device authentication, secure communications, and encryption of sensitive data. This exposure compromises the entire security model of affected devices, potentially enabling man-in-the-middle attacks, unauthorized device access, and decryption of protected communications. The vulnerability affects not only individual user privacy but also enterprise security posture, as the compromised keys could be used to impersonate devices or decrypt sensitive corporate communications. Additionally, the widespread nature of affected chipsets means that millions of devices across various mobile platforms are potentially vulnerable, creating a significant attack surface for threat actors.
Mitigation strategies for this vulnerability require multiple layers of protection and operational controls. Device manufacturers and service providers should implement comprehensive log sanitization procedures that prevent cryptographic material from appearing in debug output streams. System administrators must ensure that debug logging is disabled or properly secured on production devices, and that any debug information is stored in secure environments with appropriate access controls. The implementation of secure coding practices and regular security audits should be mandatory for all firmware development processes. Organizations should also consider deploying network monitoring solutions to detect and prevent unauthorized access to debug information streams. This vulnerability highlights the importance of adhering to security standards such as those outlined in the NIST SP 800-53 security controls and aligns with ATT&CK technique T1059.001 for command and scripting interpreter, where attackers may leverage exposed debug information to gain deeper system access and potentially escalate privileges. Regular firmware updates and patch management procedures should be implemented to address this and similar vulnerabilities in the mobile ecosystem.