CVE-2017-18170 in Snapdragon Mobile
Summary
by MITRE
Improper input validation in Bluetooth Controller function can lead to possible memory corruption in Snapdragon Mobile in version QCA9379, 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 820, SD 835, SD 845, SD 850, SDM630, SDM636, SDM660, SDM710, Snapdragon_High_Med_2016.
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Analysis
by VulDB Data Team • 05/03/2020
The vulnerability identified as CVE-2017-18170 represents a critical flaw in the Bluetooth controller functionality of various Qualcomm Snapdragon mobile chipsets. This issue stems from inadequate input validation mechanisms within the Bluetooth controller component, creating potential pathways for memory corruption attacks that could compromise the entire device. The affected hardware spans multiple generations of Snapdragon processors including the QCA9379 chip and various SD series processors from SD 205 through SD 850, as well as SDM630, SDM636, SDM660, and SDM710. The vulnerability manifests when the Bluetooth controller processes malformed or unvalidated input data, potentially leading to arbitrary code execution or system instability.
The technical root cause of this vulnerability aligns with CWE-121, which describes buffer overflow conditions where insufficient validation of input data allows attackers to manipulate memory layout and execute malicious code. The flaw occurs within the Bluetooth controller's firmware or driver layer, where input parameters from Bluetooth packets or commands are not properly sanitized before processing. This allows attackers to craft specially crafted Bluetooth packets that, when processed by the vulnerable controller, can overwrite adjacent memory locations or corrupt program execution flow. The memory corruption aspect specifically relates to improper handling of heap or stack memory regions, potentially enabling privilege escalation or denial of service conditions.
From an operational perspective, this vulnerability presents significant security implications for mobile device users and organizations relying on Snapdragon-powered devices. The attack surface extends beyond simple Bluetooth connectivity to encompass potential remote code execution capabilities, particularly when devices are in proximity to malicious actors. Attackers could exploit this vulnerability through Bluetooth-based attacks without requiring physical access or user interaction, making it particularly dangerous for enterprise environments where mobile devices handle sensitive corporate data. The widespread adoption of affected Snapdragon chipsets across various smartphone and tablet manufacturers means that potentially millions of devices could be at risk, with implications for mobile device management, security updates, and overall device integrity.
Mitigation strategies for this vulnerability should encompass both immediate and long-term security measures. Device manufacturers and carriers must prioritize prompt firmware and software updates to address the underlying Bluetooth controller implementation flaws. Network administrators should consider implementing Bluetooth access controls and monitoring for anomalous Bluetooth traffic patterns that might indicate exploitation attempts. The vulnerability also highlights the importance of secure Bluetooth implementation practices and proper input validation at all levels of the communication stack. Organizations should conduct comprehensive vulnerability assessments of their mobile device fleets to identify affected devices and implement appropriate security controls. This includes monitoring for Bluetooth-related security incidents and maintaining updated threat intelligence regarding similar vulnerabilities in wireless communication protocols. The remediation process should follow industry best practices for firmware updates and security patch management while considering the potential impact on device functionality and user experience.