CVE-2020-11228 in Snapdragon Auto
Summary
by MITRE • 03/17/2021
Part of RPM region was not protected from xblSec itself due to improper policy and leads to unprivileged access in Snapdragon Auto, Snapdragon Compute, Snapdragon Connectivity, Snapdragon Consumer IOT, Snapdragon Industrial IOT, Snapdragon Mobile, Snapdragon Wired Infrastructure and Networking
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Analysis
by VulDB Data Team • 04/02/2021
CVE-2020-11228 represents a critical security vulnerability within Qualcomm Snapdragon chipsets that affects multiple product lines including automotive, mobile, and industrial IoT devices. This vulnerability stems from an improper security policy implementation that fails to adequately protect certain regions of the RPM (Resource Power Manager) subsystem from xblSec (XBL Security) components. The flaw exists at the hardware and firmware level, creating a persistent access vector that allows unprivileged users to exploit security boundaries that should remain protected. The vulnerability specifically targets the security policies governing memory regions within the Snapdragon architecture, where certain areas designated for protected operations remain accessible to unauthorized processes due to flawed policy enforcement mechanisms. This issue impacts a broad range of Qualcomm products including the Snapdragon Auto platform designed for automotive applications, Snapdragon Compute modules for edge computing, Snapdragon Connectivity solutions for networking infrastructure, Consumer IOT devices, Industrial IOT systems, Mobile platforms, and Wired Infrastructure and Networking solutions. The vulnerability operates at the intersection of hardware security and firmware protection mechanisms, creating a pathway for privilege escalation and unauthorized access to sensitive system resources.
The technical implementation of this vulnerability demonstrates a failure in the security policy enforcement system within Qualcomm's Snapdragon architecture. The RPM region, which manages power and resource allocation across the system, contains critical components that should be isolated from xblSec operations to maintain system integrity. However, the improper policy configuration allows xblSec to access memory regions that should remain protected, effectively bypassing the intended security boundaries. This flaw represents a classic case of insufficient access control and privilege separation, where the security model fails to properly enforce the principle of least privilege. The vulnerability can be exploited through malicious code execution that leverages the unprotected RPM regions to gain elevated privileges or access sensitive system information. The underlying cause lies in the design of the security policy enforcement framework, which fails to properly validate access requests from xblSec components against the protected RPM regions. This weakness creates a persistent security gap that remains active throughout the device lifecycle, as the policy enforcement mechanism cannot be easily corrected without firmware updates or hardware modifications.
The operational impact of CVE-2020-11228 extends across multiple domains of Qualcomm's product portfolio, affecting both consumer and enterprise deployments. In automotive applications, this vulnerability could potentially enable unauthorized access to vehicle control systems, compromising safety-critical functions and creating opportunities for cyber attacks on connected vehicles. Mobile device users face risks of privilege escalation attacks that could lead to full system compromise, data theft, and unauthorized access to personal information stored on the device. Industrial IoT deployments are particularly vulnerable as this flaw could enable attackers to gain access to critical infrastructure control systems, potentially leading to operational disruptions or security breaches in manufacturing and industrial environments. The vulnerability's persistence across multiple product lines means that organizations deploying Snapdragon-based solutions across various sectors must consider the widespread implications of this flaw. The unprivileged access granted by this vulnerability allows attackers to potentially bypass security measures that should normally prevent such access, creating opportunities for persistent threats and long-term system compromise. This vulnerability particularly affects systems where security is paramount, such as automotive platforms where system integrity directly impacts human safety, and industrial deployments where operational continuity is critical.
Mitigation strategies for CVE-2020-11228 require a multi-layered approach that addresses both immediate security concerns and long-term architectural improvements. Qualcomm has issued firmware updates to correct the security policy enforcement issues, but organizations must ensure timely deployment of these patches across all affected devices. System administrators should implement additional monitoring and detection mechanisms to identify potential exploitation attempts targeting this vulnerability. The security community recommends implementing runtime protection measures such as memory protection units and enhanced privilege separation controls to limit the impact of such vulnerabilities. Organizations should also consider architectural redesigns that strengthen the security policy enforcement framework to prevent similar issues in future implementations. The vulnerability aligns with CWE-284 (Improper Access Control) and CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization) categories, indicating the need for comprehensive access control mechanisms and proper synchronization protocols. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and persistence mechanisms, as attackers can leverage the unprotected RPM regions to establish long-term access to systems. Regular security assessments and vulnerability scanning should be implemented to identify similar policy enforcement weaknesses in other system components, ensuring comprehensive protection against similar threats that may arise from improper security policy implementations.