CVE-2020-9774 in macOS
Summary
by MITRE • 10/28/2020
An issue existed with Siri Suggestions access to encrypted data. The issue was fixed by limiting access to encrypted data. This issue is fixed in macOS Catalina 10.15.3, Security Update 2020-001 Mojave, Security Update 2020-001 High Sierra. Encrypted data may be inappropriately accessed.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 11/29/2020
The vulnerability described in CVE-2020-9774 represents a significant security flaw in Apple's macOS operating system that affected Siri Suggestions functionality and encrypted data access controls. This issue stems from improper access restrictions that allowed unauthorized retrieval of encrypted data through the Siri Suggestions feature, creating a potential pathway for sensitive information disclosure. The vulnerability existed across multiple macOS versions including Mojave and High Sierra, with the fix being implemented in macOS Catalina 10.15.3 and subsequent security updates. The flaw specifically impacted how Siri Suggestions interacted with encrypted data stored on the system, potentially exposing confidential information to unauthorized access.
The technical root cause of this vulnerability involves inadequate access control mechanisms within the macOS security framework that govern how Siri Suggestions can interact with encrypted data. This issue is categorized under CWE-284, which addresses improper access control, and specifically relates to insufficient privileges or access restrictions that allow unauthorized data access. The flaw enabled malicious actors or compromised applications to potentially retrieve encrypted data that should have been protected by the operating system's encryption mechanisms. The vulnerability exploited the way Siri Suggestions processed and accessed data, creating a window where encrypted content could be accessed without proper authorization.
The operational impact of CVE-2020-9774 extends beyond simple data exposure, as it represents a fundamental breach in the system's security model that could enable more sophisticated attacks. Attackers could potentially leverage this vulnerability to access sensitive user data including documents, communications, and personal information stored in encrypted formats. The vulnerability creates a persistent risk for users who rely on macOS encryption features for data protection, as it undermines the core security assumptions of the operating system's encryption implementation. This flaw particularly affects enterprise environments where sensitive data is commonly stored in encrypted formats and where Siri Suggestions might be enabled.
Mitigation strategies for CVE-2020-9774 focus on implementing the official security updates provided by Apple, which include the macOS Catalina 10.15.3 release and Security Update 2020-001 for Mojave and High Sierra. System administrators should prioritize deployment of these updates across all affected systems to eliminate the vulnerability. Additional protective measures include disabling Siri Suggestions when not required, implementing strict access controls for encrypted data, and monitoring for unusual data access patterns that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1070.004, which involves data manipulation through system processes, and represents a critical gap in endpoint protection that requires immediate remediation. Organizations should also consider implementing network monitoring solutions to detect potential exploitation attempts and maintain comprehensive audit logs of encrypted data access patterns.