CVE-2024-27350 in Fire OS
Summary
by MITRE • 02/26/2024
Amazon Fire OS 7 before 7.6.6.9 and 8 before 8.1.0.3 allows Fire TV applications to establish local ADB (Android Debug Bridge) connections. NOTE: some third parties dispute whether this has security relevance, because an ADB connection is only possible after the (non-default) ADB Debugging option is enabled, and after the initiator of that specific connection attempt has been approved via a full-screen prompt.
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Analysis
by VulDB Data Team • 11/12/2024
The vulnerability identified as CVE-2024-27350 represents a potential security concern within Amazon Fire OS versions prior to specific patch releases. This issue affects both Fire OS 7 versions before 7.6.6.9 and Fire OS 8 versions before 8.1.0.3, creating a pathway for Fire TV applications to establish local ADB connections. The technical nature of this flaw lies in the implicit assumption that applications may be granted elevated privileges to interact with the Android Debug Bridge service without proper authorization mechanisms. This vulnerability operates under the premise that if a Fire TV application can initiate an ADB connection, it may potentially access system-level functionalities that should normally be restricted.
The operational impact of this vulnerability stems from the potential for unauthorized system access through local ADB connections. While the vulnerability requires explicit user action to enable ADB debugging and approve connection attempts, the mere existence of this capability within applications creates a potential attack vector. The security implications become more pronounced when considering that ADB connections can provide access to sensitive system information, file system operations, and potentially allow for privilege escalation. This vulnerability aligns with CWE-284, which addresses improper access control, and represents a specific case of inadequate authorization mechanisms within the Android debugging framework. The potential for exploitation increases when considering that some applications may not properly validate or restrict ADB connection requests, creating opportunities for malicious actors to leverage these connections for unauthorized access.
The disputed security relevance raised by third parties regarding this vulnerability highlights the complexity of assessing true risk in mobile operating systems. The requirement for users to explicitly enable ADB debugging and approve connections creates a significant barrier that must be overcome by potential attackers. However, this does not eliminate the vulnerability entirely, as it could be exploited in environments where users are less security-conscious or in cases where the approval process is bypassed through social engineering or other means. From an ATT&CK framework perspective, this vulnerability relates to T1059.001 (Command and Scripting Interpreter: PowerShell) and T1078.004 (Valid Accounts: Cloud Accounts) through potential privilege escalation scenarios. The vulnerability also intersects with T1566 (Phishing) in contexts where users might be tricked into enabling debugging features or approving connections, and T1003 (OS Credential Dumping) if the ADB connection provides access to authentication mechanisms.
Mitigation strategies for this vulnerability should focus on both user education and system-level controls. Organizations should ensure that Fire OS devices are updated to the patched versions mentioned in the CVE description, specifically Fire OS 7.6.6.9 and Fire OS 8.1.0.3. Users should be educated about the risks associated with enabling ADB debugging and the importance of only approving connections from trusted sources. System administrators should implement policies that restrict application permissions and monitor for unauthorized ADB connections. Additionally, network segmentation and monitoring solutions should be deployed to detect unusual ADB connection patterns that could indicate unauthorized access attempts. The vulnerability demonstrates the importance of maintaining up-to-date firmware and the necessity of understanding the security implications of debugging features in consumer operating systems. Security teams should also consider implementing automated patch management systems to ensure timely deployment of security updates across all Fire TV devices within their environments.