CVE-2024-31319 in Android
Summary
by MITRE • 07/10/2024
In updateNotificationChannelFromPrivilegedListener of NotificationManagerService.java, there is a possible cross-user data leak due to a confused deputy. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 12/17/2024
The vulnerability identified as CVE-2024-31319 resides within the Android notification system, specifically in the updateNotificationChannelFromPrivilegedListener method of NotificationManagerService.java. This flaw represents a sophisticated cross-user data leak mechanism that exploits a confused deputy scenario, where a privileged system component is manipulated to perform unauthorized actions on behalf of other users. The vulnerability operates at the system level within the Android framework, affecting the core notification management service that handles user notification channels and their configurations.
The technical implementation of this vulnerability stems from inadequate privilege validation and access control mechanisms within the notification channel update process. When a malicious application or attacker attempts to manipulate notification channels, the system's confused deputy problem allows unauthorized access to data belonging to other user profiles. This occurs because the privileged listener component fails to properly verify the identity and authorization context of the requesting entity, enabling a malicious actor to exploit the system's trust relationship and access sensitive notification data from different user accounts. The vulnerability is classified under CWE-284 Access Control, which specifically addresses improper access control mechanisms that allow unauthorized access to resources.
The operational impact of this vulnerability extends beyond simple data leakage, as it enables local privilege escalation without requiring additional execution privileges or user interaction. An attacker can leverage this flaw to gain elevated privileges within the system context, potentially accessing confidential information, modifying notification settings, or performing other malicious activities that would normally be restricted to authorized users. The lack of user interaction requirement makes this vulnerability particularly dangerous as it can be exploited automatically without any user awareness or consent. This capability aligns with ATT&CK technique T1068, which describes local privilege escalation through system-level vulnerabilities.
Mitigation strategies for CVE-2024-31319 should focus on implementing robust access control checks within the notification management service, ensuring that all privileged operations properly validate the requesting entity's identity and authorization level. System updates and patches should enforce stricter context validation mechanisms to prevent the confused deputy scenario from occurring. Additionally, developers should implement proper privilege separation and authentication checks before allowing any notification channel modifications to occur. Organizations should also consider implementing monitoring solutions that can detect anomalous notification service activities and provide alerts when unauthorized access attempts occur. The vulnerability demonstrates the critical importance of maintaining proper access control boundaries within system-level services, particularly those handling user data and privacy-sensitive information.