CVE-2024-40656 in Android
Summary
by MITRE • 09/11/2024
In handleCreateConferenceComplete of ConnectionServiceWrapper.java, there is a possible way to reveal images across users due to a confused deputy. This could lead to local information disclosure with no additional execution privileges needed. User interaction is needed for exploitation.
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Analysis
by VulDB Data Team • 12/18/2024
The vulnerability identified as CVE-2024-40656 resides within the ConnectionServiceWrapper.java component of a mobile operating system, specifically manifesting in the handleCreateConferenceComplete method. This flaw represents a confused deputy problem where legitimate system components inadvertently facilitate unauthorized access to sensitive user data. The vulnerability stems from improper authorization checks during conference call establishment processes, allowing malicious actors to exploit the system's trust mechanisms to access image data belonging to other users. The confused deputy vulnerability class falls under CWE-285, which specifically addresses authorization issues where a system component incorrectly delegates authority to an attacker-controlled entity. This particular implementation weakness enables an attacker to manipulate the system's normal operation flow to gain access to cross-user information.
The technical exploitation of this vulnerability requires user interaction, meaning an attacker must first gain access to a target device and convince the user to perform a specific action such as accepting a conference call invitation or initiating a communication session. Once triggered, the vulnerable code path allows for unauthorized data access through the confused deputy mechanism where the system's legitimate communication channels become vectors for information disclosure. The flaw does not require additional execution privileges beyond normal user access, making it particularly dangerous as it can be exploited by any user with basic system permissions. The information disclosure affects image data specifically, suggesting that the vulnerability may involve improper handling of media file access controls or metadata exposure during conference call establishment processes.
From an operational impact perspective, this vulnerability creates a significant privacy risk for users as it allows unauthorized access to personal images stored on the device. The local information disclosure nature means that the attack occurs entirely within the device's local environment without requiring network connectivity or external server compromise. This makes the vulnerability particularly difficult to detect through network monitoring tools and increases the potential for prolonged unauthorized access. The requirement for user interaction suggests that social engineering may play a role in exploitation, potentially involving phishing attacks or deceptive user interface manipulations. Security frameworks like the ATT&CK matrix would categorize this under privilege escalation and credential access tactics, with the vulnerability representing a path to lateral movement through unauthorized data access. The exploitability factor is moderately high due to the user interaction requirement but low in terms of technical complexity, making it a target for both sophisticated and less experienced attackers.
Mitigation strategies for CVE-2024-40656 should focus on strengthening authorization checks within the ConnectionServiceWrapper component and implementing proper access control mechanisms during conference call establishment processes. The system should enforce strict validation of all incoming requests and ensure that legitimate system components cannot be manipulated to access unauthorized data. Updates to the handleCreateConferenceComplete method should include comprehensive permission verification and proper isolation of user data access. Device manufacturers should implement robust input validation and ensure that all communication channels maintain proper authentication and authorization boundaries. Regular security audits of system components should identify similar confused deputy vulnerabilities, particularly in areas involving inter-component communication and user data handling. Users should be educated about the risks of accepting conference calls from unknown sources and the importance of verifying all system prompts before interaction. The fix should also include enhanced logging of suspicious access patterns and implementation of automated detection mechanisms to identify potential exploitation attempts.