CVE-2024-47029 in Android
Summary
by MITRE • 10/25/2024
In TrustySharedMemoryManager::GetSharedMemory of ondevice/trusty/trusty_shared_memory_manager.cc, there is a possible out of bounds read due to an incorrect bounds check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 10/25/2024
The vulnerability identified as CVE-2024-47029 resides within the TrustySharedMemoryManager::GetSharedMemory function in the ondevice/trusty/trusty_shared_memory_manager.cc source file, representing a critical out-of-bounds read flaw that compromises system security. This issue manifests due to an inadequate bounds check implementation that fails to properly validate memory access boundaries. The flaw specifically affects the trusty secure execution environment component responsible for managing shared memory operations between trusted and untrusted execution contexts. The vulnerability's nature indicates a fundamental weakness in memory management validation logic where the system incorrectly calculates or verifies memory access parameters, leading to potential data exposure through unauthorized memory reads.
The technical implementation of this vulnerability stems from improper bounds checking mechanisms that should validate memory access ranges before allowing read operations. When the GetSharedMemory function processes memory requests, it fails to adequately verify that the requested memory address falls within acceptable boundaries, creating a scenario where adjacent memory regions can be accessed without proper authorization. This type of flaw typically occurs when developers assume certain memory layouts or fail to account for all possible input values during validation. The vulnerability operates at the kernel level within the trusty secure subsystem, making it particularly dangerous as it can be exploited to extract sensitive information from protected memory regions that should remain inaccessible to unprivileged processes.
The operational impact of CVE-2024-47029 extends beyond simple information disclosure, as it represents a significant security weakness in the system's memory protection mechanisms. Attackers can leverage this vulnerability to gain unauthorized access to sensitive data stored in adjacent memory locations, potentially including cryptographic keys, user credentials, or other confidential information. The fact that no additional execution privileges are required for exploitation makes this vulnerability particularly concerning, as it can be exploited by any local user or process with basic system access. This weakness directly violates the principle of least privilege and undermines the trusty secure execution environment's fundamental security guarantees. The vulnerability's classification aligns with CWE-129, which addresses improper validation of array indices, and represents a clear violation of secure coding practices that should prevent such memory access violations.
The exploitation of this vulnerability follows established attack patterns consistent with the ATT&CK framework's privilege escalation and credential access tactics. An attacker can craft specific memory access requests that trigger the out-of-bounds read condition, allowing them to extract information from memory locations that should remain protected. This type of attack typically involves identifying memory regions containing sensitive data and then manipulating the GetSharedMemory function to read beyond its intended boundaries. The lack of user interaction requirement means that automated exploitation is possible, potentially enabling attackers to perform continuous reconnaissance or data extraction without requiring direct user involvement. This vulnerability's impact is further amplified by its location within the trusty secure subsystem, which is designed to provide isolation and protection for sensitive operations.
Mitigation strategies for CVE-2024-47029 should focus on implementing robust bounds checking mechanisms within the TrustySharedMemoryManager::GetSharedMemory function. The fix requires proper validation of all memory access parameters, including input size calculations, address boundaries, and array index verification. Security patches should enforce strict memory access controls that prevent any reads beyond defined memory regions, implementing comprehensive boundary checks that account for all possible input values. Organizations should prioritize applying vendor-provided security updates immediately, as the vulnerability exists within core system components that are critical for maintaining security isolation. Additionally, system administrators should conduct thorough security assessments to identify any potential exploitation attempts and implement monitoring solutions that can detect anomalous memory access patterns. The vulnerability's remediation should also include code reviews and static analysis to prevent similar issues in other memory management functions within the trusty secure execution environment, ensuring that all shared memory operations maintain proper bounds checking and access controls to preserve system security guarantees.