CVE-2023-30681 in Smart Phone
Summary
by MITRE • 08/10/2023
An improper input validation vulnerability within initialize function in HAL VaultKeeper prior to SMR Aug-2023 Release 1 allows attacker to cause out-of-bounds write.
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Analysis
by VulDB Data Team • 09/05/2023
The vulnerability identified as CVE-2023-30681 represents a critical improper input validation flaw within the Hardware Abstraction Layer VaultKeeper component of a mobile device security system. This issue specifically affects devices running firmware versions prior to the SMR August 2023 Release 1, creating a pathway for malicious actors to exploit input validation weaknesses in the initialize function. The vulnerability stems from inadequate bounds checking mechanisms that fail to properly validate user-supplied data before processing, allowing attackers to manipulate input parameters in ways that exceed allocated memory boundaries. This particular flaw falls under the CWE-129 category of Improper Input Validation, which is classified as a fundamental weakness in input sanitization that can lead to various memory corruption vulnerabilities. The vulnerability exists within the HAL VaultKeeper module, which serves as a critical interface between the operating system and hardware security components, making it a prime target for attackers seeking to compromise device security.
The technical exploitation of this vulnerability occurs when the initialize function processes input parameters without sufficient validation, enabling an attacker to craft malicious inputs that trigger an out-of-bounds write condition. This type of memory corruption vulnerability typically arises when the system allocates a fixed-size buffer or array and subsequently writes data beyond its allocated boundaries. The improper input validation allows attackers to manipulate the size parameter or data structure elements in a way that causes the system to write data beyond the intended memory allocation, potentially overwriting adjacent memory locations. This can result in arbitrary code execution, system crashes, or unauthorized access to sensitive data stored within the device's secure enclave. The vulnerability is particularly concerning because it operates at the hardware abstraction layer, meaning that successful exploitation could potentially bypass higher-level security mechanisms and directly compromise the device's secure storage capabilities. From an attack perspective, this vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter and T1068 for Exploitation for Privilege Escalation, as it provides a pathway for attackers to gain elevated privileges and execute malicious code within the device's trusted execution environment.
The operational impact of CVE-2023-30681 extends beyond simple memory corruption, as it fundamentally undermines the security assurances provided by the VaultKeeper component. Devices affected by this vulnerability may experience complete system compromise, with attackers potentially gaining access to encrypted data, authentication credentials, and other sensitive information stored within the secure hardware module. The out-of-bounds write condition creates opportunities for attackers to overwrite critical system memory regions, potentially leading to persistent backdoors or complete device takeover. Organizations and users operating devices with firmware versions prior to SMR August 2023 Release 1 face significant risk of exploitation, particularly in environments where device security is paramount such as enterprise networks, financial institutions, or government agencies handling sensitive information. The vulnerability also poses risks to device integrity and availability, as successful exploitation could result in device instability or complete system failure, affecting both individual users and enterprise operations.
Mitigation strategies for CVE-2023-30681 primarily focus on firmware updates and system hardening measures. The most effective immediate solution involves upgrading to the SMR August 2023 Release 1 or later versions that contain the patched initialize function with proper input validation mechanisms. Security researchers and device manufacturers should implement comprehensive input validation checks that include bounds verification, data type validation, and size parameter constraints to prevent malicious inputs from causing memory corruption. Organizations should conduct thorough vulnerability assessments to identify all affected devices within their networks and prioritize remediation efforts based on risk exposure. Additional mitigations include implementing runtime protection mechanisms such as stack canaries, address space layout randomization, and memory protection features that can detect and prevent exploitation attempts. From a defensive perspective, security teams should monitor for exploitation attempts and implement network-based intrusion detection systems that can identify suspicious traffic patterns associated with this vulnerability. The remediation process should also include comprehensive testing of updated firmware to ensure that the patch does not introduce regressions or compatibility issues with existing device functionality, while maintaining the integrity of the secure hardware environment that VaultKeeper is designed to protect.