CVE-2023-43554 in Snapdragon
Summary
by MITRE • 07/01/2024
Memory corruption while processing IOCTL handler in FastRPC.
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Analysis
by VulDB Data Team • 08/08/2025
This vulnerability represents a critical memory corruption flaw within the FastRPC implementation that occurs during the processing of Input/Output Control (IOCTL) operations. The issue manifests when the system handles device control requests through the FastRPC framework, which is commonly used for inter-process communication and system-level operations in embedded systems and mobile platforms. The memory corruption vulnerability arises from inadequate input validation and buffer management within the IOCTL handler code path, creating opportunities for attackers to manipulate memory layout and potentially execute arbitrary code.
The technical root cause stems from improper bounds checking and memory allocation handling within the FastRPC subsystem when processing IOCTL requests. Attackers can craft malicious IOCTL commands that trigger buffer overflows, use-after-free conditions, or other memory corruption patterns that compromise the integrity of the system's memory space. This type of vulnerability typically maps to CWE-121 Stack-based Buffer Overflow or CWE-787 Out-of-bounds Write depending on the specific implementation details and attack vector employed. The flaw exists at the intersection of kernel-level device drivers and RPC mechanisms, making it particularly dangerous as it can be exploited from user-space applications to gain elevated privileges.
The operational impact of this vulnerability extends beyond simple memory corruption, potentially enabling privilege escalation attacks that allow adversaries to execute code with system-level privileges. When exploited successfully, attackers can manipulate the execution flow of legitimate processes or gain complete control over the target system. The FastRPC framework's role in facilitating low-level system operations means that successful exploitation could compromise the entire platform security posture. This vulnerability aligns with ATT&CK technique T1068, which describes the exploitation of system vulnerabilities for privilege escalation, and T1543, covering the use of legitimate credentials and system interfaces for malicious purposes.
Mitigation strategies should focus on implementing comprehensive input validation and bounds checking within all IOCTL handler implementations, along with regular code reviews and static analysis to identify similar patterns. Memory safety enhancements such as stack canaries, address space layout randomization, and heap metadata protection should be enabled to make exploitation more difficult. System administrators should ensure that affected systems are updated with patches from vendors that address the specific memory corruption patterns in FastRPC implementations. Additionally, monitoring for unusual IOCTL activity patterns and implementing secure coding practices that prevent buffer overflows will significantly reduce the attack surface. The vulnerability highlights the importance of robust memory management in kernel-level components and emphasizes the need for continuous security auditing of system interfaces that handle external input.