CVE-2023-30645 in Smart Phone
Summary
by MITRE • 07/06/2023
Heap out of bound write vulnerability in IpcRxIncomingCBMsg of RILD prior to SMR Jul-2023 Release 1 allows attackers to execute arbitrary code.
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Analysis
by VulDB Data Team • 07/06/2023
The vulnerability identified as CVE-2023-30645 represents a critical heap out of bounds write flaw within the RILD (Radio Interface Layer Daemon) component of Android systems. This vulnerability specifically affects the IpcRxIncomingCBMsg function which processes incoming callback messages in the radio interface layer. The issue exists in versions prior to the SMR July 2023 Release 1, indicating this was a known weakness that required patching through the standard Android security release cycle. The vulnerability stems from improper bounds checking during memory allocation and data processing within the IPC (Inter-Process Communication) handling mechanism of the radio subsystem.
The technical flaw manifests as an out of bounds write condition that occurs when the IpcRxIncomingCBMsg function processes incoming callback messages without adequate validation of message buffer sizes or content lengths. This allows attackers to write data beyond the allocated heap memory boundaries, potentially corrupting adjacent memory regions and creating opportunities for arbitrary code execution. The vulnerability is particularly dangerous because it operates within the RILD process which runs with elevated privileges and has direct access to radio hardware components. This flaw falls under the Common Weakness Enumeration category of CWE-787: Out-of-bounds Write, which is classified as a critical weakness in software security.
The operational impact of this vulnerability extends beyond simple code execution capabilities, as it provides attackers with a potential pathway to compromise the entire radio communication stack of mobile devices. Since RILD handles critical radio interface operations including cellular connectivity, SMS messaging, and call management, successful exploitation could lead to complete device compromise, data exfiltration, or persistent backdoor installation. Attackers could leverage this vulnerability to gain unauthorized access to sensitive communication channels, potentially intercepting or modifying cellular traffic. This vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter and T1068 for Exploitation for Privilege Escalation, as it enables attackers to execute malicious code with elevated privileges within the radio subsystem.
Mitigation strategies for CVE-2023-30645 primarily focus on applying the vendor-provided security patches released as part of the SMR July 2023 Update. Organizations and device manufacturers should prioritize immediate deployment of these patches across all affected Android devices, particularly those running versions prior to the patched release. Additionally, system administrators should implement network monitoring to detect anomalous radio interface activity that might indicate exploitation attempts. The vulnerability highlights the importance of maintaining up-to-date security patches for mobile operating systems and emphasizes the need for robust input validation in IPC mechanisms. Security teams should also consider implementing runtime protections and memory corruption detection mechanisms to provide additional layers of defense against similar vulnerabilities in the radio interface layer.