CVE-2023-42907 in macOS
Summary
by MITRE • 12/12/2023
Multiple memory corruption issues were addressed with improved input validation. This issue is fixed in macOS Sonoma 14.2. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 01/02/2024
The vulnerability identified as CVE-2023-42907 represents a critical memory corruption flaw affecting macOS Sonoma 14.2 and earlier versions. This issue stems from insufficient input validation mechanisms within the operating system's file processing components, creating potential entry points for malicious actors to exploit system stability and security. The vulnerability manifests when the system encounters specially crafted files designed to trigger memory corruption conditions during normal file handling operations. Such flaws typically arise from inadequate bounds checking and memory management practices within the kernel or system libraries responsible for file interpretation and processing.
The technical exploitation of this vulnerability follows patterns consistent with memory corruption attacks classified under CWE-121, which deals with stack-based buffer overflows, and CWE-122, addressing heap-based buffer overflows. Attackers can craft malicious files that, when processed by vulnerable macOS versions, cause memory corruption through improper input handling. The system's failure to validate file contents properly allows attackers to manipulate memory layouts and potentially execute arbitrary code with the privileges of the affected application. This type of vulnerability aligns with ATT&CK technique T1059.001 for command and scripting interpreter, where successful exploitation could enable further malicious activities through compromised system processes.
The operational impact of CVE-2023-42907 extends beyond simple application crashes, as the vulnerability can lead to complete system compromise when exploited effectively. Unintended application termination represents the most immediate consequence, but the more dangerous aspect involves potential arbitrary code execution that could allow attackers to install malware, establish persistence mechanisms, or escalate privileges within the compromised system. The vulnerability affects the core file processing infrastructure of macOS, meaning that any application or system function that handles file input could potentially be exploited, including web browsers, document processors, and system utilities. This broad attack surface increases the likelihood of successful exploitation across multiple system components.
Organizations and users should immediately apply the macOS Sonoma 14.2 update to mitigate this vulnerability, as it contains the necessary input validation improvements to address the memory corruption issues. System administrators should prioritize patch deployment across all affected macOS systems, particularly those handling untrusted file inputs or operating in high-risk environments. Additional mitigations include implementing file filtering mechanisms, restricting user access to potentially malicious file types, and monitoring system logs for unusual application termination patterns that might indicate exploitation attempts. The vulnerability's classification as a memory corruption issue also necessitates regular security assessments of file processing workflows and input validation procedures within custom applications running on affected systems.