CVE-2023-40407 in macOS
Summary
by MITRE • 09/27/2023
The issue was addressed with improved bounds checks. This issue is fixed in macOS Sonoma 14. A remote attacker may be able to cause a denial-of-service.
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Analysis
by VulDB Data Team • 11/06/2025
The vulnerability identified as CVE-2023-40407 represents a denial-of-service weakness that was specifically addressed through enhanced bounds checking mechanisms within the macOS Sonoma 14 operating system. This issue stems from insufficient input validation that could potentially allow malicious actors to exploit memory boundaries during processing operations. The flaw manifests when the system fails to properly verify array or buffer limits during data handling procedures, creating opportunities for attackers to manipulate memory access patterns. Such vulnerabilities typically arise in systems where developers assume proper input boundaries without implementing adequate verification mechanisms, leading to potential system instability or complete service interruption.
The technical nature of this vulnerability aligns with common software security weaknesses categorized under CWE-129, which addresses insufficient bounds checking for buffer access operations. The flaw operates at the system level where memory management routines fail to validate input parameters before processing, potentially allowing attackers to trigger buffer overflows or underflows. When exploited, this vulnerability enables a remote attacker to craft malicious inputs that exceed expected memory boundaries, causing the target system to crash or become unresponsive. The attack vector specifically leverages network-based communication channels where the vulnerable system processes external data, making it particularly concerning for networked environments.
The operational impact of CVE-2023-40407 extends beyond simple service interruption to potentially compromise system availability and integrity within affected macOS environments. Organizations running macOS Sonoma 14 should consider this vulnerability as part of their broader security posture assessment, particularly in mission-critical systems where continuous availability is paramount. The remote exploitation capability means that attackers do not require physical access to target systems, making this vulnerability particularly dangerous in enterprise environments where macOS systems handle sensitive data and critical operations. System administrators should evaluate their current deployment of macOS Sonoma 14 to ensure all systems are properly patched and updated to prevent potential exploitation attempts.
Mitigation strategies for CVE-2023-40407 primarily focus on implementing the official security updates provided by Apple for macOS Sonoma 14. Organizations should prioritize immediate deployment of patches to address the bounds checking deficiencies that enable this denial-of-service condition. Network administrators should consider implementing additional monitoring and intrusion detection systems to identify potential exploitation attempts targeting this vulnerability. The remediation process should include comprehensive testing of patched systems to ensure that the bounds checking improvements function correctly without introducing compatibility issues. Security teams should also conduct vulnerability assessments to identify any other systems that might be running older versions of macOS or other software components that could be susceptible to similar bounds checking vulnerabilities.
The remediation approach for this vulnerability aligns with standard security practices outlined in the MITRE ATT&CK framework under the technique T1499, which covers resource hijacking and denial-of-service attacks. Organizations should maintain continuous vulnerability management processes that include regular security updates, automated patch deployment systems, and ongoing monitoring of threat intelligence feeds. The implementation of proper input validation and bounds checking mechanisms represents a fundamental security control that should be integrated into all software development lifecycle processes. Regular security assessments and penetration testing should be conducted to identify and remediate similar vulnerabilities that could potentially compromise system availability and integrity.