CVE-2023-42826 in macOS
Summary
by MITRE • 01/11/2024
The issue was addressed with improved checks. This issue is fixed in macOS Sonoma 14. Processing a file may lead to arbitrary code execution.
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Analysis
by VulDB Data Team • 06/21/2025
The vulnerability identified as CVE-2023-42826 represents a critical security flaw in macOS Sonoma 14 that stems from insufficient input validation during file processing operations. This weakness allows malicious actors to craft specially formatted files that, when processed by affected systems, can trigger arbitrary code execution. The vulnerability specifically manifests in the way the operating system handles file parsing and interpretation, creating a pathway for attackers to bypass normal security controls and execute unauthorized commands within the target environment. The issue was resolved through enhanced validation mechanisms that strengthen the file processing pipeline and improve the system's ability to detect and reject malformed inputs.
The technical nature of this vulnerability aligns with common software security patterns where improper input sanitization leads to code execution flaws. This particular weakness likely resides in the file handling subsystem of macOS, potentially affecting various file types that the operating system processes automatically or through user interaction. The implementation of improved checks suggests that the original flaw involved insufficient bounds checking or type validation when parsing file headers, metadata, or content structures. Such vulnerabilities typically fall under the category of buffer overflows, format string vulnerabilities, or injection flaws as defined by the Common Weakness Enumeration framework. The remediation approach demonstrates a defensive programming strategy that emphasizes input validation and proper resource management to prevent unauthorized execution paths.
The operational impact of CVE-2023-42826 extends beyond simple privilege escalation or data theft, as arbitrary code execution provides attackers with complete system compromise capabilities. Once exploited, this vulnerability allows threat actors to install persistent backdoors, exfiltrate sensitive data, modify system configurations, or establish command and control channels without detection. The attack surface is particularly concerning given that file processing occurs frequently in user environments, making exploitation relatively accessible through social engineering campaigns or compromised websites. Security professionals should consider this vulnerability in the context of the MITRE ATT&CK framework, where it maps to techniques involving exploitation of vulnerabilities, privilege escalation, and persistence mechanisms. The risk assessment indicates that organizations relying on macOS Sonoma 14 systems face significant exposure until proper patching is implemented across all affected endpoints.
Organizations should prioritize immediate deployment of the macOS Sonoma 14 update that resolves this vulnerability, as the window for exploitation remains open during the patch deployment period. Security teams should implement additional monitoring for suspicious file processing activities and anomalous system behavior that might indicate exploitation attempts. Network-based detection measures should be enhanced to identify potential malicious file transfers or web-based attack vectors targeting this specific weakness. The mitigation strategy should include user education regarding safe file handling practices, particularly when dealing with attachments from unknown sources or files downloaded from untrusted websites. System administrators should also consider implementing application whitelisting policies and sandboxing mechanisms to limit the potential impact of successful exploitation attempts. Regular vulnerability assessments and penetration testing should be conducted to ensure comprehensive coverage of similar file processing vulnerabilities across the entire operating system ecosystem.