CVE-2023-42870 in iOS
Summary
by MITRE • 01/11/2024
A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Sonoma 14, iOS 17 and iPadOS 17. An app may be able to execute arbitrary code with kernel privileges.
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Analysis
by VulDB Data Team • 08/30/2024
This vulnerability represents a critical use-after-free condition that affects the memory management subsystem of Apple's operating systems. The flaw occurs when an application attempts to access memory that has already been freed, creating a potential pathway for malicious code execution. Such issues are particularly dangerous because they can be exploited to gain kernel-level privileges, effectively allowing attackers to bypass system security controls and execute arbitrary code with the highest possible system permissions. The vulnerability was specifically addressed through enhanced memory management mechanisms implemented in the affected system versions.
The technical nature of this flaw aligns with common software security weaknesses categorized under CWE-416, which deals with the use of freed memory conditions. When a program releases memory back to the system but continues to reference that memory location, it creates an opportunity for attackers to manipulate the freed memory space. This particular vulnerability demonstrates how memory management errors can be escalated to privilege escalation attacks, where the attacker's code can operate at the kernel level with complete system control. The exploitability of such conditions is significantly enhanced when they occur in system-level components that handle memory operations, as these components typically run with elevated privileges.
The operational impact of this vulnerability extends beyond simple code execution, as it fundamentally compromises the integrity of the operating system's memory protection mechanisms. Attackers who successfully exploit this condition can manipulate kernel data structures, bypass security features like code signing and sandboxing, and potentially establish persistent backdoors. The privilege escalation capability means that even if an attacker initially gains access through a less privileged application, they can leverage this vulnerability to achieve full system compromise. This type of vulnerability also creates risks for enterprise environments where macOS and iOS devices may be targeted by sophisticated adversaries seeking to gain unauthorized access to sensitive corporate data.
Organizations should prioritize immediate deployment of the security updates provided by Apple, specifically ensuring that all macOS Sonoma 14, iOS 17, and iPadOS 17 systems are upgraded to mitigate this risk. System administrators should also implement monitoring for suspicious memory access patterns and unusual kernel activity that might indicate exploitation attempts. The remediation process should include comprehensive vulnerability assessments across all affected platforms, with particular attention to applications that may interact with system memory management components. Additionally, maintaining updated threat intelligence feeds will help identify potential exploitation attempts targeting this specific vulnerability, as attackers often leverage known vulnerabilities in the initial compromise phases of their campaigns.