CVE-2023-38261 in macOS
Summary
by MITRE • 07/27/2023
The issue was addressed with improved memory handling. This issue is fixed in iOS 16.6 and iPadOS 16.6, macOS Ventura 13.5. An app may be able to execute arbitrary code with kernel privileges.
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Analysis
by VulDB Data Team • 08/18/2023
This vulnerability represents a critical kernel-level memory handling flaw that could potentially allow malicious applications to execute arbitrary code with elevated privileges. The issue stems from inadequate memory management controls within the operating system kernel, creating a pathway for privilege escalation attacks. The vulnerability affects Apple's mobile and desktop operating systems, specifically targeting iOS 16.5 and earlier versions, iPadOS 16.5 and earlier versions, and macOS Ventura 13.4 and earlier versions. The flaw demonstrates a classic memory corruption vulnerability that could be exploited by malicious actors to gain unauthorized access to system-level resources and execute commands with kernel-level privileges. This type of vulnerability falls under the category of privilege escalation flaws that are particularly dangerous due to their potential to compromise entire system operations.
The technical implementation of this vulnerability involves improper memory handling mechanisms that fail to adequately validate memory access patterns or enforce proper memory boundaries. Attackers could potentially exploit this weakness through carefully crafted applications that manipulate memory structures in ways that bypass normal security controls. The vulnerability likely involves memory corruption techniques such as buffer overflows or use-after-free conditions that allow attackers to manipulate kernel memory spaces. When an application successfully exploits this flaw, it can execute code with the highest system privileges, effectively bypassing all normal user-mode security restrictions. This represents a significant compromise of the operating system's security model and could enable attackers to gain complete control over affected devices.
The operational impact of this vulnerability extends beyond individual device compromise to potentially affect entire network infrastructures. Once an attacker gains kernel-level privileges, they can access all system resources, modify critical system files, install persistent backdoors, and exfiltrate sensitive data without detection. The vulnerability's exploitation could lead to widespread compromise of user devices, particularly in enterprise environments where iOS and macOS devices are prevalent. Organizations relying on these platforms for business operations face significant risk if devices remain unpatched, as attackers could use this vulnerability to establish persistent access to corporate networks through compromised endpoints. The threat landscape is particularly concerning given that kernel-level exploits are extremely difficult to detect and remediate once established.
Apple addressed this vulnerability through comprehensive memory handling improvements in iOS 16.6, iPadOS 16.6, and macOS Ventura 13.5 releases. The fix likely involved implementing stricter memory validation controls, enhanced memory access monitoring, and improved kernel memory management routines. Security researchers and cybersecurity professionals should prioritize deployment of these updates across all affected systems to mitigate the risk of exploitation. Organizations should also implement additional monitoring controls to detect potential exploitation attempts, as the vulnerability could be weaponized in targeted attacks. The mitigation strategy should include regular patch management procedures, endpoint detection and response capabilities, and comprehensive security awareness training for users who may encounter potentially malicious applications. This vulnerability serves as a reminder of the critical importance of maintaining up-to-date security patches for operating systems, particularly for kernel-level vulnerabilities that can provide complete system compromise.