CVE-2022-32812 in macOS
Summary
by MITRE • 08/25/2022
The issue was addressed with improved memory handling. This issue is fixed in macOS Monterey 12.5, macOS Big Sur 11.6.8, Security Update 2022-005 Catalina. An app may be able to execute arbitrary code with kernel privileges.
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Analysis
by VulDB Data Team • 05/29/2025
This vulnerability represents a critical memory handling flaw that could enable malicious applications to escalate privileges and execute arbitrary code with kernel-level permissions. The issue was identified in Apple's operating system implementations and specifically affected macOS versions prior to the mentioned security updates. The vulnerability stems from inadequate memory management controls that allow user-space applications to potentially corrupt kernel memory structures or bypass memory protection mechanisms. Such flaws typically arise when the operating system fails to properly validate memory access patterns or when memory allocation routines lack sufficient bounds checking. The implications extend beyond simple privilege escalation as kernel-level access provides complete control over system resources, potentially enabling attackers to modify critical system components, access sensitive data, or establish persistent backdoors. This type of vulnerability directly relates to CWE-121, which addresses stack buffer overflow conditions, and CWE-122, which covers heap buffer overflow conditions, both of which are common precursors to kernel privilege escalation exploits. The ATT&CK framework categorizes this under privilege escalation techniques, specifically T1068, which involves exploiting vulnerabilities to gain elevated privileges.
The technical exploitation of this vulnerability would likely involve crafting malicious code that can manipulate memory layouts or trigger memory corruption conditions that allow the attacker to execute code within kernel space. This typically requires sophisticated understanding of the target operating system's memory management subsystem, including kernel virtual memory layout, memory protection mechanisms, and privilege level transitions. Attackers might leverage techniques such as return-oriented programming or use-after-free conditions to achieve the necessary memory corruption. The fix implemented by Apple involved strengthening memory handling routines and improving validation checks for memory operations that could be manipulated by user applications. These improvements likely included enhanced bounds checking, stricter memory access controls, and better isolation between user and kernel memory spaces.
The operational impact of this vulnerability is severe as it provides a pathway for attackers to achieve complete system compromise without requiring physical access or additional attack vectors. Once an attacker successfully exploits this vulnerability, they can perform actions such as installing persistent malware, accessing encrypted data, modifying system files, or creating unauthorized user accounts. The affected systems include macOS Monterey 12.5, macOS Big Sur 11.6.8, and Security Update 2022-005 Catalina, indicating that the vulnerability affected multiple major versions of Apple's operating system. Organizations running these vulnerable versions face significant risk as the exploit could be weaponized and deployed through various attack vectors including malicious email attachments, compromised websites, or software supply chain attacks. The vulnerability's exploitation potential makes it particularly dangerous for enterprise environments where macOS systems may be targeted by advanced persistent threat actors.
Mitigation strategies should prioritize immediate deployment of the recommended security updates, which include macOS Monterey 12.5, macOS Big Sur 11.6.8, and Security Update 2022-005 Catalina. System administrators should implement comprehensive patch management processes to ensure all macOS systems are updated promptly. Additional protective measures include monitoring for suspicious kernel-level activities, implementing application whitelisting policies, and conducting regular security audits of macOS systems. Network segmentation and intrusion detection systems should be configured to detect potential exploitation attempts. Organizations should also consider implementing endpoint protection solutions that can detect and block suspicious memory manipulation activities. The vulnerability highlights the importance of maintaining up-to-date security patches and demonstrates the critical nature of kernel-level security controls in modern operating systems. Regular security assessments and vulnerability scanning should be conducted to identify other potential memory-related vulnerabilities that could provide similar privilege escalation pathways.