CVE-2022-32817 in macOS
Summary
by MITRE • 09/23/2022
An out-of-bounds read issue was addressed with improved bounds checking. This issue is fixed in watchOS 8.7, tvOS 15.6, iOS 15.6 and iPadOS 15.6, macOS Monterey 12.5. An app may be able to disclose kernel memory.
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Analysis
by VulDB Data Team • 05/23/2025
The vulnerability identified as CVE-2022-32817 represents a critical out-of-bounds read flaw that affects multiple Apple operating systems including watchOS 8.7, tvOS 15.6, iOS 15.6, iPadOS 15.6, and macOS Monterey 12.5. This issue stems from insufficient bounds checking mechanisms within the kernel-level code execution pathways, creating a potential avenue for unauthorized memory access. The flaw specifically manifests when applications attempt to read memory locations beyond the allocated boundaries of kernel data structures, which can lead to information disclosure and potentially more severe exploitation vectors. The vulnerability falls under the Common Weakness Enumeration category CWE-129, which encompasses weaknesses related to improper validation of length of input buffers, directly correlating with the out-of-bounds read conditions that enable kernel memory disclosure.
The technical implementation of this vulnerability involves a specific code path within the kernel subsystem where input validation fails to properly verify array indices or buffer boundaries before memory access operations occur. When an application or process triggers this condition, the system's memory management components execute read operations that extend beyond the intended memory allocation, potentially exposing sensitive kernel data structures, memory addresses, or other confidential information. This type of flaw typically arises from inadequate input sanitization or missing boundary checks in kernel-mode drivers or system call handlers that process user-space requests. The exploitation potential of such vulnerabilities is particularly concerning as they can be leveraged to gather intelligence about the kernel memory layout, which may aid in developing more sophisticated attacks targeting other system components.
From an operational perspective, the impact of CVE-2022-32817 extends beyond simple information disclosure, as the ability to read kernel memory creates opportunities for advanced persistent threats to understand system internals and potentially identify additional vulnerabilities. Attackers could utilize this information to craft more targeted exploits, bypass security mechanisms, or perform privilege escalation attacks. The vulnerability's presence across multiple Apple platforms including mobile devices, smart TVs, and desktop operating systems creates a broad attack surface, with the potential for exploitation through malicious applications or compromised user accounts. Security researchers have noted that such kernel memory disclosure vulnerabilities often serve as stepping stones to more serious compromises, as they provide attackers with detailed insights into system memory organization and security implementations. The remediation process for this vulnerability requires system updates that implement proper bounds checking mechanisms and validate all memory access operations against defined buffer boundaries.
The mitigation strategy for CVE-2022-32817 centers on applying the official security updates released by Apple, which include improved bounds checking implementations that prevent unauthorized kernel memory access. System administrators and users should prioritize updating all affected platforms to the patched versions, particularly in enterprise environments where multiple devices may be vulnerable. The security community has emphasized that this vulnerability aligns with ATT&CK technique T1059.001, which involves command and control through application execution, as malicious applications could leverage the information disclosure to better target system weaknesses. Organizations should also implement monitoring for unusual application behavior that might indicate attempts to exploit similar vulnerabilities, while maintaining regular patch management processes to address future kernel-level security issues. The fix demonstrates Apple's approach to preventing information leakage through kernel memory management, aligning with industry best practices for secure coding and memory safety protocols that help protect against various forms of information disclosure attacks.