CVE-2022-46702 in iOS
Summary
by MITRE • 12/15/2022
The issue was addressed with improved memory handling. This issue is fixed in iOS 16.2 and iPadOS 16.2. An app may be able to disclose kernel memory.
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Analysis
by VulDB Data Team • 01/09/2023
This vulnerability represents a memory safety issue that existed in Apple's iOS and iPadOS operating systems prior to version 16.2. The flaw was categorized as a memory handling problem that could potentially allow malicious applications to access kernel memory regions that should remain protected from user-space applications. The vulnerability was addressed through enhanced memory management protocols and improved kernel protection mechanisms. Security researchers identified that under certain conditions, an application could exploit improper memory handling to gain unauthorized access to sensitive kernel memory areas, which could contain critical system information and credentials.
The technical nature of this vulnerability aligns with common memory corruption issues that fall under the CWE-125 weakness category, which describes out-of-bounds read conditions where programs access memory locations beyond their allocated boundaries. This particular flaw was classified as a kernel memory disclosure vulnerability, representing a significant security concern since kernel memory contains sensitive system data that should remain isolated from user applications. The vulnerability could potentially enable attackers to extract confidential information that could be used for further exploitation or system compromise.
From an operational perspective, this vulnerability posed a serious risk to device security as it could allow a malicious app to access kernel memory contents that should remain protected. The impact extends beyond simple information disclosure since kernel memory often contains sensitive data structures, cryptographic keys, and system state information that could be leveraged by attackers to escalate privileges or bypass security controls. This type of vulnerability is particularly concerning because it operates at the kernel level where applications have the highest privileges and can access the most sensitive system resources. The issue was resolved through iOS 16.2 and iPadOS 16.2 updates that implemented improved memory management and access control mechanisms.
The mitigation strategy for this vulnerability required users to update their devices to iOS 16.2 or iPadOS 16.2, which included enhanced memory handling protections and improved kernel memory isolation. Security professionals should ensure all devices within their environment are updated to these versions to prevent exploitation. The vulnerability demonstrates the importance of maintaining up-to-date operating system versions and highlights the critical nature of kernel memory protection in mobile operating systems. Organizations should implement robust patch management processes to ensure timely deployment of security updates and maintain visibility into device security status through proper inventory and monitoring systems. The fix implemented by Apple likely included enhanced memory bounds checking and improved kernel memory protection mechanisms that align with the defensive techniques recommended in the ATT&CK framework for mitigating memory corruption vulnerabilities.