CVE-2022-42844 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 break out of its sandbox.
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Analysis
by VulDB Data Team • 04/22/2025
The vulnerability identified as CVE-2022-42844 represents a significant sandbox escape flaw in Apple's iOS and iPadOS operating systems. This issue stems from inadequate memory handling mechanisms that allow malicious applications to potentially bypass the security boundaries designed to isolate app processes from each other and from the underlying system resources. The vulnerability exists in versions prior to iOS 16.2 and iPadOS 16.2, where the sandboxing mechanisms fail to properly enforce memory access controls. The flaw manifests when an application can manipulate memory structures in ways that were not properly accounted for in the security model, creating potential pathways for unauthorized system access. This type of vulnerability directly impacts the fundamental security architecture that Apple employs to protect user data and system integrity.
The technical implementation of this vulnerability involves memory management inconsistencies that enable an attacker to exploit memory layout assumptions or access patterns that should be restricted. When an application attempts to access memory regions that are normally protected by sandboxing policies, the improper memory handling allows for unexpected behavior that can result in privilege escalation. The issue falls under the category of memory safety vulnerabilities and aligns with CWE-125 which describes out-of-bounds read conditions, though the specific exploitation vector involves sandbox bypass rather than direct memory corruption. The vulnerability can be leveraged by an app that has already gained some level of access to execute malicious code with elevated privileges, potentially allowing for data theft, system modification, or further exploitation of other system components.
The operational impact of CVE-2022-42844 extends beyond simple data breaches as it compromises the core security model that protects user privacy and system integrity. An attacker who successfully exploits this vulnerability could potentially access other applications' data, system files, or even gain root-level access to the device. This represents a critical escalation from typical sandbox violations as it undermines the fundamental security boundaries that separate user applications from each other and from system resources. The vulnerability affects all iOS and iPadOS devices running versions prior to 16.2, creating a substantial attack surface for threat actors who may develop or acquire exploits for this flaw. From an attacker's perspective, this vulnerability aligns with techniques described in the MITRE ATT&CK framework under the T1055 category for privilege escalation, specifically targeting system-level access through application sandbox bypass.
Apple's fix for this vulnerability involved implementing improved memory handling protocols that strengthen the enforcement of sandbox boundaries and prevent unauthorized memory access patterns. The update to iOS 16.2 and iPadOS 16.2 includes enhanced memory management controls that properly enforce access restrictions and prevent the exploitation vectors that previously allowed sandbox escape. Organizations and users should prioritize updating to these versions immediately, as the vulnerability represents a persistent risk to device security. Security teams should monitor for potential exploitation attempts and consider this vulnerability as part of their broader threat landscape assessment, particularly in environments where iOS devices are used for sensitive operations. The fix demonstrates Apple's ongoing commitment to addressing memory safety issues that could compromise the security model, though the vulnerability highlights the complexity of maintaining secure sandbox implementations in modern operating systems.