CVE-2016-7638 in iOS
Summary
by MITRE
An issue was discovered in certain Apple products. iOS before 10.2 is affected. The issue involves the "Find My iPhone" component, which allows physically proximate attackers to disable this component by bypassing authentication.
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Analysis
by VulDB Data Team • 10/05/2022
The vulnerability identified as CVE-2016-7638 represents a critical security flaw within Apple's iOS ecosystem, specifically affecting versions prior to iOS 10.2. This issue resides within the "Find My iPhone" feature, which serves as a fundamental device management and security component designed to help users locate lost devices and remotely secure their personal information. The vulnerability fundamentally undermines the security posture of affected iOS devices by creating an authentication bypass mechanism that allows attackers to disable the very protection system meant to safeguard user data.
The technical implementation of this flaw stems from insufficient authentication checks within the Find My iPhone component's interface and underlying system calls. Attackers capable of physical proximity to a target device can exploit this weakness to manipulate the system's permission controls, effectively disabling the Find My iPhone functionality without proper authorization. This vulnerability operates at a low-level system interface where legitimate user authentication mechanisms are bypassed, allowing unauthorized modification of critical security settings. The flaw demonstrates poor access control implementation and inadequate session management within Apple's device security architecture, creating a pathway for attackers to undermine device integrity and user privacy.
The operational impact of this vulnerability extends beyond simple device security compromise, as it fundamentally weakens the protection mechanisms that users rely upon for device recovery and data security. When an attacker successfully disables Find My iPhone, they eliminate the primary means by which users can locate lost devices, remotely wipe sensitive information, or track device location. This creates a scenario where stolen devices become essentially untraceable and secure from remote management, leaving users vulnerable to data theft and privacy breaches. The vulnerability is particularly concerning because it requires minimal attack surface - simply being physically near a device provides sufficient access to exploit the flaw, making it a significant concern for both individual users and enterprise security teams managing mobile device fleets.
From a cybersecurity perspective, this vulnerability aligns with CWE-287, which addresses improper authentication issues in software systems, and demonstrates characteristics consistent with ATT&CK technique T1531, involving the use of unauthorized access to system privileges. The flaw represents a critical weakness in Apple's defense-in-depth strategy, where a single authentication bypass can disable multiple security features simultaneously. Organizations and individuals using affected iOS versions face elevated risk of device compromise, particularly in environments where physical security controls may be insufficient or where devices are frequently in public spaces where attackers could gain proximity access. The vulnerability also highlights the importance of timely security updates and the potential consequences of delayed patch deployment in mobile operating systems.
Mitigation strategies for this vulnerability require immediate implementation of iOS 10.2 updates, which address the authentication bypass mechanism through enhanced access controls and improved session management. Users should also implement additional security measures such as strong passcode protection, remote wipe capabilities, and regular security assessments of their mobile device configurations. Security teams should monitor for exploitation attempts and consider implementing additional network-based controls to detect unauthorized device modifications. The vulnerability underscores the importance of maintaining current security patches and demonstrates how seemingly minor authentication flaws can create significant security risks in mobile device management systems. Organizations should conduct comprehensive risk assessments to identify affected devices and implement remediation procedures to ensure all endpoints maintain proper security posture against similar vulnerabilities.