CVE-2016-7653 in iOS
Summary
by MITRE
An issue was discovered in certain Apple products. iOS before 10.2 is affected. The issue involves the "Media Player" component, which allows physically proximate attackers to obtain sensitive photo and contact information by leveraging lockscreen access.
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Analysis
by VulDB Data Team • 10/05/2022
The vulnerability identified as CVE-2016-7653 represents a significant security flaw in Apple's iOS operating system affecting versions prior to 10.2. This weakness resides within the Media Player component and demonstrates how seemingly innocuous media playback functionality can be exploited to compromise user privacy. The issue specifically targets devices where an attacker has physical proximity to the target device and can access the lockscreen interface, creating a vector for unauthorized data extraction that bypasses normal security boundaries.
The technical flaw exploits the Media Player's handling of media files and their associated metadata when accessed through the lockscreen interface. When users play media content such as photos or videos through the Media Player component while the device is locked, the system fails to properly enforce access controls that would normally prevent unauthorized viewing of sensitive information. This vulnerability allows attackers to navigate through media libraries and extract contact information, photos, and other personal data without proper authentication. The flaw specifically leverages the trust model that exists between the media player and the lockscreen environment, where the system assumes that media playback operations should not expose sensitive user data.
From an operational perspective, this vulnerability creates a serious privacy risk for iOS users who may be physically compromised while their devices are locked. Attackers can exploit this issue without requiring network access or complex exploitation techniques, making it particularly dangerous in environments where physical security is compromised. The vulnerability's impact extends beyond simple information disclosure as it can potentially expose personal contact information, photographs, and other sensitive media content that users might store on their devices. This type of attack vector aligns with the ATT&CK framework's privilege escalation and credential access tactics, where an attacker gains unauthorized access to information through legitimate system functionality.
The security implications of CVE-2016-7653 demonstrate how mobile device security relies heavily on proper access control enforcement even within trusted application boundaries. This vulnerability highlights the importance of implementing robust security controls at every layer of the operating system, particularly when dealing with media processing components that may be accessed through multiple user interfaces. The issue represents a failure in the principle of least privilege, where the Media Player component should not have access to sensitive information beyond what is necessary for media playback functionality. This weakness can be classified under CWE-284, which deals with improper access control, and specifically relates to inadequate protection of sensitive information through system interfaces.
Mitigation strategies for this vulnerability primarily involve upgrading to iOS version 10.2 or later, which contains the necessary security patches to address the Media Player access control issue. Organizations should implement comprehensive mobile device management policies that ensure all iOS devices receive timely security updates. Additionally, users should be educated about the risks of physical proximity attacks and the importance of securing their devices through strong passcodes and biometric authentication methods. The vulnerability underscores the need for continuous security monitoring and patch management processes, particularly for mobile platforms where physical security breaches can lead to significant privacy compromises. Security teams should also consider implementing additional controls such as device encryption and remote wipe capabilities to protect against potential exploitation of this vulnerability.