CVE-2023-42846 in tvOS
Summary
by MITRE • 10/25/2023
This issue was addressed by removing the vulnerable code. This issue is fixed in watchOS 10.1, iOS 16.7.2 and iPadOS 16.7.2, tvOS 17.1, iOS 17.1 and iPadOS 17.1. A device may be passively tracked by its Wi-Fi MAC address.
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Analysis
by VulDB Data Team • 09/11/2024
This vulnerability represents a significant privacy concern in Apple's mobile operating systems where devices can be passively tracked through their Wi-Fi MAC address. The issue stems from how network interfaces handle MAC address exposure, creating a persistent identifier that adversaries can exploit to monitor device movement and behavior patterns. The vulnerability affects multiple Apple platforms including iOS, iPadOS, watchOS, and tvOS, indicating a systemic approach to network tracking that spans across the entire Apple ecosystem. This type of tracking capability undermines user privacy and can be leveraged for malicious purposes including location surveillance and behavioral analysis.
The technical flaw involves the improper handling of Wi-Fi MAC addresses within the network stack of affected Apple operating systems. MAC addresses serve as unique hardware identifiers for network interfaces, but when these addresses are broadcast or exposed in network communications without proper anonymization, they create persistent tracking vectors. The vulnerability allows for passive tracking because the MAC address remains consistent across network connections, making it possible for nearby devices or network infrastructure to monitor and correlate device movements over time. This issue aligns with CWE-200, which addresses improper exposure of sensitive information, and represents a classic example of how hardware identifiers can be exploited for tracking purposes when not properly managed by software systems.
The operational impact of this vulnerability extends beyond simple privacy concerns to encompass potential security risks including location-based attacks, targeted advertising, and surveillance activities. Attackers with access to Wi-Fi network infrastructure or nearby monitoring devices can collect MAC address information and use it to build detailed profiles of device users' movements and habits. This tracking capability can be particularly dangerous in environments where privacy is paramount, such as healthcare facilities, corporate offices, or residential areas where individuals expect their movements to remain private. The vulnerability demonstrates the intersection of physical security and digital privacy, where the hardware characteristics of devices become exploitable vectors for surveillance activities.
Apple's response to this vulnerability involved removing the vulnerable code that enabled passive tracking through Wi-Fi MAC addresses, effectively addressing the root cause of the issue. The fixes were rolled out through specific version updates including watchOS 10.1, iOS 16.7.2 and iPadOS 16.7.2, and tvOS 17.1, indicating a coordinated approach to remediation across multiple platforms. This remediation process aligns with ATT&CK framework tactic TA0001, which covers initial access through network-based reconnaissance and tracking activities. Organizations and users should prioritize updating to the patched versions to eliminate the risk of passive tracking. The solution demonstrates Apple's commitment to privacy protection by addressing the vulnerability at the code level rather than implementing workarounds or temporary measures.
The resolution of CVE-2023-42846 highlights the ongoing challenges in balancing device functionality with user privacy protection in mobile operating systems. Modern mobile devices rely heavily on network connectivity for various services, but this connectivity must not come at the expense of user privacy. The vulnerability serves as a reminder of the importance of proper network interface management and the need for operating system vendors to implement robust privacy controls by default. Security professionals should consider this vulnerability when conducting risk assessments for mobile environments and ensure that device management policies include mandatory updates for privacy-related patches. The fix represents a positive step toward improving user privacy protection while maintaining the essential network connectivity features that modern mobile applications require.