CVE-2025-24117 is a vulnerability identified in Apple’s iOS and iPadOS platforms, where an application can fingerprint a user by leveraging insufficient redaction of sensitive information. Fingerprinting here refers to the ability of an app to collect unique device or user characteristics that can be used to track or identify the user across sessions or apps without explicit consent. The root cause is linked to CWE-922, which involves improper restriction of operations within the bounds of a memory buffer or insufficient data redaction. This vulnerability does not require elevated privileges (PR:N) but does require user interaction (UI:R), such as launching or interacting with the malicious app. The attack vector is local (AV:L), meaning the attacker must have the app installed on the device. The vulnerability impacts confidentiality (C:H) by exposing sensitive user information that can be used for tracking, but it does not affect integrity or availability. Apple has addressed this issue by improving the redaction of sensitive information in the affected operating systems, releasing patches in iOS 18.3, iPadOS 18.3, iPadOS 17.7.4, macOS Sequoia 15.3, visionOS 2.3, and watchOS 11.3. No public exploits or active exploitation have been reported to date. The vulnerability highlights the ongoing challenges in protecting user privacy on mobile platforms, especially against sophisticated fingerprinting techniques that can bypass traditional permission models.

The primary impact of CVE-2025-24117 is on user privacy and confidentiality. By enabling apps to fingerprint users, attackers can track user behavior across apps and sessions without consent, potentially leading to profiling, targeted advertising, or more invasive privacy violations. For organizations, this can translate into compliance risks with privacy regulations such as GDPR or CCPA if user data is collected or processed without proper consent. Although the vulnerability does not directly compromise system integrity or availability, the erosion of user trust and potential regulatory penalties can have significant reputational and financial consequences. Enterprises deploying iOS and iPadOS devices, especially in sectors handling sensitive or regulated data (e.g., healthcare, finance), may face increased risk if users install untrusted apps. The requirement for user interaction and local app installation limits the scope somewhat, but the widespread use of Apple devices globally means the potential attack surface remains large. The vulnerability also underscores the need for vigilance against privacy-invasive techniques that do not rely on traditional exploit chains but rather on subtle data leakage.

1. Update all Apple devices to the latest patched versions: iOS 18.3, iPadOS 18.3, iPadOS 17.7.4, macOS Sequoia 15.3, visionOS 2.3, and watchOS 11.3 as soon as possible. 2. Restrict installation of apps to trusted sources only, such as the official Apple App Store, to reduce the risk of malicious apps exploiting this vulnerability. 3. Implement Mobile Device Management (MDM) policies that limit app permissions and monitor app behavior for suspicious fingerprinting activities. 4. Educate users about the risks of installing untrusted or unknown apps and the importance of applying system updates promptly. 5. Use privacy-enhancing settings and tools available in iOS/iPadOS to limit data sharing and tracking where possible. 6. Monitor network traffic and device logs for unusual patterns that may indicate fingerprinting or tracking attempts. 7. For organizations, conduct regular privacy impact assessments and ensure compliance with relevant data protection regulations to mitigate legal risks associated with user tracking.