CVE-2025-31279: Apple iPadOS Information Disclosure Flaw

CVE-2025-31279 Overview

CVE-2025-31279 is a permissions issue affecting Apple macOS and iPadOS that allows an application to fingerprint the user. This vulnerability stems from insufficient access restrictions that enable malicious apps to gather unique identifiers or device characteristics, potentially compromising user privacy across browsing sessions and applications. Apple has addressed this issue by implementing additional restrictions in the affected operating systems.

Critical Impact

A malicious application can exploit this permissions flaw to fingerprint users, enabling persistent tracking across sessions and potential privacy violations on affected Apple devices.

Affected Products

• Apple macOS Sequoia (versions prior to 15.6)
• Apple macOS Sonoma (versions prior to 14.7.7)
• Apple macOS Ventura (versions prior to 13.7.7)
• Apple iPadOS (versions prior to 17.7.9)

Discovery Timeline

• July 30, 2025 - CVE-2025-31279 published to NVD
• November 3, 2025 - Last updated in NVD database

Technical Details for CVE-2025-31279

Vulnerability Analysis

This vulnerability is classified under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). The permissions issue allows applications to access system resources or data that can be used to uniquely identify users. User fingerprinting techniques typically leverage combinations of device characteristics, installed software, system configurations, or hardware identifiers to create a persistent identifier that remains consistent across sessions.

In the context of Apple's macOS and iPadOS, the vulnerability indicates that the operating system's permission model failed to adequately restrict access to certain system attributes or APIs that could be combined to create a unique fingerprint. This could include information such as installed fonts, system preferences, hardware identifiers, or other device-specific characteristics that should be protected from application-level access.

Root Cause

The root cause of CVE-2025-31279 is inadequate permission enforcement within the operating system's access control mechanisms. The vulnerability exists because applications were granted access to system information or APIs that, when combined, enable user fingerprinting. Apple's fix addresses this by implementing "additional restrictions" to limit what data applications can access without explicit user consent.

Attack Vector

The attack vector for this vulnerability is network-based, though exploitation requires a malicious application to be installed on the target device. An attacker could distribute a seemingly benign application through various channels that, once installed, silently collects fingerprinting data. This data can then be exfiltrated to remote servers for tracking purposes.

The exploitation process involves:

1. Distribution of a malicious application to the target device
2. The application leveraging the permissions flaw to access restricted system information
3. Aggregation of collected data points to create a unique user fingerprint
4. Potential exfiltration of the fingerprint data for tracking across sessions or platforms

Since no verified code examples are available for this vulnerability, organizations should refer to the Full Disclosure Mailing List postings for additional technical details on the exploitation mechanism.

Detection Methods for CVE-2025-31279

Indicators of Compromise

• Applications making unusual system API calls to gather device characteristics or hardware identifiers
• Processes accessing protected system configuration files or preference stores without legitimate business need
• Network traffic patterns showing exfiltration of device fingerprinting data to external servers
• Suspicious applications installed from unofficial sources or sideloaded onto devices

Detection Strategies

• Monitor for applications accessing system APIs commonly used for fingerprinting, such as font enumeration, hardware identifier queries, or system configuration reads
• Implement endpoint detection rules to identify applications that aggregate multiple system attributes in rapid succession
• Review application entitlements and permissions to identify apps requesting unnecessary access to system information
• Deploy network monitoring to detect data exfiltration patterns consistent with fingerprinting data transmission

Monitoring Recommendations

• Enable enhanced logging on macOS and iPadOS devices to capture application permission requests and system API access
• Utilize SentinelOne's behavioral AI engine to detect anomalous application behaviors indicative of fingerprinting attempts
• Monitor for applications that persist unique identifiers or device characteristics to local storage or transmit them externally
• Implement Mobile Device Management (MDM) policies to restrict installation of applications from untrusted sources

How to Mitigate CVE-2025-31279

Immediate Actions Required

• Update all affected macOS devices to version 15.6 (Sequoia), 14.7.7 (Sonoma), or 13.7.7 (Ventura) immediately
• Update all affected iPadOS devices to version 17.7.9 or later
• Review installed applications on affected devices and remove any untrusted or unnecessary software
• Enable automatic updates to ensure timely application of future security patches

Patch Information

Apple has released security updates that address this vulnerability by implementing additional restrictions on application access to system information. The following versions contain the fix:

• macOS Sequoia 15.6 - Apple Support Article #124148
• macOS Sonoma 14.7.7 - Apple Support Article #124149
• macOS Ventura 13.7.7 - Apple Support Article #124150
• iPadOS 17.7.9 - Apple Support Article #124151

Organizations should prioritize deployment of these updates across all managed Apple devices.

Workarounds

• Restrict application installation to only Apple App Store applications until patches can be applied
• Implement MDM policies to limit application permissions and access to system resources
• Isolate unpatched devices from sensitive networks to minimize potential data exposure
• Review and audit existing applications for suspicious permission requests or behaviors

# Check current macOS version
sw_vers -productVersion

# Check for available system updates
softwareupdate --list

# Install all available updates
softwareupdate --install --all