CVE-2025-31199 Overview
CVE-2025-31199 is a logging issue discovered in multiple Apple operating systems that could allow a malicious application to access sensitive user data. The vulnerability stems from insufficient data redaction in system logging mechanisms, where sensitive information was not properly sanitized before being written to log files. Apple has addressed this vulnerability with improved data redaction in their April 2025 security updates.
Critical Impact
A malicious application running on affected devices could gain unauthorized access to sensitive user data through improperly redacted system logs.
Affected Products
- Apple iOS (versions prior to 18.4)
- Apple iPadOS (versions prior to 18.4)
- Apple macOS Sequoia (versions prior to 15.4)
- Apple visionOS (versions prior to 2.4)
Discovery Timeline
- 2025-05-29 - CVE-2025-31199 published to NVD
- 2025-06-02 - Last updated in NVD database
Technical Details for CVE-2025-31199
Vulnerability Analysis
This vulnerability is classified under CWE-532 (Insertion of Sensitive Information into Log File), a common security weakness where applications or systems inadvertently write sensitive data to log files without proper sanitization. In the context of Apple's operating systems, this logging issue affects the data redaction mechanisms that should protect sensitive user information from being exposed in system logs.
The vulnerability requires local access and user interaction to exploit, indicating that an attacker would need to convince a user to install a malicious application. Once installed, the application could potentially read log files containing improperly redacted sensitive user data, leading to confidentiality breaches. The impact is confined to data exposure without affecting system integrity or availability.
Root Cause
The root cause of CVE-2025-31199 lies in inadequate data redaction logic within Apple's logging subsystem. When sensitive user data was processed by various system components, the logging mechanisms failed to properly sanitize or mask this information before writing it to log files. This oversight allowed sensitive data to persist in plaintext within accessible log storage locations, creating an opportunity for malicious applications with appropriate permissions to harvest this information.
Attack Vector
The attack vector for this vulnerability is local, requiring an attacker to have a malicious application installed on the target device. The exploitation scenario involves the following steps:
- The attacker distributes a malicious application, potentially through social engineering or by disguising it as a legitimate app
- The user installs and runs the malicious application on their iOS, iPadOS, macOS, or visionOS device
- The malicious app accesses system log files where sensitive user data has been improperly redacted
- The application exfiltrates the exposed sensitive information to the attacker
This vulnerability does not require elevated privileges for exploitation, though it does require user interaction to install the malicious application. The attack complexity is low once the initial installation is achieved.
Detection Methods for CVE-2025-31199
Indicators of Compromise
- Unusual applications requesting access to system logs or diagnostic data
- Applications with excessive file system access permissions reading from logging directories
- Unexpected network traffic from installed applications potentially exfiltrating log data
- Presence of unknown or suspicious applications not installed through official App Store channels
Detection Strategies
- Monitor for applications attempting to read system log files or diagnostic directories
- Implement application allowlisting to prevent unauthorized software installation
- Review installed applications for suspicious permission requests, particularly those involving diagnostic or logging access
- Deploy endpoint detection solutions capable of monitoring file access patterns to sensitive system directories
Monitoring Recommendations
- Enable enhanced logging for file system access events on critical directories
- Configure SentinelOne agents to alert on suspicious application behavior patterns related to log file access
- Regularly audit installed applications across managed devices for unauthorized software
- Monitor for network connections from applications that should not require external communication
How to Mitigate CVE-2025-31199
Immediate Actions Required
- Update all Apple devices to the latest operating system versions: iOS 18.4, iPadOS 18.4, macOS Sequoia 15.4, or visionOS 2.4
- Review installed applications and remove any suspicious or unauthorized software
- Enable automatic updates on all Apple devices to ensure timely security patch deployment
- Educate users about the risks of installing applications from unknown sources
Patch Information
Apple has released security updates addressing this vulnerability across multiple platforms. The fixes are included in iOS 18.4 and iPadOS 18.4, macOS Sequoia 15.4, and visionOS 2.4. Organizations should prioritize deploying these updates to all managed Apple devices. For detailed patch information, refer to the official Apple security advisories:
Workarounds
- Restrict application installations to only those from the official App Store
- Implement Mobile Device Management (MDM) policies to control application deployment
- Limit user permissions to prevent installation of unauthorized applications
- Consider network segmentation to limit potential data exfiltration paths from compromised devices
# Example MDM configuration to restrict app installations (conceptual)
# Consult your MDM solution documentation for specific implementation
# Enable App Store restriction
mdm_policy set allowAppInstallation=false
mdm_policy set allowAppStoreOnly=true
# Enable automatic updates
mdm_policy set autoUpdateEnabled=true
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
