CVE-2024-44258: Apple iPadOS Path Traversal Vulnerability

CVE-2024-44258 Overview

CVE-2024-44258 is a symlink handling vulnerability affecting multiple Apple operating systems including iOS, iPadOS, tvOS, and visionOS. The vulnerability allows an attacker to modify protected system files by restoring a maliciously crafted backup file. Apple addressed this issue with improved handling of symlinks in the affected products.

Critical Impact

Restoring a maliciously crafted backup file may lead to modification of protected system files, potentially compromising device integrity and security controls.

Affected Products

• Apple iOS versions prior to 18.1 and 17.7.1
• Apple iPadOS versions prior to 18.1 and 17.7.1
• Apple tvOS versions prior to 18.1
• Apple visionOS versions prior to 2.1

Discovery Timeline

• October 28, 2024 - CVE-2024-44258 published to NVD
• November 3, 2025 - Last updated in NVD database

Technical Details for CVE-2024-44258

Vulnerability Analysis

This vulnerability is classified under CWE-59 (Improper Link Resolution Before File Access), commonly known as a symlink attack vulnerability. The flaw exists in how Apple's operating systems handle symbolic links during the backup restoration process. When a user restores a backup file that has been maliciously crafted to contain symbolic links, the system fails to properly validate and resolve these links before performing file operations.

The vulnerability requires local access and user interaction, meaning an attacker must convince a user to restore a malicious backup file. However, once triggered, the impact is significant as it allows modification of protected system files that would normally be inaccessible due to iOS's sandboxing and file system protections.

Root Cause

The root cause of CVE-2024-44258 lies in insufficient validation of symbolic links during the backup restoration process. Apple's backup and restore mechanism did not properly check whether symlinks in the backup archive pointed to protected system locations. This allowed maliciously crafted symlinks to traverse outside of intended directories and target sensitive system files during restoration operations.

Attack Vector

The attack requires local access and involves social engineering a victim to restore a compromised backup file. An attacker would need to:

1. Create a malicious backup file containing specially crafted symbolic links
2. Distribute this backup file to the target user through various means (phishing, malicious websites, or compromised backup services)
3. Convince the user to restore this backup file on their Apple device

Upon restoration, the symlinks resolve to protected system file locations, allowing the attacker to modify or overwrite critical system files. This could lead to persistence mechanisms, security control bypass, or denial of service conditions on the affected device.

The vulnerability mechanism involves crafting symbolic links within backup archives that point to protected system paths. When the backup restoration process extracts these files, it follows the symlinks without proper validation, writing attacker-controlled content to system-protected locations. For detailed technical analysis, refer to the Full Disclosure mailing list posts referenced in the security advisories.

Detection Methods for CVE-2024-44258

Indicators of Compromise

• Unexpected modifications to system configuration files following a backup restoration
• Presence of suspicious symbolic links in restored backup data
• System behavior anomalies after restoring backups from untrusted sources
• Unauthorized changes to protected file system areas

Detection Strategies

• Monitor backup restoration activities for unexpected file system operations in protected directories
• Implement file integrity monitoring on critical system files to detect unauthorized modifications
• Analyze restored backup contents for suspicious symlink patterns before full restoration
• Review system logs for file access violations or permission errors during restoration processes

Monitoring Recommendations

• Enable comprehensive logging for backup and restore operations on managed Apple devices
• Configure Mobile Device Management (MDM) solutions to alert on backup restoration events
• Implement SentinelOne's mobile threat defense capabilities to detect post-exploitation activities
• Establish baselines for system file integrity and monitor for deviations

How to Mitigate CVE-2024-44258

Immediate Actions Required

• Update all affected Apple devices to iOS 18.1, iPadOS 18.1, tvOS 18.1, or visionOS 2.1 or later
• Avoid restoring backups from untrusted or unknown sources
• Verify the integrity of backup files before restoration through MDM solutions
• Educate users about the risks of restoring backups from unverified sources

Patch Information

Apple has released security updates to address this vulnerability. Organizations should deploy these patches immediately across their Apple device fleet:

• iOS 18.1 and iPadOS 18.1: See Apple Support Document #121563
• iOS 17.7.1 and iPadOS 17.7.1: See Apple Support Document #121567
• tvOS 18.1: See Apple Support Document #121569
• visionOS 2.1: See Apple Support Document #121566

Workarounds

• Restrict backup restoration capabilities to administrator-approved backups only via MDM policies
• Implement device supervision to control backup and restore functionality
• Use corporate-managed backup solutions that validate backup integrity before restoration
• Consider disabling local backup restoration on high-security devices until patches can be applied

# MDM Configuration Profile Example (conceptual)
# Restrict backup restoration to managed backups only
# Deploy via your MDM solution
# Key: allowBackupRestore
# Value: false (for maximum restriction)
# Or implement backup validation policies through your MDM console