CVE-2025-31208: Apple iPadOS DOS Vulnerability

CVE-2025-31208 Overview

CVE-2025-31208 is an improper input validation vulnerability affecting multiple Apple operating systems, including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. The vulnerability exists in the file parsing functionality and can be exploited remotely without authentication. When a maliciously crafted file is parsed, it can cause an unexpected application termination, resulting in a denial of service condition. Apple addressed this issue through improved validation checks in their May 2025 security updates.

Critical Impact

Remote attackers can cause application crashes across the entire Apple ecosystem by delivering specially crafted files, potentially disrupting critical workflows and user productivity without requiring any authentication or user privileges.

Affected Products

• Apple iOS 18.x (versions prior to 18.5)
• Apple iPadOS 17.x (versions prior to 17.7.7) and 18.x (versions prior to 18.5)
• Apple macOS Ventura (versions prior to 13.7.6), Sonoma (versions prior to 14.7.6), and Sequoia (versions prior to 15.5)
• Apple tvOS (versions prior to 18.5)
• Apple visionOS (versions prior to 2.5)
• Apple watchOS (versions prior to 11.5)

Discovery Timeline

• May 12, 2025 - CVE-2025-31208 published to NVD
• April 2, 2026 - Last updated in NVD database

Technical Details for CVE-2025-31208

Vulnerability Analysis

This vulnerability stems from improper input validation (CWE-20) in Apple's file parsing routines. The flaw allows an attacker to craft a malicious file that, when processed by any affected Apple application, triggers an unhandled exception leading to application termination. The attack requires no authentication or special privileges, making it particularly dangerous in enterprise environments where file sharing is common.

The vulnerability is remotely exploitable over the network, and the attack complexity is low. An attacker does not need any prior privileges or user interaction to successfully exploit this vulnerability. The impact is limited to availability—there is no evidence that the vulnerability allows for information disclosure or system integrity compromise. However, the widespread nature of the affected platforms means that a single malicious file could potentially disrupt services across iPhones, iPads, Macs, Apple TVs, Apple Watches, and Vision Pro devices.

Root Cause

The root cause of CVE-2025-31208 lies in insufficient validation checks within Apple's file parsing code. When processing file contents, the affected components fail to properly validate input boundaries or data structures, allowing malformed data to reach code paths that cannot handle unexpected values. This results in an unhandled exception that terminates the application.

Apple's fix implements "improved checks" to properly validate file contents before processing, ensuring that malformed or malicious data is rejected before it can trigger the crash condition.

Attack Vector

The attack vector for this vulnerability is network-based, allowing remote exploitation. An attacker can deliver the malicious file through various channels including email attachments, file sharing services, messaging applications, or by hosting the file on a web server and enticing users to download it.

The exploitation scenario involves delivering a crafted file that exploits the parsing vulnerability. When the target device attempts to process this file—whether through preview generation, file indexing, or explicit opening—the parsing code encounters the malicious content and crashes.

Since the vulnerability requires no user interaction beyond normal file handling operations, even automated processes like email preview generation or cloud file synchronization could trigger the vulnerability.

Detection Methods for CVE-2025-31208

Indicators of Compromise

• Unexpected and repeated application crashes when processing files from untrusted sources
• Crash logs referencing file parsing or media handling frameworks
• Files with unusual or malformed headers that deviate from expected format specifications
• Multiple application termination events occurring in quick succession

Detection Strategies

• Monitor system crash logs for patterns indicating file parsing failures across affected Apple applications
• Implement file integrity monitoring to detect potentially malicious files entering the environment
• Deploy endpoint detection and response (EDR) solutions that can identify denial of service attack patterns
• Use SentinelOne's behavioral AI to detect abnormal application termination patterns

Monitoring Recommendations

• Configure crash reporting and analysis to identify exploitation attempts in real-time
• Monitor network traffic for suspicious file transfers targeting Apple devices
• Implement centralized logging for application crashes across managed Apple devices
• Review Mobile Device Management (MDM) logs for patterns of application instability

How to Mitigate CVE-2025-31208

Immediate Actions Required

• Update all Apple devices to the patched versions: iOS 18.5, iPadOS 18.5/17.7.7, macOS Sequoia 15.5, macOS Sonoma 14.7.6, macOS Ventura 13.7.6, tvOS 18.5, visionOS 2.5, and watchOS 11.5
• Enable automatic updates on all managed Apple devices to ensure timely patch deployment
• Implement email and web filtering to scan for potentially malicious files before they reach endpoints
• Educate users about the risks of opening files from untrusted sources

Patch Information

Apple has released security updates addressing this vulnerability across all affected platforms. The patches implement improved validation checks to prevent the file parsing crash. Detailed patch information is available through Apple's official security advisories:

• Apple Support Document #122404 - iOS and iPadOS 18.5
• Apple Support Document #122405 - iPadOS 17.7.7
• Apple Support Document #122716 - macOS Sequoia 15.5
• Apple Support Document #122717 - macOS Sonoma 14.7.6
• Apple Support Document #122718 - macOS Ventura 13.7.6
• Apple Support Document #122720 - tvOS 18.5
• Apple Support Document #122721 - visionOS 2.5
• Apple Support Document #122722 - watchOS 11.5

Workarounds

• Restrict file downloads from untrusted sources using network security policies
• Disable automatic file preview generation where possible to reduce attack surface
• Implement application sandboxing and containerization to limit the impact of crashes
• Use content filtering gateways to inspect and quarantine suspicious files before delivery to endpoints

# For macOS - Check current OS version and available updates
softwareupdate --list

# Apply all available security updates
softwareupdate --install --all --restart

# For enterprise environments - Use MDM to enforce update policies
# Example: Jamf Pro command to push updates
jamf policy -event update_macos