CVE-2022-22587: Apple iPadOS RCE Vulnerability

CVE-2022-22587 Overview

CVE-2022-22587 is a critical memory corruption vulnerability affecting Apple's iOS, iPadOS, and macOS operating systems. The vulnerability exists in the kernel and stems from improper input validation, which can be exploited by a malicious application to execute arbitrary code with kernel privileges. Apple has confirmed that this vulnerability has been actively exploited in the wild, and it has been added to CISA's Known Exploited Vulnerabilities (KEV) catalog.

Critical Impact

This vulnerability enables kernel-level code execution, allowing attackers to completely compromise affected Apple devices. Active exploitation has been confirmed in the wild.

Affected Products

• Apple iOS versions prior to 15.3
• Apple iPadOS versions prior to 15.3
• Apple macOS Big Sur versions prior to 11.6.3
• Apple macOS Monterey versions prior to 12.2

Discovery Timeline

• 2022-03-18 - CVE-2022-22587 published to NVD
• 2025-10-23 - Last updated in NVD database

Technical Details for CVE-2022-22587

Vulnerability Analysis

CVE-2022-22587 is classified as CWE-787 (Out-of-Bounds Write), a severe memory corruption vulnerability in Apple's kernel. The flaw occurs due to insufficient input validation in kernel-level operations, allowing an attacker to write data beyond the intended memory boundaries. This type of vulnerability is particularly dangerous as it operates at the kernel level, the most privileged layer of the operating system.

When successfully exploited, the out-of-bounds write condition can be leveraged to corrupt critical kernel data structures, potentially allowing an attacker to hijack execution flow and gain complete control over the affected device. The network-based attack vector means exploitation can potentially occur remotely under certain conditions.

Root Cause

The root cause of this vulnerability is improper input validation within Apple's kernel code. When processing certain inputs, the kernel fails to properly validate boundary conditions before writing data to memory. This allows carefully crafted inputs to trigger an out-of-bounds write condition, corrupting adjacent memory regions that may contain critical kernel data structures or function pointers.

Attack Vector

The vulnerability can be exploited through a malicious application running on the target device. An attacker could craft a malicious app that:

1. Prepares specially crafted input data designed to trigger the memory corruption
2. Invokes the vulnerable kernel functionality
3. Exploits the out-of-bounds write to corrupt kernel memory
4. Gains arbitrary code execution with kernel privileges
5. Achieves complete device compromise

The vulnerability mechanism involves memory corruption through improper boundary checking in kernel-level input processing. Technical exploitation details involve triggering the out-of-bounds write condition with carefully controlled data to achieve code execution. For detailed technical analysis, refer to Apple Support Document HT213053.

Detection Methods for CVE-2022-22587

Indicators of Compromise

• Unexpected kernel panics or system crashes on Apple devices
• Unusual process behavior with elevated privileges on iOS/iPadOS/macOS systems
• Suspicious applications attempting kernel-level operations
• Memory corruption artifacts in system crash logs

Detection Strategies

• Monitor for applications exhibiting unusual kernel interaction patterns
• Implement endpoint detection solutions capable of identifying kernel exploitation attempts
• Review system logs for evidence of privilege escalation to kernel level
• Deploy behavioral analysis to detect malicious applications prior to exploitation

Monitoring Recommendations

• Enable comprehensive logging on Apple devices through MDM solutions
• Monitor for installation of applications from untrusted sources
• Implement network traffic analysis to detect potential command and control communications
• Regularly review device health status for signs of compromise

How to Mitigate CVE-2022-22587

Immediate Actions Required

• Update all iOS devices to version 15.3 or later immediately
• Update all iPadOS devices to version 15.3 or later
• Update macOS Big Sur systems to version 11.6.3 or later
• Update macOS Monterey systems to version 12.2 or later
• Prioritize patching as this vulnerability is confirmed actively exploited

Patch Information

Apple has addressed this vulnerability through improved input validation in the kernel. Security updates are available through the following resources:

• Apple Support Document HT213053 - iOS 15.3 and iPadOS 15.3
• Apple Support Document HT213054 - macOS Monterey 12.2
• Apple Support Document HT213055 - macOS Big Sur 11.6.3

This vulnerability is listed in the CISA Known Exploited Vulnerabilities Catalog, requiring federal agencies to remediate by the specified deadline.

Workarounds

• Restrict installation of applications to trusted sources only (App Store)
• Implement Mobile Device Management (MDM) policies to control application installation
• Enable automatic updates on all Apple devices to ensure timely patch deployment
• Consider network segmentation for unpatched devices until updates can be applied

# Check current iOS/iPadOS version via command line (macOS)
system_profiler SPSoftwareDataType | grep "System Version"

# Verify macOS version
sw_vers -productVersion

# Force software update check on macOS
softwareupdate --list