CVE-2022-22635 – CVE-2022-22635 is an out-of-bounds write vulner... (How to Fix)

Q: What is the severity of CVE-2022-22635?

CVE-2022-22635 has a CVSS score of 9.8 (CRITICAL). CVE-2022-22635 is an out-of-bounds write vulnerability in Apple's iOS, iPadOS, and tvOS that allows malicious applications to write beyond allocated memory boundaries. This can lead to arbitrary code execution with elevated privileges, potentially allowing attackers to gain full control of affected devices. All users running vulnerable versions of these Apple operating systems are affected.

📋 TL;DR

CVE-2022-22635 is an out-of-bounds write vulnerability in Apple's iOS, iPadOS, and tvOS that allows malicious applications to write beyond allocated memory boundaries. This can lead to arbitrary code execution with elevated privileges, potentially allowing attackers to gain full control of affected devices. All users running vulnerable versions of these Apple operating systems are affected.

💻 Affected Systems

Products:

iOS
iPadOS
tvOS

Versions: Versions prior to 15.4

Operating Systems: iOS, iPadOS, tvOS

Default Config Vulnerable: ⚠️ Yes

Notes: All devices running affected versions are vulnerable by default. No special configuration required for exploitation.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete device compromise with kernel-level privileges, allowing attackers to install persistent malware, steal sensitive data, and use the device as a foothold for lateral movement in enterprise networks.

🟠

Likely Case

Malicious apps from untrusted sources gaining elevated privileges to bypass sandbox restrictions, access sensitive user data, and potentially install additional payloads.

🟢

If Mitigated

Limited impact with proper app vetting and security controls, though the vulnerability still presents significant risk if exploited.

🌐 Internet-Facing: MEDIUM

🏢 Internal Only: HIGH

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires a malicious application to be installed on the target device. The vulnerability is in the operating system kernel, making exploitation non-trivial but feasible for skilled attackers.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: iOS 15.4, iPadOS 15.4, tvOS 15.4

Vendor Advisory: https://support.apple.com/en-us/HT213182

Restart Required: Yes

Instructions:

1. Open Settings app. 2. Go to General > Software Update. 3. Download and install iOS/iPadOS 15.4 or tvOS 15.4. 4. Restart device when prompted.

🔧 Temporary Workarounds

Restrict App Installation

all

Only allow installation of apps from trusted sources like the App Store

Settings > General > Device Management > Enable restrictions

🧯 If You Can't Patch

Isolate affected devices from critical network segments
Implement strict application allowlisting policies

🔍 How to Verify

Check if Vulnerable:

Check device version in Settings > General > About > Software Version

Check Version:

Settings > General > About > Software Version

Verify Fix Applied:

Verify version is 15.4 or later in Settings > General > About > Software Version

📡 Detection & Monitoring

Log Indicators:

Unexpected privilege escalation events
Kernel panic logs
Unusual app behavior

Network Indicators:

Unusual outbound connections from mobile devices
Traffic to known malicious domains

SIEM Query:

source="apple-device-logs" AND (event_type="privilege_escalation" OR kernel_panic="true")

📊 Metadata

CVE ID: CVE-2022-22635

CVSS v3 Score: 9.8 (CRITICAL)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-787

Published: March 18, 2022

Last Updated: November 21, 2024

🔗 References

https://support.apple.com/en-us/HT213182 Vendor Advisory
https://support.apple.com/en-us/HT213186 Vendor Advisory
https://support.apple.com/en-us/HT213182 Vendor Advisory
https://support.apple.com/en-us/HT213186 Vendor Advisory

📤 Share & Export

📄 Export Markdown 📋 Export JSON

🔗 Related Vulnerabilities

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