Apple macOS and iOS Kernel Out-of-Bounds Write Local Privilege Escalation Vulnerability (CVE-2022-32917)
Executive & SecOps Summary
SECOPS ASSESSMENTSystems running macOS Big Sur prior to 11.7, macOS Monterey prior to 12.6, iOS/iPadOS prior to 15.7, and iOS prior to 16
A local attacker can execute arbitrary code with kernel privileges, leading to complete system compromise. Active exploitation in the wild has been reported
Immediately apply the official security updates provided by Apple (macOS Monterey 12.6, Big Sur 11.7, iOS 15.7/16, iPadOS 15.7 or later)
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Apply the official security updates from Apple to ensure that improved bounds checks are implemented in the kernel.
For macOS endpoints, you can force the software update via the terminal:
# List available software updates
softwareupdate -l
# Install macOS Monterey 12.6 or Big Sur 11.7 update and restart immediately
sudo softwareupdate -i -a --restart2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, restrict the execution of untrusted third-party applications and enforce strict device policies via MDM (Mobile Device Management) solutions.
Enable and harden Gatekeeper on macOS to prevent unauthorized application execution:
# Enable Gatekeeper to allow only App Store and identified developer apps
sudo spctl --master-enable3. Log Audit & IoC Verification Commands
Use the following script to audit the current operating system version and verify if the system is vulnerable.
Shell script to check the current macOS version and build:
#!/bin/bash
os_version=$(sw_vers -productVersion)
os_build=$(sw_vers -buildVersion)
echo 'Current macOS Version: '$os_version
echo 'Current Build: '$os_build
# Check if the version is vulnerable (example for Monterey)
if [[ '$os_version' == 12.* ]]; then
major=$(echo $os_version | cut -d. -f1)
minor=$(echo $os_version | cut -d. -f2)
if [ '$minor' -lt 6 ]; then
echo '[WARNING] This system is vulnerable. Please update to macOS Monterey 12.6 or higher.'
else
echo '[SAFE] System is patched.'
fi
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Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2022-32917) is an out-of-bounds write issue (CWE-787) residing within the Apple operating system kernel. The root cause is insufficient bounds checking when writing data to kernel memory buffers. Due to this lack of validation, the kernel fails to verify the size or index of the input data, allowing memory writes to extend beyond the allocated buffer boundaries.
2. Exploitation Mechanics & Attack Scenario
To exploit this vulnerability, an attacker must first gain local access or execute a malicious application with standard user privileges on the target device. By invoking specific system calls or kernel APIs with crafted arguments, the attacker triggers the out-of-bounds write to overwrite critical kernel data structures or function pointers in memory. This manipulation redirects the execution flow, allowing the attacker to run arbitrary payloads with kernel-level privileges (Ring 0). Apple has acknowledged reports that this vulnerability has been actively exploited in the wild.
3. Infrastructure & Business Impact
Arbitrary code execution with kernel privileges completely bypasses all operating system security controls, including sandboxing and privilege isolation. An attacker can gain unrestricted access to all sensitive data, install persistent backdoors, disable security agents, and deploy additional malware. In an enterprise environment, compromised macOS endpoints or iOS devices can serve as initial access points for lateral movement within the corporate network.
Official Vendor Advisories & References
The issue was addressed with improved bounds checks. This issue is fixed in macOS Monterey 12.6, iOS 15.7 and iPadOS 15.7, iOS 16, macOS Big Sur 11.7. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited..
Frequently Asked SecOps Questions (CVE-2022-32917)
FAQQ1. How critical is CVE-2022-32917 and is it actively exploited in the wild?
CVE-2022-32917 is rated CVSS 7.8 (HIGH) with a 30-day EPSS exploitation probability of 5.6%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2022-32917?
Primary impacted vendors include apple across macos, ios, ipados. Scope summary: macOS Big Sur prior to 11.7, macOS Monterey prior to 12.6, iOS 15.7 and iPadOS 15.7 prior to 15.7, and iOS prior to 16
Q3. What temporary mitigations or workarounds exist for CVE-2022-32917 before patching?
[Mitigation] Immediately apply the official security updates provided by Apple (macOS Monterey 12.6, Big Sur 11.7, iOS 15.7/16, iPadOS 15.7 or later) Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
Generate an Internal Engineering Notice or CISO Report for CVE-2022-32917
Instantly format this advisory into an executive CISO summary or engineering patch ticket.
🔗 Related Advisories in Similar Stack (apple)
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