Apple iOS and iPadOS Kernel Privilege Escalation Vulnerability (CVE-2023-42824) Security Advisory
Executive & SecOps Summary
SECOPS ASSESSMENTiPhone and iPad devices running iOS 16.6 and prior
A local attacker can bypass sandbox restrictions to elevate privileges to kernel level, leading to complete device compromise
Immediately update affected devices to iOS 16.7.1 / iPadOS 16.7.1 or later
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
The primary remediation is upgrading the operating system to iOS/iPadOS 16.7.1 or later. For enterprise environments, administrators can enforce OS updates across managed devices using MDM APIs.
# Example API call to trigger an immediate OS update via an MDM server
curl -X POST 'https://mdm.enterprise.com/api/v1/commands' \
-H 'Authorization: Bearer ENTERPRISE_MDM_TOKEN' \
-H 'Content-Type: application/json' \
-d '{
"command": "ScheduleOSUpdate",
"target_device_uuids": ["device-uuid-001", "device-uuid-002"],
"update_policy": "Default",
"product_version": "16.7.1"
}'2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, enable 'Lockdown Mode' on high-risk devices to reduce the attack surface. Additionally, deploy MDM configuration profiles to restrict the installation of unapproved configuration profiles and apps.
# Example configuration profile payload to restrict manual profile installation
cat <<EOF > restriction_profile.mobileconfig
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE plist PUBLIC '-//Apple//DTD PLIST 1.0//EN' 'http://www.apple.com/DTDs/PropertyList-1.0.dtd'>
<plist version='1.0'>
<dict>
<key>PayloadContent</key>
<array>
<dict>
<key>PayloadType</key>
<string>com.apple.applicationaccess</string>
<key>PayloadIdentifier</key>
<string>com.enterprise.restrictions</string>
<key>PayloadUUID</key>
<string>12345678-1234-1234-1234-1234567890AB</string>
<key>PayloadVersion</key>
<integer>1</integer>
<key>allowUIConfigurationProfileInstallation</key>
<false/>
</dict>
</array>
</dict>
</plist>
EOF3. Log Audit & IoC Verification Commands
Utilize mobile forensics and verification tools (such as Mobile Verification Toolkit - MVT) to inspect backup files and system logs for known indicators of compromise (IoCs) associated with active spyware campaigns.
Block Kernel Privilege Escalation & Ransomware Payloads Before You Can Reboot
Protect unpatched Windows, Linux, and macOS workloads against in-memory exploitation and lateral movement with autonomous EDR.
Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2023-42824) exists within the kernel of Apple iOS and iPadOS. The root cause stems from insufficient input validation and improper memory management when handling specific system calls. A local attacker can exploit this flaw to bypass memory boundaries and access restricted kernel space. Apple addressed this issue by implementing improved state checks and validation mechanisms.
2. Exploitation Mechanics & Attack Scenario
An attacker initiates the exploit via a local process or a malicious application already running on the target device. By sending crafted system calls designed to corrupt kernel memory structures, the attacker triggers the vulnerability to escalate privileges to the kernel level. This vulnerability has been actively exploited in the wild against iOS versions prior to iOS 16.6, often as part of a multi-stage exploit chain to deploy highly targeted spyware.
3. Infrastructure & Business Impact
Kernel-level privilege escalation completely undermines the operating system's security model. Once kernel access is achieved, the attacker can bypass all application sandboxing, access sensitive data stored in the Keychain, intercept enterprise communications, and compromise corporate credentials. In an enterprise environment, compromised mobile endpoints can serve as a primary vector for lateral movement into internal networks.
Official Vendor Advisories & References
The issue was addressed with improved checks. This issue is fixed in iOS 16.7.1 and iPadOS 16.7.1. A local attacker may be able to elevate their privileges. Apple is aware of a report that this issue may have been actively exploited against versions of iOS before iOS 16.6.
Frequently Asked SecOps Questions (CVE-2023-42824)
FAQQ1. How critical is CVE-2023-42824 and is it actively exploited in the wild?
CVE-2023-42824 is rated CVSS 7.8 (HIGH) with a 30-day EPSS exploitation probability of 1.0%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2023-42824?
Primary impacted vendors include apple across ios, ipados. Scope summary: All iOS and iPadOS versions prior to 16.7.1 (Active exploitation reported on iOS 16.6 and earlier)
Q3. What temporary mitigations or workarounds exist for CVE-2023-42824 before patching?
[Mitigation] Immediately update affected devices to iOS 16.7.1 / iPadOS 16.7.1 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-2023-42824
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