Apple iOS and iPadOS Kernel Out-of-Bounds Write Vulnerability (CVE-2022-42827) Advisory
Executive & SecOps Summary
SECOPS ASSESSMENTApple devices running iOS and iPadOS versions prior to 15.7.1 or 16.1
A local application can exploit this vulnerability to execute arbitrary code with kernel privileges, leading to complete device compromise. Active exploitation has been reported in the wild
Immediately update affected devices to iOS/iPadOS 15.7.1, iOS 16.1, or later versions
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
The primary remediation is upgrading the operating system to a patched version. For enterprise environments, enforce updates using an MDM solution.
# Example MDM API call to force OS update on vulnerable devices
curl -X POST 'https://mdm.example.com/api/v1/commands' \
-H 'Authorization: Bearer ${MDM_API_TOKEN}' \
-H 'Content-Type: application/json' \
-d '{
"command": "ScheduleOSUpdate",
"target_device_ids": ["all_vulnerable_ios_devices"],
"update_strategy": "Default",
"product_version": "16.1"
}'2. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, restrict application installation and enforce strict configuration profiles via MDM to minimize the attack surface.
# Example MDM configuration profile snippet to restrict untrusted app installation
cat <<EOF > restrict_apps.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.example.restrictions</string>
<key>PayloadUUID</key>
<string>12345678-1234-1234-1234-1234567890ab</string>
<key>PayloadVersion</key>
<integer>1</integer>
<key>allowAppInstallation</key>
<false/>
</dict>
</array>
</dict>
</plist>
EOF3. Log Audit & IoC Verification Commands
Use the following Python script to parse your mobile asset inventory and identify devices running vulnerable iOS/iPadOS versions.
# Run audit script to identify vulnerable devices in the inventory
cat <<'EOF' > check_ios_version.py
import json
def check_vulnerability(device_list):
vulnerable_devices =
for device in device_list:
os_version = device.get('os_version', '0.0.0')
major, minor, patch = map(int, (os_version.split('.') +)[:3])
# Check iOS 15.x branch
if major == 15 and (minor < 7 or (minor == 7 and patch < 1)):
vulnerable_devices.append(device)
# Check iOS 16.x branch
elif major == 16 and minor < 1:
vulnerable_devices.append(device)
# Check older versions
elif major < 15:
vulnerable_devices.append(device)
return vulnerable_devices
# Sample inventory data
sample_devices = [
{'device_id': 'DEV-001', 'os_version': '15.6'},
{'device_id': 'DEV-002', 'os_version': '15.7.1'},
{'device_id': 'DEV-003', 'os_version': '16.0'}
]
print('Vulnerable Devices:', check_vulnerability(sample_devices))
EOF
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Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2022-42827) is an out-of-bounds write issue (CWE-787) residing within the kernel of Apple iOS and iPadOS. The root cause is a lack of proper bounds checking when writing data to kernel memory buffers. This allows an attacker to write data past the allocated boundary of a buffer, corrupting adjacent kernel memory.
2. Exploitation Mechanics & Attack Scenario
A local malicious application or a compromised process can trigger this vulnerability by passing crafted inputs to specific kernel system calls. By carefully manipulating the out-of-bounds write payload, the attacker can overwrite critical kernel data structures or function pointers. This bypasses the operating system's sandbox and escalates privileges from a standard user level to kernel-level privileges, enabling arbitrary code execution.
3. Infrastructure & Business Impact
As this vulnerability is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, it represents a highly critical threat that has been actively exploited in targeted attacks. Successful exploitation completely compromises the integrity of the device, allowing attackers to bypass security controls, access sensitive corporate data, monitor communications, and establish persistent access within the enterprise network.
Official Vendor Advisories & References
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.7.1 and iPadOS 15.7.1, iOS 16.1 and iPadOS 16. 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-2022-42827)
FAQQ1. How critical is CVE-2022-42827 and is it actively exploited in the wild?
CVE-2022-42827 is rated CVSS 7.8 (HIGH) with a 30-day EPSS exploitation probability of 1.1%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2022-42827?
Primary impacted vendors include apple across ios, ipados. Scope summary: All Apple devices running iOS and iPadOS versions prior to 15.7.1, and iOS 16 and iPadOS 16 prior to 16.1
Q3. What temporary mitigations or workarounds exist for CVE-2022-42827 before patching?
[Mitigation] Immediately update affected devices to iOS/iPadOS 15.7.1, iOS 16.1, or later versions 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-2022-42827
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