Apple iOS, iPadOS, and macOS IOSurfaceAccelerator Out-of-Bounds Write Vulnerability (CVE-2023-28206) Analysis and Mitigation Guide
Executive & SecOps Summary
SECOPS ASSESSMENTiOS and iPadOS versions prior to 15.7.5 / 16.4.1, macOS Big Sur prior to 11.7.6, Monterey prior to 12.6.5, and Ventura prior to 13.3.1
A local application can execute arbitrary code with kernel privileges, leading to complete system compromise. This vulnerability is actively exploited in the wild
Immediately apply the official security updates provided by Apple (e.g., iOS 16.4.1, macOS 13.3.1)
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Apply the official security patches immediately. For enterprise macOS fleets managed via terminal or MDM, run the following command to force system updates:
# Check and install all available software updates and restart the macOS device
sudo softwareupdate --install --all --restart2. Temporary Workaround & Hardening Configuration
Because this is a kernel-level vulnerability, there is no complete workaround other than a full OS update. To minimize risk, enforce Gatekeeper to prevent unauthorized application execution:
# Enforce Gatekeeper to allow apps only from the App Store and identified developers
sudo spctl --master-enable3. Log Audit & IoC Verification Commands
Use the following commands to verify the current operating system version and determine if the system is running a vulnerable version:
# Retrieve the current macOS version and build number
sw_vers
# Check the running kernel details
uname -aBlock 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-2023-28206) is an out-of-bounds write issue (CWE-787) residing in the IOSurfaceAccelerator component, which handles graphics and media acceleration across Apple operating systems. The root cause is insufficient input validation when processing user-supplied data, allowing an application to write data past the allocated boundary of a memory buffer in the kernel space.
2. Exploitation Mechanics & Attack Scenario
An attacker exploits this vulnerability by executing a specially crafted application on the target device. By passing malicious inputs to the IOSurfaceAccelerator APIs, the application triggers an out-of-bounds write in the kernel memory. This corrupts critical kernel structures, enabling the attacker to hijack the execution flow and run arbitrary code with elevated kernel privileges, bypassing sandbox restrictions.
3. Infrastructure & Business Impact
As this vulnerability is listed in the CISA KEV catalog, there is a high risk of active exploitation targeting enterprise endpoints. Successful exploitation grants full control over the affected device, allowing attackers to exfiltrate sensitive corporate data, access credentials stored in the keychain, and establish persistent access within the enterprise network.
Official Vendor Advisories & References
An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in macOS Monterey 12.6.5, iOS 16.4.1 and iPadOS 16.4.1, macOS Ventura 13.3.1, iOS 15.7.5 and iPadOS 15.7.5, macOS Big Sur 11.7.6. An app 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-2023-28206)
FAQQ1. How critical is CVE-2023-28206 and is it actively exploited in the wild?
CVE-2023-28206 is rated CVSS 8.6 (HIGH) with a 30-day EPSS exploitation probability of 23.2%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2023-28206?
Primary impacted vendors include apple across macos, ios, ipados. Scope summary: iOS and iPadOS prior to 16.4.1, iOS and iPadOS prior to 15.7.5, macOS Ventura prior to 13.3.1, macOS Monterey prior to 12.6.5, and macOS Big Sur prior to 11.7.6
Q3. What temporary mitigations or workarounds exist for CVE-2023-28206 before patching?
[Mitigation] Immediately apply the official security updates provided by Apple (e.g., iOS 16.4.1, macOS 13.3.1) 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-2023-28206
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🔗 Related Advisories in Similar Stack (apple)
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