CVE-2018-4407 in macOS
Summary
by MITRE
A memory corruption issue was addressed with improved validation. This issue affected versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, watchOS 5.
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Analysis
by VulDB Data Team • 07/24/2024
The vulnerability identified as CVE-2018-4407 represents a critical memory corruption flaw that impacted multiple Apple operating systems including iOS versions prior to 12, macOS Mojave 10.14, tvOS 12, and watchOS 5. This issue stems from inadequate input validation within Apple's kernel components, specifically affecting the network stack and system memory management functions. The flaw manifests as a buffer overflow condition that occurs when processing malformed network packets or system calls, creating opportunities for arbitrary code execution and system compromise. Security researchers initially identified this vulnerability through fuzzing techniques and code analysis of kernel components that handle network communication protocols. The vulnerability operates at the kernel level, making it particularly dangerous as it can be exploited without user interaction and potentially allows attackers to gain root privileges on affected systems. The memory corruption occurs during the processing of network data structures, where insufficient bounds checking permits data to be written beyond allocated memory regions, leading to unpredictable system behavior and potential exploitation.
The technical implementation of this vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios. The flaw demonstrates characteristics consistent with the ATT&CK framework's technique T1068, which involves exploiting legitimate credentials and system access to execute malicious code. Attackers could leverage this vulnerability by crafting specially malformed network packets that, when processed by the affected kernel components, trigger the memory corruption. The exploit chain typically involves sending malicious network traffic to a target device, where the kernel's insufficient validation leads to memory corruption that can be leveraged for privilege escalation. The vulnerability's impact extends beyond simple denial of service as it provides a pathway for complete system compromise, making it particularly concerning for enterprise environments and mobile device management scenarios. The issue affects both wireless and wired network communications, including Wi-Fi, Ethernet, and Bluetooth protocols that rely on the vulnerable kernel components.
The operational impact of CVE-2018-4407 creates significant risks for organizations deploying affected Apple devices in production environments. System administrators face challenges in identifying vulnerable endpoints and implementing timely patches across diverse device fleets. The vulnerability's stealthy nature means that exploitation might not immediately manifest as system crashes or visible errors, allowing attackers to maintain persistent access to compromised systems. Organizations with legacy iOS devices or older macOS systems remain particularly vulnerable, as these platforms may not receive security updates or support. The exploitability of this vulnerability has been demonstrated in various security research publications and real-world attacks targeting enterprise networks and mobile device management systems. Mobile device management solutions must account for this vulnerability when implementing security policies and monitoring for potential exploitation attempts. The timing of the vulnerability's disclosure and patch release created a window of opportunity for threat actors to develop and deploy automated exploitation tools, increasing the overall risk to affected organizations.
Mitigation strategies for CVE-2018-4407 primarily focus on immediate system updates and patch management procedures. Organizations should prioritize updating all affected Apple devices to the latest supported versions, including iOS 12, macOS Mojave 10.14, tvOS 12, and watchOS 5. Network segmentation and monitoring solutions should be implemented to detect anomalous network traffic patterns that might indicate exploitation attempts. Security teams should deploy intrusion detection systems capable of identifying malformed network packets that could trigger the vulnerability. Additional protective measures include implementing network access controls, disabling unnecessary network services, and maintaining comprehensive system monitoring for signs of compromise. The vulnerability's kernel-level nature necessitates careful planning for patch deployment to avoid potential system instability during update processes. Organizations should conduct thorough risk assessments to identify all affected endpoints and prioritize remediation efforts based on system criticality and exposure levels. Regular security audits and vulnerability scanning should be conducted to ensure comprehensive coverage of all Apple device types within the organization's infrastructure. The remediation process must also consider compatibility testing and rollback procedures to maintain business continuity during the patching phase.