CVE-2016-7612 in watchOS
Summary
by MITRE
An issue was discovered in certain Apple products. iOS before 10.2 is affected. macOS before 10.12.2 is affected. watchOS before 3.1.3 is affected. The issue involves the "Kernel" component. It allows attackers to execute arbitrary code in a privileged context or cause a denial of service (memory corruption) via a crafted app.
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Analysis
by VulDB Data Team • 09/21/2024
The vulnerability identified as CVE-2016-7612 represents a critical kernel-level flaw affecting multiple Apple operating systems including iOS versions prior to 10.2, macOS versions prior to 10.12.2, and watchOS versions prior to 3.1.3. This vulnerability resides within the kernel component of Apple's operating systems, which serves as the core foundation responsible for system-level operations and resource management. The kernel operates with the highest privilege level and manages critical system functions including memory allocation, process scheduling, and hardware interactions. When compromised, kernel vulnerabilities provide attackers with unprecedented access to system resources and capabilities that are normally restricted to authorized system processes.
The technical nature of this vulnerability stems from memory corruption issues that occur when processing specially crafted applications. Attackers can exploit this flaw by developing malicious applications that trigger specific memory handling errors within the kernel. These memory corruption vulnerabilities typically arise from insufficient input validation, buffer overflows, or improper memory management practices within kernel code. The flaw allows attackers to execute arbitrary code with kernel privileges, effectively bypassing standard security mechanisms and gaining complete control over the affected system. This privilege escalation capability transforms a regular application into a system-level threat capable of performing actions such as modifying system files, accessing protected data, or installing persistent backdoors.
The operational impact of CVE-2016-7612 extends beyond simple privilege escalation, as it can also facilitate denial of service conditions that may render affected devices unusable. When exploited, this vulnerability can cause system crashes, memory corruption, or complete system instability that requires manual intervention for recovery. The implications are particularly severe for mobile devices and embedded systems where users may not have immediate access to recovery mechanisms or technical support. The vulnerability affects a broad range of Apple products including iPhones, iPads, Mac computers, and Apple Watch devices, making it a widespread concern across the Apple ecosystem. This type of vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write conditions, both of which are common manifestations of kernel memory corruption flaws.
The exploitation of this vulnerability follows patterns consistent with the attack technique framework where attackers leverage kernel-level privileges to establish persistent access to target systems. This aligns with ATT&CK technique T1059, which covers command and scripting interpreter, and T1068, which addresses exploit for privilege escalation. The attack surface is particularly concerning because it requires no special user interaction beyond installing a malicious application, making it susceptible to various attack vectors including social engineering, compromised app stores, or drive-by downloads. Organizations and individuals must understand that this vulnerability represents a fundamental weakness in the security architecture of affected systems, potentially allowing adversaries to establish long-term presence on devices without detection.
Mitigation strategies for CVE-2016-7612 primarily involve immediate system updates to the patched versions of affected operating systems. Apple released security updates that addressed the kernel memory corruption issues through comprehensive patches that corrected the underlying memory handling flaws. Users should implement a layered defense approach that includes regular security updates, application whitelisting where possible, and monitoring for suspicious system behavior. System administrators should prioritize patch deployment across all affected devices and implement network monitoring to detect potential exploitation attempts. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and highlights the risks associated with running outdated operating system versions. Organizations should also consider implementing additional security controls such as mobile device management solutions that can enforce security policies and automatically deploy security updates to prevent exploitation of known vulnerabilities.