CVE-2017-2443 in macOS
Summary
by MITRE
An issue was discovered in certain Apple products. macOS before 10.12.4 is affected. The issue involves the "Intel Graphics Driver" 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 • 10/29/2024
The vulnerability identified as CVE-2017-2443 represents a critical security flaw within Apple's macOS operating system affecting versions prior to 10.12.4. This issue specifically targets the Intel Graphics Driver component, which serves as a fundamental interface between the operating system and graphics hardware. The vulnerability stems from improper memory management within the graphics driver implementation, creating a potential pathway for malicious actors to exploit system resources and execute unauthorized code with elevated privileges. Security researchers have classified this as a memory corruption vulnerability that could be leveraged to gain unauthorized access to system resources or disrupt normal system operations through denial of service attacks.
The technical nature of this vulnerability lies in how the Intel Graphics Driver handles memory allocation and deallocation processes when processing graphics-related commands from applications. Attackers can craft specially designed applications that trigger memory corruption within the graphics driver's memory space, potentially allowing them to execute arbitrary code with kernel-level privileges. This type of vulnerability falls under the CWE-125 weakness category, which describes "Out-of-bounds Read" conditions where programs access memory locations outside their intended boundaries. The flaw enables attackers to manipulate memory structures in ways that bypass normal privilege separation mechanisms, effectively elevating their execution context from user-level to kernel-level access. According to ATT&CK framework, this vulnerability maps to T1055.011 - "Process Injection: Dynamic-link Library Injection" and T1068 - "Exploitation for Privilege Escalation" techniques.
The operational impact of CVE-2017-2443 extends beyond simple code execution capabilities as it fundamentally undermines the security model of macOS systems. When exploited, this vulnerability allows attackers to bypass the system's memory protection mechanisms and execute malicious code with the highest system privileges, potentially enabling full system compromise. Organizations running affected macOS versions face significant risk of data breaches, system corruption, and unauthorized access to sensitive information. The vulnerability is particularly concerning because it affects the graphics driver component, which is actively used by most applications for rendering graphics, making exploitation relatively straightforward through seemingly legitimate applications. This vulnerability also impacts the system's integrity by allowing attackers to manipulate memory structures that govern critical system operations.
Mitigation strategies for CVE-2017-2443 primarily focus on immediate system updates and operational security measures. The most effective solution involves upgrading to macOS 10.12.4 or later versions where Apple has implemented proper memory management fixes within the Intel Graphics Driver component. System administrators should prioritize patch deployment across all affected devices and monitor for any signs of exploitation attempts. Additional protective measures include implementing application whitelisting policies to restrict execution of untrusted applications, enabling system integrity protection features, and conducting regular security audits of graphics-related processes. Network monitoring should focus on identifying suspicious memory access patterns and unusual graphics processing activities that might indicate exploitation attempts. Organizations should also consider implementing endpoint detection and response solutions that can identify anomalous behavior patterns consistent with memory corruption exploits. The vulnerability highlights the importance of maintaining current system patches and demonstrates how graphics drivers can serve as attack vectors for privilege escalation attacks.