CVE-2014-8820 in Mac OS X
Summary
by MITRE
The Intel Graphics Driver in Apple OS X before 10.10.2 allows local users to gain privileges via unspecified vectors, a different vulnerability than CVE-2014-8819 and CVE-2014-8821.
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Analysis
by VulDB Data Team • 12/15/2024
The vulnerability identified as CVE-2014-8820 represents a critical privilege escalation flaw within the Intel Graphics Driver component of Apple's macOS operating system. This issue affects versions prior to 10.10.2 and demonstrates the inherent risks associated with graphics driver implementations in modern operating systems where kernel-level components interact with hardware peripherals. The vulnerability falls under the broader category of kernel exploits that can be leveraged by local attackers to elevate their privileges from standard user level to administrative access, fundamentally compromising system security boundaries.
The technical nature of this vulnerability stems from unspecified vectors within the Intel Graphics Driver implementation that create opportunities for privilege escalation. While the specific technical details remain undisclosed, such flaws typically involve improper input validation, memory corruption issues, or inadequate access controls within the graphics driver's kernel extension. These types of vulnerabilities often manifest as buffer overflows, use-after-free conditions, or improper privilege checks that allow malicious code to manipulate kernel memory or execute arbitrary code with elevated privileges. The fact that this vulnerability is distinct from CVE-2014-8819 and CVE-2014-8821 indicates it represents a separate attack surface within the same driver component, highlighting the complexity and interconnectedness of graphics driver security.
The operational impact of CVE-2014-8820 is significant as local users who can execute code on a vulnerable system can potentially gain root access to the entire operating system. This privilege escalation capability enables attackers to bypass standard security controls, install persistent backdoors, modify system files, and access sensitive data without detection. The attack vector requires local system access, making it particularly concerning for environments where user accounts may be compromised through social engineering or other means. Once escalated to root privileges, attackers can manipulate system configurations, disable security features, and establish persistent access that can survive system reboots, fundamentally undermining the security model of the operating system.
Mitigation strategies for this vulnerability primarily involve upgrading to Apple macOS 10.10.2 or later versions where the issue has been resolved through driver updates and security patches. System administrators should implement comprehensive patch management policies to ensure all affected systems receive timely updates. Additional protective measures include enabling System Integrity Protection where available, monitoring for unusual privilege escalation activities, and implementing least privilege principles to minimize potential damage from compromised accounts. From a cybersecurity perspective, this vulnerability aligns with ATT&CK techniques related to privilege escalation and kernel exploitation, specifically mapping to tactics such as privilege escalation through kernel exploits and maintaining access through persistence mechanisms. The vulnerability also corresponds to CWE categories related to improper privilege management and kernel-level memory corruption issues, emphasizing the need for robust driver security testing and code review processes to prevent similar issues in future implementations.
This vulnerability serves as a reminder of the critical importance of graphics driver security in operating system ecosystems, where hardware abstraction layers can create complex attack surfaces that require continuous security assessment and monitoring. The interconnected nature of modern operating systems means that vulnerabilities in seemingly isolated components like graphics drivers can have cascading effects on overall system security, necessitating comprehensive security approaches that address both user-space and kernel-level components.