CVE-2018-1016 in Windows
Summary
by MITRE
A remote code execution vulnerability exists when the Windows font library improperly handles specially crafted embedded fonts, aka "Microsoft Graphics Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-1010, CVE-2018-1012, CVE-2018-1013, CVE-2018-1015.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 08/15/2024
The vulnerability identified as CVE-2018-1016 represents a critical remote code execution flaw within Microsoft Windows operating systems that stems from improper handling of specially crafted embedded fonts by the Windows font library. This vulnerability specifically affects the graphics rendering component that processes font files, creating a pathway for malicious actors to execute arbitrary code on affected systems. The flaw exists in the Windows font subsystem's ability to parse and render embedded font data, particularly when these fonts contain malformed or maliciously constructed elements that trigger buffer overflows or other memory corruption conditions during processing.
The technical nature of this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which addresses out-of-bounds read vulnerabilities. Attackers can exploit this weakness by delivering maliciously crafted font files through various attack vectors including email attachments, web downloads, or malicious websites. When a user's system processes these compromised fonts, either automatically during system operations or manually through user interaction, the vulnerable font library code executes code from the malicious font data, potentially allowing full system compromise. The vulnerability is particularly dangerous because it can be triggered without user interaction in certain scenarios, making it a significant threat to enterprise environments where automated font processing occurs.
The operational impact of CVE-2018-1016 extends across multiple Windows versions including legacy systems like Windows Server 2008 and Windows Server 2008 R2, as well as modern platforms such as Windows 10 and Windows Server 2016. This broad scope means that organizations running any of these affected systems face substantial risk of exploitation, with potential for lateral movement within networks once initial compromise occurs. The vulnerability maps to ATT&CK technique T1059.007, which covers the use of PowerShell for execution, as attackers often leverage the compromised system to deploy additional payloads or establish persistence. Organizations may experience unauthorized access, data exfiltration, and complete system takeover, with the attack surface expanding through the exploitation of the graphics rendering subsystem that is fundamental to Windows user interface operations.
Mitigation strategies for CVE-2018-1016 should prioritize immediate patch deployment through Microsoft's security updates, which address the font processing logic that allows the buffer overflow conditions to occur. Network segmentation and application whitelisting can provide additional defense-in-depth layers, particularly by restricting access to font processing capabilities in critical environments. Security monitoring should focus on detecting unusual font file processing activities and potential exploitation attempts through the graphics subsystem. Organizations should implement regular vulnerability assessments targeting font handling components and consider disabling automatic font rendering for untrusted content sources. The remediation process must account for the widespread nature of affected systems, requiring comprehensive deployment planning across all supported Windows versions while maintaining operational continuity through careful testing of patches in controlled environments before broader rollout.