CVE-2018-1015 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-2018-1016.
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Analysis
by VulDB Data Team • 08/15/2024
The vulnerability identified as CVE-2018-1015 represents a critical remote code execution flaw within Microsoft Windows operating systems, specifically within the graphics rendering subsystem. This vulnerability stems from improper handling of specially crafted embedded fonts by the Windows font library, creating a pathway for attackers to execute arbitrary code on affected systems. The flaw affects a broad range of Microsoft Windows versions including legacy systems like Windows 7, Windows Server 2008, and Windows Server 2008 R2, as well as newer releases such as Windows 10 and Windows Server 2016, making it particularly concerning for enterprise environments with diverse operating system deployments.
The technical root cause of this vulnerability lies in the Windows font library's insufficient validation mechanisms when processing embedded font data. When a specially crafted font file is loaded, the library fails to properly sanitize input parameters, leading to memory corruption that can be exploited by malicious actors. This type of vulnerability falls under the Common Weakness Enumeration category CWE-121, which describes heap-based buffer overflow conditions, and more specifically aligns with CWE-125, indicating out-of-bounds read vulnerabilities. The flaw operates at the kernel level within the graphics subsystem, making it particularly dangerous as it can be triggered through various attack vectors including email attachments, web downloads, or malicious websites that serve compromised font files.
The operational impact of CVE-2018-1015 extends beyond simple remote code execution, as it can enable full system compromise and persistence within affected environments. Attackers leveraging this vulnerability can potentially gain unauthorized access to systems, escalate privileges, and establish backdoors for continued access. According to the MITRE ATT&CK framework, this vulnerability maps to technique T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation. The vulnerability's broad scope across multiple Windows versions means that organizations with mixed operating system environments face significant exposure risks, particularly in environments where legacy systems remain operational. The vulnerability can be exploited through various attack surfaces including email clients, web browsers, and document viewers that utilize Windows font rendering capabilities.
Mitigation strategies for CVE-2018-1015 should prioritize immediate patch deployment through Microsoft's regular security updates, as the vendor has released comprehensive fixes for all affected Windows versions. Organizations should implement network segmentation to limit exposure of critical systems and deploy application whitelisting solutions to prevent execution of untrusted font files. Additionally, security teams should monitor for suspicious network traffic patterns and implement endpoint detection and response solutions that can identify exploitation attempts. System administrators should consider disabling unnecessary font rendering capabilities in web browsers and email clients where possible, and maintain comprehensive backup and recovery procedures to ensure rapid restoration of compromised systems. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and implementing defense-in-depth strategies to protect against sophisticated exploitation techniques targeting core operating system components.