CVE-2016-0046 in Windows
Summary
by MITRE
Windows Reader in Microsoft Windows 8.1, Windows Server 2012 Gold and R2, and Windows 10 allows remote attackers to execute arbitrary code via a crafted Reader file, aka "Microsoft Windows Reader Vulnerability."
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Analysis
by VulDB Data Team • 07/07/2022
The vulnerability identified as CVE-2016-0046 represents a critical remote code execution flaw within Microsoft Windows Reader component that affects multiple operating system versions including Windows 8.1, Windows Server 2012 Gold and R2, and Windows 10. This vulnerability resides in the way Windows Reader processes specially crafted files, creating an opportunity for remote attackers to execute arbitrary code on affected systems without requiring user interaction or authentication. The flaw stems from improper input validation and memory handling within the Reader application's file processing pipeline, making it particularly dangerous as it can be exploited through various attack vectors including email attachments, web downloads, or network shares.
The technical nature of this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions where insufficient memory management leads to memory corruption. Attackers can craft malicious files that trigger buffer overflows when Windows Reader attempts to parse them, potentially allowing remote code execution with the privileges of the targeted user. The vulnerability operates at the application layer and leverages the inherent trust users place in document processing applications, making exploitation relatively straightforward. The flaw specifically affects the Adobe Acrobat Reader component within Windows, where improper handling of structured data during file parsing creates opportunities for attackers to inject malicious code into the execution flow.
From an operational impact perspective, this vulnerability presents significant risk to enterprise environments where Windows Reader is commonly used for document processing. The remote code execution capability means that attackers can potentially gain full system control without user intervention, leading to data breaches, system compromise, and lateral movement within networks. Organizations running affected versions of Windows are particularly vulnerable as the flaw exists in the core operating system components that are widely deployed across corporate environments. The attack surface is broad since Windows Reader is frequently used for processing various document types including pdf files, making it a prime target for cybercriminals seeking persistent access to networked systems.
Security professionals should implement immediate mitigations including applying Microsoft security patches as soon as they become available, disabling unnecessary Reader functionality, and implementing network-based controls to restrict access to potentially malicious files. The vulnerability demonstrates the importance of keeping all system components updated and highlights the risks associated with legacy software integration within modern enterprise environments. Organizations should also consider implementing application whitelisting policies and monitoring for suspicious file processing activities that might indicate exploitation attempts. This vulnerability serves as a reminder of the critical importance of defending against attack vectors that leverage trusted application components and underscores the need for comprehensive vulnerability management programs that address both known and emerging threats in the cybersecurity landscape.