CVE-2024-21372 in Windows
Summary
by MITRE • 02/13/2024
Windows OLE Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 07/03/2026
This vulnerability represents a critical remote code execution flaw in Microsoft Windows operating systems that leverages the Object Linking and Embedding (OLE) technology to execute malicious code remotely without user interaction. The vulnerability stems from improper handling of OLE objects when processing specially crafted files or web content, allowing attackers to exploit this weakness through various attack vectors including email attachments, malicious websites, or network shares. The technical implementation involves the failure to properly validate and sanitize OLE object data structures during parsing operations, creating opportunities for attackers to inject and execute arbitrary code within the context of the target system.
The core technical flaw resides in how Windows processes OLE compound document format files and objects embedded within them, particularly when these objects contain malformed or malicious data sequences. This vulnerability is categorized under CWE-129 as an Improper Validation of Array Index, which occurs when the system fails to properly validate array indices used to access OLE object properties or method calls. The flaw exists in multiple Windows components including the Windows OLE Automation subsystem and related file processing libraries that handle compound document formats. Attackers can leverage this vulnerability through techniques such as buffer overflows, memory corruption, or heap-based exploitation methods that manipulate the OLE object parsing routines.
The operational impact of this vulnerability is severe and far-reaching across enterprise environments, as it enables attackers to achieve complete system compromise without requiring user interaction or elevated privileges. Once exploited, the vulnerability allows remote attackers to execute code with the privileges of the current user account, potentially leading to full system takeover and lateral movement within networks. The attack surface is extensive since OLE objects are commonly found in various file formats including office documents, pdf files, and web content, making this vulnerability particularly dangerous for organizations. According to ATT&CK framework, this vulnerability maps to T1203 - Exploitation for Client Execution and T1068 - Exploitation for Privilege Escalation, demonstrating how attackers can leverage it for both initial compromise and privilege escalation.
Organizations can mitigate this vulnerability through multiple defensive measures including immediate application of Microsoft security patches, implementation of network segmentation to limit attack surface, and deployment of endpoint protection solutions with behavioral monitoring capabilities. The recommended mitigation strategy involves maintaining current Windows updates, implementing strict file validation policies, and configuring application whitelisting to restrict execution of untrusted OLE objects. Security teams should also implement network-based intrusion detection systems to monitor for exploitation attempts and establish incident response procedures specifically addressing remote code execution vulnerabilities. Additional controls include disabling unnecessary OLE functionality in browsers, implementing email filtering solutions that scan for malicious OLE content, and conducting regular vulnerability assessments to identify potential exposure points within the enterprise environment.