CVE-2025-24993 in Windows
Summary
by MITRE • 03/11/2025
Heap-based buffer overflow in Windows NTFS allows an unauthorized attacker to execute code locally.
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Analysis
by VulDB Data Team • 10/22/2025
The vulnerability identified as CVE-2025-24993 represents a critical heap-based buffer overflow within the Windows NTFS file system implementation that poses significant security risks to affected systems. This flaw exists in the way the operating system handles certain file operations within the NTFS file system, specifically when processing malformed or specially crafted file structures that trigger memory corruption during file access or manipulation. The vulnerability is particularly concerning because it allows for local code execution, meaning an attacker must already have some level of access to the system but does not require elevated privileges to exploit the flaw. The buffer overflow occurs in the heap memory management portion of the NTFS driver, where insufficient bounds checking permits data to be written beyond allocated memory boundaries, potentially corrupting adjacent memory regions and enabling arbitrary code execution.
The technical nature of this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent heap memory. This particular implementation flaw demonstrates how file system drivers can become attack vectors when proper input validation is absent during file processing operations. The NTFS file system's handling of specific file attributes or metadata structures creates conditions where attacker-controlled data can cause memory corruption that the operating system cannot properly handle, leading to potential privilege escalation or system compromise. The vulnerability's exploitation requires careful crafting of file structures that trigger the specific memory corruption pattern within the NTFS driver's heap management routines, making it a sophisticated target for attackers who understand the underlying file system architecture.
From an operational impact perspective, this vulnerability creates substantial risk for Windows systems that utilize NTFS file systems, particularly those running on desktop or server environments where file system operations are frequent and varied. The local code execution capability means that an attacker with minimal access to the system could potentially escalate privileges or gain unauthorized access to sensitive data and system resources. The vulnerability affects multiple Windows versions and could be exploited through various file system operations including file creation, modification, or even simple file access operations that trigger the affected NTFS driver components. Security teams must consider this vulnerability as a potential entry point for more extensive attacks, especially in environments where file sharing or network access might provide attackers with opportunities to place malicious files on affected systems. The nature of the flaw suggests that it could be triggered through various means including network file shares, removable media, or local file operations that the system performs automatically.
Mitigation strategies for CVE-2025-24993 should include immediate deployment of Microsoft security patches as they become available, which will address the underlying heap overflow conditions in the NTFS driver implementation. Organizations should also implement additional protective measures such as restricting file system access permissions, monitoring for unusual file system operations, and employing application whitelisting to prevent execution of potentially malicious code. The vulnerability's classification under ATT&CK technique T1059.007 for Windows Command Shell indicates that attackers may attempt to leverage this vulnerability to establish persistent access through command execution capabilities. Network segmentation and monitoring solutions should be enhanced to detect unusual file system activity patterns that might indicate exploitation attempts. Regular system auditing and vulnerability scanning should be conducted to identify systems that may be running outdated versions of Windows where this vulnerability remains unpatched, particularly in enterprise environments where multiple operating system versions may coexist. The remediation process should include comprehensive testing of patches in controlled environments before widespread deployment to ensure compatibility with existing applications and system configurations.