CVE-2007-3668 in Nmsdvdx Dvd Burning Sdk
Summary
by MITRE
Multiple unspecified vulnerabilities in NMSDVDXU.DLL in NuMedia NMSDVDX allow remote attackers to cause a denial of service via "improperly initialized" (1) LoadSegmentWord, (2) PartitionType, (3) SectorCount, and (4) BootFilePath variables.
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Analysis
by VulDB Data Team • 10/26/2017
The vulnerability identified as CVE-2007-3668 resides within the NMSDVDXU.DLL component of NuMedia's NMSDVDX software, representing a critical security flaw that enables remote attackers to execute denial of service attacks. This issue stems from improper initialization of several critical variables including LoadSegmentWord, PartitionType, SectorCount, and BootFilePath within the DLL library. The vulnerability operates at the kernel level of the operating system, specifically targeting the disk drive and boot process management functions that are fundamental to system operation. The improper initialization of these variables creates exploitable conditions where malicious actors can manipulate the software's behavior to cause system instability and complete system shutdown. The affected system components are particularly vulnerable because they handle low-level disk operations and boot file management processes that are essential for proper system functionality.
The technical exploitation of this vulnerability involves crafting malicious input data that triggers the improper initialization of the specified variables within the NMSDVDXU.DLL library. When these variables fail to initialize correctly, they create undefined behavior within the disk drive management functions that can lead to system crashes or complete system hangs. The LoadSegmentWord variable controls memory segment loading operations, PartitionType manages disk partition identification, SectorCount handles sector counting for disk operations, and BootFilePath manages the path to boot files. These variables when improperly initialized can cause cascading failures throughout the disk management subsystem. The vulnerability represents a classic case of uninitialized variable exploitation where the lack of proper initialization creates conditions for memory corruption and system instability. This type of vulnerability falls under CWE-457: Use of Uninitialized Variable, which is classified as a medium severity issue in the CWE taxonomy but can be exploited for significant operational impact.
The operational impact of this vulnerability extends beyond simple denial of service to potentially compromise entire system availability and integrity. When exploited, the vulnerability can cause systems to crash repeatedly, making them unusable for legitimate users and creating significant business disruption. The affected system components are particularly sensitive because they operate at the lowest levels of the operating system, where failures can cascade into complete system failures. Attackers can leverage this vulnerability to create persistent denial of service conditions that may require system reboot or manual intervention to resolve. The vulnerability affects systems that utilize NuMedia's NMSDVDX software for disk drive management and boot file operations, potentially impacting enterprise environments where such software is deployed for system administration tasks. The vulnerability's remote exploitation capability means that attackers do not require physical access to the target system, making it particularly dangerous in networked environments.
Mitigation strategies for this vulnerability require immediate patching of the affected NMSDVDXU.DLL component through official vendor updates. System administrators should implement network segmentation to limit exposure of affected systems to untrusted networks and disable unnecessary disk drive management functions when possible. The vulnerability can be addressed through proper input validation and initialization procedures that ensure all variables are properly initialized before use. Security monitoring should be enhanced to detect unusual disk drive activity patterns that may indicate exploitation attempts. Organizations should also implement regular vulnerability assessments to identify similar uninitialized variable issues in other software components. The remediation process involves updating to patched versions of NuMedia NMSDVDX software and ensuring that all system components properly initialize variables before execution. Additionally, system hardening measures should be implemented to reduce the attack surface and prevent exploitation of similar vulnerabilities. This includes implementing proper access controls, disabling unnecessary services, and maintaining current security patches for all system components. The vulnerability demonstrates the importance of proper software development practices and the critical need for comprehensive testing of variable initialization procedures in system-level software components.