CVE-2003-0112 in Windows
Summary
by MITRE
Buffer overflow in Windows Kernel allows local users to gain privileges by causing certain error messages to be passed to a debugger.
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Analysis
by VulDB Data Team • 08/25/2025
The vulnerability identified as CVE-2003-0112 represents a critical buffer overflow flaw within the Windows kernel that enables local attackers to escalate their privileges through improper handling of error messages. This vulnerability resides in the kernel-level components of Microsoft Windows operating systems, specifically affecting the manner in which certain error conditions are processed and transmitted to debugging mechanisms. The flaw occurs when the kernel attempts to format and display error messages that exceed predetermined buffer boundaries, creating an exploitable condition that can be leveraged by malicious users with local system access.
The technical implementation of this vulnerability stems from inadequate input validation and buffer management within kernel space error handling routines. When specific error conditions occur during system operations, the kernel constructs error messages that are subsequently passed to debugging interfaces. The buffer overflow manifests when the constructed error message exceeds the allocated memory space, causing adjacent memory locations to be overwritten. This memory corruption can be strategically manipulated to overwrite critical kernel data structures or execution pointers, potentially allowing an attacker to redirect program execution flow. The vulnerability specifically relates to CWE-121, which addresses stack-based buffer overflow conditions, and CWE-122, which covers heap-based buffer overflow scenarios, making it a significant concern for system stability and security.
The operational impact of CVE-2003-0112 extends beyond simple privilege escalation to potentially enable full system compromise when combined with other exploitation techniques. Local users who can execute code on the target system can leverage this vulnerability to elevate their privileges from standard user level to kernel-level access, effectively granting them complete control over the affected Windows system. This privilege escalation capability aligns with ATT&CK technique T1068, which covers 'Local Privilege Escalation' through kernel exploits, and T1059, which addresses 'Command and Scripting Interpreter' by enabling attackers to execute malicious code with elevated privileges. The vulnerability's exploitation requires local system access, making it particularly dangerous in environments where users might have legitimate access to systems but could potentially be compromised or malicious.
Mitigation strategies for this vulnerability must address both immediate patching requirements and long-term security hardening measures. Microsoft released security updates that corrected the buffer overflow conditions in affected Windows kernel components, requiring system administrators to apply these patches promptly to prevent exploitation. Additionally, implementing kernel address space layout randomization KASLR and data execution prevention DEP can significantly reduce exploit reliability even if patches are not immediately applied. System administrators should also consider implementing least privilege principles and monitoring for unusual debugging activity that might indicate exploitation attempts. The vulnerability demonstrates the critical importance of kernel-level security and proper input validation in preventing local privilege escalation attacks that can compromise entire operating system functionalities. Organizations must maintain comprehensive patch management processes and conduct regular security assessments to identify and remediate similar vulnerabilities in their Windows environments.