CVE-2004-0575 in Windows
Summary
by MITRE
Integer overflow in DUNZIP32.DLL for Microsoft Windows XP, Windows XP 64-bit Edition, Windows Server 2003, and Windows Server 2003 64-bit Edition allows remote attackers to execute arbitrary code via compressed (zipped) folders that involve an "unchecked buffer" and improper length validation.
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Analysis
by VulDB Data Team • 07/12/2025
The vulnerability identified as CVE-2004-0575 represents a critical integer overflow flaw within DUNZIP32.DLL, a component of Microsoft Windows operating systems including Windows XP and Windows Server 2003 across both 32-bit and 64-bit architectures. This vulnerability stems from inadequate input validation mechanisms within the decompression functionality, specifically when processing compressed archive files. The flaw manifests when the system attempts to decompress zip folders containing malformed data structures that trigger buffer overflow conditions. The integer overflow occurs during the calculation of buffer sizes needed for decompressed data, where maliciously crafted archive files can manipulate these calculations to create oversized buffer allocations that exceed available memory boundaries.
The technical exploitation of this vulnerability leverages the unchecked buffer conditions inherent in the DUNZIP32.DLL implementation, where the system fails to properly validate the length parameters of compressed data structures before allocating memory buffers. This weakness directly maps to CWE-190, which categorizes integer overflow vulnerabilities, and specifically aligns with the broader category of buffer overflow conditions that can lead to arbitrary code execution. Attackers can construct specially crafted zip files that, when processed by the vulnerable system, cause the decompression routine to allocate insufficient memory while simultaneously attempting to write data beyond the allocated buffer boundaries. The improper length validation allows attackers to manipulate the integer arithmetic in such a way that the resulting buffer allocation becomes negative or excessively large, creating memory corruption conditions that can be exploited to inject and execute malicious code with the privileges of the decompressing process.
The operational impact of this vulnerability extends beyond simple code execution, as it can be leveraged to achieve complete system compromise when attackers can influence the decompression process through various attack vectors including email attachments, web downloads, or network file transfers. The vulnerability is particularly dangerous because it operates at the system level within the core decompression libraries, meaning that exploitation can occur without requiring user interaction beyond the simple act of opening a malicious archive file. According to ATT&CK framework categorization, this vulnerability maps to T1059.007 for execution through decompression tools and T1203 for exploitation of software vulnerabilities. The attack surface is broad since any application or service that relies on DUNZIP32.DLL for decompression operations can be targeted, including web browsers, email clients, and file sharing applications that automatically decompress downloaded content.
Mitigation strategies for CVE-2004-0575 should focus on immediate patch deployment through Microsoft security updates, which address the integer overflow conditions in DUNZIP32.DLL by implementing proper input validation and boundary checking mechanisms. Organizations should also implement network segmentation and content filtering measures to prevent unauthorized access to potentially malicious compressed files, particularly in environments where automatic decompression occurs. The implementation of application whitelisting policies can further reduce risk by restricting execution of untrusted decompression tools, while regular system monitoring should be employed to detect anomalous decompression activities that may indicate exploitation attempts. Additionally, security awareness training for end users regarding the dangers of opening suspicious compressed files can provide an additional layer of defense against social engineering attacks that leverage this vulnerability. The vulnerability highlights the importance of robust input validation and memory management practices in system libraries, particularly those handling user-supplied data in security-critical components.