CVE-2004-1271 in DXF File Format Viewer
Summary
by MITRE
Buffer overflow in the dxfin function in d.c for dxfscope 0.2 allows remote attackers to execute arbitrary code via a crafted DXF file.
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Analysis
by VulDB Data Team • 07/21/2017
The vulnerability identified as CVE-2004-1271 represents a critical buffer overflow flaw within the dxfin function of d.c component in dxfscope version 0.2. This software library serves as a utility for processing drawing exchange format files, commonly used in computer-aided design applications. The buffer overflow occurs when the dxfin function processes malformed DXF input files, specifically when handling certain data structures that exceed allocated memory boundaries. This flaw falls under the CWE-121 category of stack-based buffer overflow, where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The vulnerability is particularly dangerous because it can be triggered through remote exploitation via crafted DXF files, making it a significant threat to systems that process untrusted drawing files. The affected dxfscope 0.2 software operates by parsing DXF format files, which contain geometric data and drawing instructions used by CAD applications. When the dxfin function encounters malformed data structures within these files, it fails to properly validate input lengths before copying data into fixed-size buffers, creating opportunities for memory corruption.
The operational impact of this vulnerability extends beyond simple code execution, as it enables attackers to gain complete control over affected systems. The buffer overflow allows remote adversaries to inject malicious code into the target process memory space, potentially leading to privilege escalation or full system compromise. This vulnerability is particularly concerning in environments where CAD software processes files from untrusted sources, such as web-based design platforms or collaborative design systems. The attack vector involves sending a specially crafted DXF file that, when opened by dxfscope 0.2, triggers the buffer overflow condition. This enables attackers to overwrite return addresses, function pointers, or other critical memory locations, effectively allowing arbitrary code execution. The vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation can lead to command execution within the context of the affected application. Systems running dxfscope 0.2 that process untrusted DXF files are at high risk, especially in enterprise environments where CAD data flows through multiple systems and applications. The vulnerability can be exploited across different operating systems where the affected software is installed, making it a widespread threat.
Mitigation strategies for CVE-2004-1271 should focus on both immediate patching and operational security measures. The primary solution involves upgrading to a patched version of dxfscope or removing the vulnerable software from production environments. Organizations should implement strict input validation policies for all DXF files, particularly those received from external sources or untrusted parties. Network segmentation and access controls can limit the potential impact of exploitation by restricting access to systems that process DXF files. Security monitoring should include detection of suspicious file processing activities, particularly when dealing with CAD-related software. Implementing application whitelisting can prevent execution of vulnerable versions of dxfscope, while regular security assessments should verify that no legacy systems are running unpatched software. The vulnerability also highlights the importance of secure coding practices, particularly around buffer management and input validation. Organizations should consider implementing sandboxing techniques for processing untrusted drawing files, isolating the vulnerable software from critical system resources. Additionally, regular security updates and vulnerability assessments should be conducted to identify similar buffer overflow issues in other legacy software components. The remediation process must also include comprehensive testing of patched versions to ensure that security fixes do not introduce regressions in functionality. Proper logging and incident response procedures should be established to detect and respond to potential exploitation attempts targeting this vulnerability.