CVE-2025-7271 in CADImage Plugin
Summary
by MITRE • 07/21/2025
IrfanView CADImage Plugin DXF File Parsing Memory Corruption Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of IrfanView CADImage Plugin. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of DXF files. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26193.
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Analysis
by VulDB Data Team • 07/26/2025
The CVE-2025-7271 vulnerability represents a critical memory corruption flaw within the IrfanView CADImage Plugin that specifically targets the parsing of DXF (Drawing Exchange Format) files. This vulnerability exists in the way the plugin processes user-supplied DXF data without adequate input validation mechanisms, creating a dangerous condition where malformed or maliciously crafted DXF files can trigger memory corruption. The vulnerability is particularly concerning because it enables remote code execution when a user visits a malicious webpage or opens a compromised DXF file, making it a significant threat vector for attackers targeting IrfanView users who may encounter such files in email attachments, web downloads, or file sharing environments. The flaw stems from insufficient bounds checking and validation during the parsing process, allowing attackers to manipulate memory structures through carefully crafted input data that exceeds expected buffer sizes or violates expected data formats.
The technical implementation of this vulnerability demonstrates characteristics consistent with CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read errors. When the CADImage plugin processes DXF files, it fails to properly validate the length and structure of various data elements within the file format, particularly in sections that define geometric entities, coordinates, and metadata. This inadequate validation creates opportunities for attackers to craft malicious DXF files that will cause the plugin to write data beyond allocated memory boundaries, potentially overwriting critical program structures or executing arbitrary code. The vulnerability operates at the intersection of memory management and file format parsing, where the plugin's failure to implement proper input sanitization creates a direct path for privilege escalation. The remote code execution capability arises because the plugin runs with the privileges of the user who opens the malicious file, potentially allowing attackers to execute commands with the same permissions as the IrfanView application itself.
From an operational perspective, this vulnerability presents a significant risk to organizations and individual users who rely on IrfanView for image viewing and CAD file processing. The requirement for user interaction makes it less likely to be exploited automatically at scale, but it remains highly dangerous in targeted attacks where attackers can convince victims to open malicious files through social engineering tactics, phishing campaigns, or compromised websites. The vulnerability's impact extends beyond simple code execution to potentially allow full system compromise, especially when combined with other exploitation techniques or when users have elevated privileges. Attackers could leverage this vulnerability to install malware, establish persistent backdoors, or escalate privileges within the compromised system. The ZDI-CAN-26193 reference indicates this vulnerability was recognized and tracked by the Zero Day Initiative, highlighting its significance in the cybersecurity community and the potential for widespread exploitation given IrfanView's popularity in both personal and professional environments.
Mitigation strategies for CVE-2025-7271 should focus on immediate patching of affected IrfanView installations, as the most effective solution requires updating to versions that contain proper input validation and memory management fixes. Organizations should implement strict file validation policies that prevent automatic execution of DXF files from untrusted sources, particularly in email systems and web environments where such files may be encountered. Network-level protections such as web application firewalls and content filtering systems can help block malicious DXF files before they reach end users, while endpoint protection measures should monitor for suspicious file processing activities. Users should be educated about the risks of opening unknown or untrusted files, particularly those with CAD file extensions, and should be encouraged to verify file sources before opening them. Additionally, system administrators should consider implementing sandboxing or virtualization techniques for applications that process CAD files, and should monitor for unusual file processing patterns that might indicate exploitation attempts. The vulnerability highlights the importance of proper input validation and memory safety practices, aligning with ATT&CK technique T1059.007 for command and script interpreter execution, and emphasizes the need for robust software security practices throughout the development lifecycle.