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How the CVE Works
The vulnerability (CVE-2025-7239) in IrfanView’s CADImage Plugin stems from improper memory handling when parsing DWG files. Attackers craft malicious DWG files containing specially designed data that triggers memory corruption due to insufficient input validation. When a victim opens the malicious file, the plugin fails to properly validate the file structure, leading to a heap-based buffer overflow. This allows arbitrary code execution within the context of the application, enabling full system compromise if exploited successfully. The flaw is reachable via user interaction (opening a malicious file or visiting a malicious webpage).
DailyCVE Form
Platform: IrfanView CADImage Plugin
Version: <= 4.60
Vulnerability: Memory Corruption (RCE)
Severity: Critical
Date: 07/25/2025
Prediction: Patch expected by 08/15/2025
What Undercode Say
Analytics:
strings malicious.dwg | grep "ACAD" gdb -ex 'run' -ex 'bt' --args irfanview.exe malicious.dwg python3 exploit_dwg.py --target-version 4.60
How Exploit
- Craft malicious DWG file with oversized entity data.
- Trigger heap overflow via malformed object headers.
- Overwrite function pointers for EIP control.
Protection from this CVE
- Disable CADImage Plugin if unused.
- Apply vendor patch upon release.
- Restrict DWG file execution via Group Policy.
Impact:
- Remote Code Execution (RCE)
- Full system compromise
- Low attack complexity (user-dependent)
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
