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How CVE-2025-7234 Works
The vulnerability exists in the CADImage plugin of IrfanView when processing Computer Graphics Metafile (CGM) files. During parsing, the plugin fails to properly validate the size of data chunks before writing them to fixed-size buffers. This allows an attacker to craft a malicious CGM file with specially crafted header values that trigger an out-of-bounds write operation. By carefully controlling the overwritten memory regions, an attacker can corrupt function pointers or exception handlers, ultimately gaining control of the instruction pointer. When successfully exploited, this leads to arbitrary code execution within the context of the IrfanView process.
DailyCVE Form
Platform: IrfanView CADImage Plugin
Version: 4.60
Vulnerability: Out-of-Bounds Write
Severity: Critical
Date: 07/21/2025
Prediction: Patch by 08/15/2025
What Undercode Say
binwalk -E malicious.cgm xxd -g 1 malicious.cgm | head -n 20 gdb -ex r --args irfanview.exe malicious.cgm !exploitable -v
How Exploit
1. Craft CGM with oversized segment
2. Set malicious jump address
3. Trigger buffer overflow
4. Gain EIP control
5. Execute shellcode
Protection from this CVE
1. Update plugin
2. Disable CGM support
3. Use file restriction policies
Impact
1. Full system compromise
2. Malware deployment
3. Data exfiltration
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
