Listen to this Post
How the CVE Works
The vulnerability in FPDI (Free PDF Document Importer) arises due to improper handling of specially crafted PDF files. When parsing malicious PDFs, the library fails to enforce memory limits, leading to uncontrolled memory consumption. An attacker can exploit this by submitting a small PDF containing recursive object references or deeply nested structures, forcing the parser into an infinite loop or excessive memory allocation. This results in an Out-of-Memory (OOM) condition, crashing the application and causing a Denial of Service (DoS).
DailyCVE Form
Platform: FPDI
Version: <2.6.4
Vulnerability: Memory Exhaustion
Severity: Critical
Date: Aug 5, 2025
Prediction: Patch expected by Aug 12, 2025
What Undercode Say
Analytics:
$ pdfid malicious.pdf $ memcheck --tool=valgrind fpdi_parser
Exploit:
with open("exploit.pdf", "wb") as f:
f.write(b"%%EOF\n" 1000000)
Protection from this CVE:
- Update to FPDI 2.6.4
- Implement PDF upload size limits
- Use sandboxed environments
Impact:
- Service disruption
- Resource exhaustion
- Persistent DoS attacks
🎯Let’s Practice Exploiting & Learn Patching For Free:
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
