CVE-2021-21821CWE-121

A stack-based buffer overflow vulnerability exists in the PDF process_fontname functionality of Accusoft ImageGear 19.9

Critical · published July 8, 2021

CVSS v3.0
9.8
EPSS
2%
Percentile
80.2
In the wild
Unconfirmed
What it is

🔥 A stack-based buffer overflow in Accusoft ImageGear can turn any crafted PDF file into a remote code execution nightmare! Think of it like a delivery truck stuffed with oversized packages that can't possibly fit in the loading dock. When the truck backs in, it gets jammed, causing all sorts of chaos instead of smoothly unloading the goods! An attacker could exploit this by sending a specially crafted PDF, leading to total code execution on the vulnerable system. This means they could take control, steal data, or disrupt critical services — absolutely devastating!

Put simply

Think of it like a delivery truck stuffed with oversized packages that can't possibly fit in the loading dock. When the truck backs in, it gets jammed, causing all sorts of chaos instead of smoothly unloading the goods! This vulnerability allows an attacker to trigger a stack-based buffer overflow in the PDF process_fontname functionality, enabling malicious code execution through a malformed PDF file.

What to do

An attacker could exploit this by sending a specially crafted PDF, leading to total code execution on the vulnerable system. This means they could take control, steal data, or disrupt critical services — absolutely devastating! To protect against this, update Accusoft ImageGear to the latest version immediately. Review your processing pipeline for untrusted PDF files and implement strict validation and sanitization of incoming files. You've got this! Stay vigilant, patch up, and keep those systems safe! 🛡️

The record
Technical detail
CVSS v3.0
9.8 · CRITICAL
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01963 · 80.2th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2021-07-08T10:57Z
EPSS history
Timeline
  • 08 JUL 10:57Z
    A stack-based buffer overflow vulnerability exists in the PDF process_fontname functionality of Accusoft ImageGear 19.9
    cvelistv5