CVE-2022-28550
📋 TL;DR
CVE-2022-28550 is a critical buffer overflow vulnerability in jhead image metadata tool that allows attackers to execute arbitrary code or crash the application. It affects users who process untrusted image files with jhead, particularly when handling files containing multiple &i or &o parameters. The vulnerability stems from improper boundary checking when copying strings to a stack buffer.
💻 Affected Systems
- jhead
📦 What is this software?
Jhead by Jhead Project
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment
Likely Case
Application crash (denial of service) or limited code execution in the context of the jhead process
If Mitigated
No impact if patched version is used or if untrusted files are not processed
🎯 Exploit Status
Exploitation requires crafting malicious image files; public proof-of-concept demonstrates the buffer overflow
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.06.1 and later
Vendor Advisory: https://github.com/Matthias-Wandel/jhead/commit/64894dbc7d8e1e232e85f1cab25c64290b2fc167
Restart Required: No
Instructions:
1. Download latest jhead from GitHub 2. Compile and install 3. Replace existing jhead binary
🔧 Temporary Workarounds
Input validation wrapper
linuxCreate wrapper script that validates input files before passing to jhead
#!/bin/bash
# Validate file exists and is regular file
if [ ! -f "$1" ]; then
echo "Invalid file"
exit 1
fi
# Run jhead with limited parameters
jhead "$1"
🧯 If You Can't Patch
- Restrict jhead usage to trusted users only
- Implement strict file upload validation for any web applications using jhead
🔍 How to Verify
Check if Vulnerable:
Check jhead version: jhead -V | grep -i versionCheck Version:
jhead -V 2>&1 | head -1Verify Fix Applied:
Verify version is 3.06.1 or later and test with known vulnerable test files📡 Detection & Monitoring
Log Indicators:
- Multiple jhead crashes with segmentation faults
- Unusual process spawning from jhead
Network Indicators:
- Large image file uploads followed by jhead process crashes
SIEM Query:
process_name:"jhead" AND (event_type:"crash" OR exit_code:139)