CVE-2019-5084
📋 TL;DR
A heap out-of-bounds write vulnerability in LEADTOOLS 20's TIF parsing functionality allows attackers to execute arbitrary code by crafting a malicious TIF image. This affects any application using the vulnerable LEADTOOLS library to process TIF files. The vulnerability could lead to complete system compromise if exploited successfully.
💻 Affected Systems
- LEADTOOLS
📦 What is this software?
Leadtools by Leadtools
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, or ransomware deployment.
Likely Case
Application crash (denial of service) or limited code execution within the application context.
If Mitigated
Application crash with no code execution if memory protections (ASLR, DEP) are effective.
🎯 Exploit Status
Exploitation requires crafting a malicious TIF file and getting the victim to open it. Public proof-of-concept exists from Talos Intelligence.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: LEADTOOLS 20.5 or later
Vendor Advisory: https://www.leadtools.com/support/kb/articles/security-advisory-cve-2019-5084
Restart Required: Yes
Instructions:
1. Download and install LEADTOOLS version 20.5 or later from the vendor website. 2. Replace the vulnerable library files in your applications. 3. Restart any applications using LEADTOOLS. 4. Recompile applications if using the SDK.
🔧 Temporary Workarounds
Disable TIF file processing
allConfigure applications to reject or not process TIF files using LEADTOOLS.
Application-specific configuration - no universal command
Implement file type validation
allAdd server-side validation to reject suspicious TIF files before processing.
Implement file signature validation in application code
🧯 If You Can't Patch
- Isolate systems using LEADTOOLS from untrusted networks
- Implement application whitelisting to prevent execution of malicious code
🔍 How to Verify
Check if Vulnerable:
Check LEADTOOLS version - if version 20 and build number before the fix (typically before 20.5), it's vulnerable.Check Version:
Check application documentation or LEADTOOLS about dialog for version informationVerify Fix Applied:
Verify LEADTOOLS version is 20.5 or later and test with the proof-of-concept TIF file from Talos.📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing TIF files
- Memory access violation errors in application logs
Network Indicators:
- Unusual outbound connections after TIF file processing
- File uploads of TIF files to web applications
SIEM Query:
EventID=1000 OR EventID=1001 AND SourceName contains "LEADTOOLS" OR ProcessName contains LEADTOOLS application