CVE-2023-37443
📋 TL;DR
This vulnerability allows arbitrary code execution when a user opens a malicious VCD file in GTKWave. Attackers can exploit out-of-bounds read vulnerabilities in the VCD parsing code to potentially take control of the victim's system. Anyone using GTKWave to analyze VCD files is affected.
💻 Affected Systems
- GTKWave
📦 What is this software?
Gtkwave by Tonybybell
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the victim's machine, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation or arbitrary code execution in the context of the user running GTKWave, allowing attackers to steal sensitive data or install malware.
If Mitigated
No impact if users don't open untrusted VCD files or if the application is properly sandboxed/isolated.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious file). The vulnerability is in parsing code which typically requires crafted input to trigger.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.3.116 or later
Vendor Advisory: https://sourceforge.net/p/gtkwave/bugs/43/
Restart Required: Yes
Instructions:
1. Download latest version from official GTKWave website or package manager. 2. Uninstall old version. 3. Install new version. 4. Restart system if required.
🔧 Temporary Workarounds
Restrict VCD file processing
allConfigure system to prevent GTKWave from opening untrusted VCD files
chmod -x /usr/bin/gtkwave (Linux)
Remove file associations for .vcd files (Windows)
Use sandboxed environment
allRun GTKWave in isolated container or virtual machine
docker run --rm -v $(pwd):/data gtkwave
Use virtual machine for VCD analysis
🧯 If You Can't Patch
- Implement strict file validation policies - only open VCD files from trusted sources
- Use alternative VCD viewers that are not vulnerable to this specific issue
🔍 How to Verify
Check if Vulnerable:
Check GTKWave version: gtkwave --version | grep '3.3.115' or earlierCheck Version:
gtkwave --versionVerify Fix Applied:
Verify version is 3.3.116 or later: gtkwave --version📡 Detection & Monitoring
Log Indicators:
- GTKWave crash logs with memory access violations
- Unexpected process creation from GTKWave
Network Indicators:
- Outbound connections from GTKWave process to unknown destinations
SIEM Query:
Process:gtkwave AND (EventID:1000 OR EventID:1001) OR ProcessCreation:gtkwave AND ParentProcess:explorer.exe🔗 References
- https://lists.debian.org/debian-lts-announce/2024/04/msg00007.html
- https://talosintelligence.com/vulnerability_reports/TALOS-2023-1805
- https://lists.debian.org/debian-lts-announce/2024/04/msg00007.html
- https://talosintelligence.com/vulnerability_reports/TALOS-2023-1805
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1805
