CVE-2023-37574
📋 TL;DR
This vulnerability allows arbitrary code execution when a user opens a specially crafted .vcd file in GTKWave. Attackers can exploit use-after-free flaws in the VCD parsing code to gain control of the victim's system. Anyone using GTKWave to open untrusted .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 of the victim's machine, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation leading to user account compromise, file system access, and potential installation of persistent malware.
If Mitigated
Limited impact if file opening is restricted to trusted sources, with potential application crash but no code execution.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code has been identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.3.116 or later
Vendor Advisory: https://sourceforge.net/p/gtkwave/bugs/
Restart Required: No
Instructions:
1. Download latest GTKWave version from official source. 2. Uninstall current version. 3. Install patched version. 4. Verify installation with version check.
🔧 Temporary Workarounds
Restrict .vcd file handling
allConfigure system to open .vcd files with alternative trusted software or disable automatic opening.
Sandbox GTKWave execution
linuxRun GTKWave in isolated environment or container to limit potential damage from exploitation.
🧯 If You Can't Patch
- Only open .vcd files from trusted, verified sources.
- Use alternative VCD viewer software that is not vulnerable.
🔍 How to Verify
Check if Vulnerable:
Check GTKWave version: gtkwave --version or about dialog in GUI. If version is 3.3.115 or earlier, system is vulnerable.Check Version:
gtkwave --versionVerify Fix Applied:
Verify installed version is 3.3.116 or later using gtkwave --version command.📡 Detection & Monitoring
Log Indicators:
- Unexpected GTKWave crashes when opening .vcd files
- Unusual process creation from GTKWave executable
Network Indicators:
- Outbound connections from GTKWave process to unexpected destinations
SIEM Query:
Process creation where parent_process contains 'gtkwave' AND (command_line contains '.vcd' OR image_path contains suspicious patterns)🔗 References
- https://lists.debian.org/debian-lts-announce/2024/04/msg00007.html
- https://talosintelligence.com/vulnerability_reports/TALOS-2023-1806
- https://lists.debian.org/debian-lts-announce/2024/04/msg00007.html
- https://talosintelligence.com/vulnerability_reports/TALOS-2023-1806
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1806
