CVE-2023-3891
📋 TL;DR
A race condition vulnerability in Lapce v0.2.8 allows attackers to execute arbitrary code with elevated privileges. This affects users running the vulnerable version of the Lapce code editor on their systems. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- Lapce
📦 What is this software?
Lapce by Lapce
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains full system control, installs persistent malware, accesses sensitive data, and pivots to other systems.
Likely Case
Local attacker escalates privileges to install additional payloads, modify system configurations, or access restricted files.
If Mitigated
Attack fails due to proper access controls, sandboxing, or the vulnerability being patched before exploitation.
🎯 Exploit Status
Exploitation requires local access and precise timing due to the race condition nature.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.3.0 and later
Vendor Advisory: https://github.com/lapce/lapce/releases/tag/v0.3.0
Restart Required: Yes
Instructions:
1. Download Lapce v0.3.0 or later from https://lapce.dev or GitHub releases
2. Uninstall the vulnerable version
3. Install the patched version
4. Restart the application
🔧 Temporary Workarounds
Disable or remove Lapce
allUninstall Lapce v0.2.8 to eliminate the vulnerability
sudo apt remove lapce
brew uninstall lapce
Remove via system package manager
🧯 If You Can't Patch
- Restrict user access to systems running vulnerable Lapce versions
- Implement strict privilege separation and monitor for suspicious process creation
🔍 How to Verify
Check if Vulnerable:
Check Lapce version: Run 'lapce --version' or check About dialog in the applicationCheck Version:
lapce --versionVerify Fix Applied:
Confirm version is v0.3.0 or later using 'lapce --version' command📡 Detection & Monitoring
Log Indicators:
- Unusual process creation by Lapce
- Privilege escalation attempts
- Race condition exploitation patterns
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
Process creation where parent_process contains 'lapce' and process_name contains privileged commands