CVE-2021-41033
📋 TL;DR
This vulnerability allows man-in-the-middle attacks when Eclipse Equinox installations use HTTP repositories for p2 updates. Attackers can intercept and modify update metadata to install malicious plugins that execute arbitrary code. All Eclipse Equinox users who update via HTTP repositories are affected.
💻 Affected Systems
- Eclipse Equinox
📦 What is this software?
Equinox by Eclipse
Equinox by Eclipse
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the Eclipse installation with execution of arbitrary malicious code, potentially leading to system takeover, data theft, or lateral movement.
Likely Case
Installation of malicious plugins that could steal credentials, exfiltrate data, or provide persistent backdoor access.
If Mitigated
No impact if using HTTPS repositories or network controls prevent HTTP MITM attacks.
🎯 Exploit Status
Standard MITM techniques can be used. No authentication required to intercept HTTP traffic.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 4.21
Vendor Advisory: https://bugs.eclipse.org/bugs/show_bug.cgi?id=575688
Restart Required: Yes
Instructions:
1. Update Eclipse Equinox to version after 4.21. 2. Ensure all p2 repositories use HTTPS URLs. 3. Restart Eclipse/Equinox after update.
🔧 Temporary Workarounds
Force HTTPS repositories
allConfigure all p2 repositories to use HTTPS instead of HTTP
Edit Eclipse/Equinox configuration to replace 'http://' with 'https://' in all repository URLs
Network segmentation
allIsolate Eclipse update traffic to trusted networks
Configure firewall rules to restrict HTTP traffic to trusted update servers only
🧯 If You Can't Patch
- Use only HTTPS p2 repositories for all updates
- Implement network monitoring for MITM attacks on HTTP update traffic
🔍 How to Verify
Check if Vulnerable:
Check if any p2 repository URLs in Eclipse/Equinox configuration start with 'http://' instead of 'https://'Check Version:
Check Eclipse About dialog or equinox version fileVerify Fix Applied:
Verify all p2 repository URLs use HTTPS and Equinox version is >4.21📡 Detection & Monitoring
Log Indicators:
- Unexpected plugin installations
- Update failures or warnings about repository security
Network Indicators:
- HTTP traffic to p2 repositories
- Unusual update patterns or sources
SIEM Query:
Search for HTTP requests to p2.eclipse.org or other p2 repositories