CVE-2024-42850
📋 TL;DR
This vulnerability in Silverpeas allows attackers to bypass password complexity requirements when changing passwords, potentially enabling weak password usage. It affects Silverpeas v6.4.2 and lower versions. This could allow attackers to set weak passwords for user accounts they control or potentially for other accounts through privilege escalation.
💻 Affected Systems
- Silverpeas
📦 What is this software?
Silverpeas by Silverpeas
⚠️ Risk & Real-World Impact
Worst Case
Attackers could set weak passwords for administrative accounts, gain full system control, and compromise all data and functionality.
Likely Case
Attackers with existing access could set weak passwords for accounts they control, making them easier to brute-force or maintain persistence.
If Mitigated
With strong authentication controls and monitoring, impact is limited to potential weak passwords on compromised accounts.
🎯 Exploit Status
Exploitation requires authentication to access password change functionality. Public PoC available on GitHub.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v6.4.3 or later
Vendor Advisory: http://silverpeas.com
Restart Required: Yes
Instructions:
1. Backup your Silverpeas installation and database. 2. Download and install Silverpeas v6.4.3 or later from official sources. 3. Follow upgrade documentation for your specific deployment. 4. Restart Silverpeas services. 5. Verify password complexity enforcement is working.
🔧 Temporary Workarounds
Enforce Password Policy at Application Layer
allImplement additional password validation in custom authentication modules or middleware
Disable Password Self-Service
allTemporarily disable password change functionality for users
🧯 If You Can't Patch
- Implement network segmentation to isolate Silverpeas instances
- Enable detailed logging and monitoring of password change attempts
🔍 How to Verify
Check if Vulnerable:
Check Silverpeas version in administration panel or by examining installation files. Versions 6.4.2 and lower are vulnerable.Check Version:
Check web interface admin panel or examine silverpeas-version.properties fileVerify Fix Applied:
Attempt to change a password with insufficient complexity - should be rejected. Verify version is 6.4.3 or higher.📡 Detection & Monitoring
Log Indicators:
- Multiple failed password change attempts
- Password changes with simple patterns
- Unusual user account password modifications
Network Indicators:
- HTTP POST requests to password change endpoints with weak password parameters
SIEM Query:
source="silverpeas" AND (event="password_change" OR event="user_update") AND password_length<8