CVE-2023-48388
📋 TL;DR
Multisuns EasyLog web+ uses hard-coded credentials that allow remote attackers to gain unauthorized access. This vulnerability enables attackers to perform arbitrary system operations or disrupt service. All systems running vulnerable versions of EasyLog web+ are affected.
💻 Affected Systems
- Multisuns EasyLog web+
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing data theft, ransomware deployment, or permanent service disruption
Likely Case
Unauthorized access leading to data exfiltration, configuration changes, or service interruption
If Mitigated
Limited impact if network segmentation and access controls prevent external access
🎯 Exploit Status
Exploitation requires only knowledge of hard-coded credentials, which may be publicly available
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific version
Vendor Advisory: https://www.twcert.org.tw/tw/cp-132-7603-b1061-1.html
Restart Required: Yes
Instructions:
1. Contact Multisuns for patched version 2. Apply patch following vendor instructions 3. Restart affected services 4. Change all credentials
🔧 Temporary Workarounds
Network Isolation
linuxRestrict network access to EasyLog web+ systems
firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="TRUSTED_NETWORK" port protocol="tcp" port="PORT" accept'
firewall-cmd --reload
Credential Rotation
allChange all system credentials if possible
# Check documentation for credential change procedures
🧯 If You Can't Patch
- Isolate affected systems from internet and untrusted networks
- Implement strict network access controls and monitor for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check if system is running EasyLog web+ and review vendor advisory for version informationCheck Version:
# Check EasyLog web+ version through admin interface or configuration filesVerify Fix Applied:
Verify patch installation and test that hard-coded credentials no longer work📡 Detection & Monitoring
Log Indicators:
- Failed login attempts with hard-coded credentials
- Unauthorized access from unexpected IPs
- Configuration changes by unknown users
Network Indicators:
- Authentication attempts to EasyLog web+ from external sources
- Unusual traffic patterns to/from affected systems
SIEM Query:
source="easylog" AND (event_type="authentication" AND result="success" AND user="HARDCODED_USER")