CVE-2024-5557
📋 TL;DR
This vulnerability exposes SNMP credentials in log files due to sensitive information being written to logs. Attackers who gain access to controller logs can extract SNMP credentials, potentially compromising network management systems. This affects Schneider Electric controllers with vulnerable logging configurations.
💻 Affected Systems
- Schneider Electric controllers (specific models not detailed in provided references)
📦 What is this software?
Spacelogic As B Firmware by Schneider Electric
Spacelogic As P Firmware by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
SNMP credentials are stolen from logs, allowing attackers to gain administrative access to network devices, modify configurations, disrupt operations, or pivot to other systems.
Likely Case
Attackers with existing access to log files extract SNMP credentials, enabling unauthorized SNMP operations and potential network reconnaissance.
If Mitigated
With proper log access controls and credential rotation, impact is limited to credential exposure without immediate exploitation.
🎯 Exploit Status
Exploitation requires access to log files, which typically requires some level of system access. Once logs are accessed, credential extraction is straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references - check vendor advisory
Vendor Advisory: https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2024-163-04&p_enDocType=Security+and+Safety+Notice&p_File_Name=SEVD-2024-163-04.pdf
Restart Required: Yes
Instructions:
1. Download the patch from Schneider Electric's security advisory. 2. Apply the firmware update following vendor instructions. 3. Restart the controller. 4. Verify the fix by checking that SNMP credentials no longer appear in logs.
🔧 Temporary Workarounds
Disable sensitive logging
allConfigure logging to exclude SNMP credentials and other sensitive information
Consult vendor documentation for specific logging configuration commands
Restrict log file access
linuxApply strict file permissions to log directories and files
chmod 600 /path/to/logs/*
chown root:root /path/to/logs/*
🧯 If You Can't Patch
- Implement strict access controls on log directories and files
- Rotate SNMP credentials regularly and monitor for unauthorized SNMP activity
🔍 How to Verify
Check if Vulnerable:
Review controller log files for presence of SNMP credentials (community strings, usernames, passwords)Check Version:
Consult vendor documentation for firmware version check command specific to the controller modelVerify Fix Applied:
After patching, verify that SNMP credentials no longer appear in log files and test SNMP functionality📡 Detection & Monitoring
Log Indicators:
- SNMP community strings or credentials appearing in log files
- Unauthorized access attempts to log directories
Network Indicators:
- Unexpected SNMP traffic from unusual sources
- SNMP configuration changes from unauthorized IPs
SIEM Query:
source="controller_logs" AND ("SNMP" OR "community" OR "credential")