CVE-2025-59463
📋 TL;DR
This vulnerability allows attackers to cause chunk-size mismatches during file transfers, blocking current transfers and preventing subsequent ones. It affects systems using vulnerable file transfer protocols or services, particularly in industrial control systems where SICK products are deployed.
💻 Affected Systems
- SICK industrial devices and software with vulnerable file transfer components
📦 What is this software?
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of file transfer services leading to operational disruption in industrial environments where file transfers are critical for configuration updates or data collection.
Likely Case
Temporary disruption of file transfer operations requiring manual intervention to restore service, potentially causing minor operational delays.
If Mitigated
Minimal impact with proper network segmentation and monitoring allowing quick detection and remediation of attack attempts.
🎯 Exploit Status
Exploitation requires understanding of file transfer protocols and ability to manipulate chunk sizes during transfers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check SICK advisory SCA-2025-0013 for specific patched versions
Vendor Advisory: https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0013.json
Restart Required: No
Instructions:
1. Review SICK advisory SCA-2025-0013. 2. Identify affected products and versions. 3. Apply vendor-provided patches or firmware updates. 4. Test file transfer functionality after patching.
🔧 Temporary Workarounds
Network Segmentation
allIsolate file transfer services to internal networks only, preventing external access to vulnerable components.
Transfer Monitoring
allImplement monitoring for abnormal file transfer patterns or repeated transfer failures.
🧯 If You Can't Patch
- Implement strict network access controls to limit who can initiate file transfers
- Deploy intrusion detection systems to monitor for chunk-size manipulation attempts
🔍 How to Verify
Check if Vulnerable:
Check system version against SICK advisory SCA-2025-0013 and verify if using vulnerable file transfer components.Check Version:
Consult device documentation or web interface for firmware/software version informationVerify Fix Applied:
Test file transfer functionality with various file sizes and monitor for successful completions without blocking subsequent transfers.📡 Detection & Monitoring
Log Indicators:
- Multiple failed file transfer attempts
- Abnormal chunk size values in transfer logs
- File transfer service restarts
Network Indicators:
- Unusual patterns in file transfer protocol traffic
- Repeated connection attempts to file transfer ports
SIEM Query:
source="file_transfer_logs" AND (event="transfer_failed" OR event="chunk_error") | stats count by src_ip🔗 References
- https://sick.com/psirt
- https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
- https://www.first.org/cvss/calculator/3.1
- https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0013.json
- https://www.sick.com/.well-known/csaf/white/2025/sca-2025-0013.pdf
- https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf
