CVE-2025-9174
📋 TL;DR
This vulnerability in neurobin shc up to version 4.0.3 allows local command injection through the filename handler component. Attackers with local access can execute arbitrary operating system commands by manipulating filenames. Only systems running vulnerable versions of shc are affected.
💻 Affected Systems
- neurobin shc
📦 What is this software?
Shc by Neurobin
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation leading to full system compromise, data theft, or lateral movement within the network
Likely Case
Local user gains unauthorized command execution, potentially accessing sensitive files or modifying system configurations
If Mitigated
Limited impact due to proper access controls and monitoring preventing successful exploitation
🎯 Exploit Status
Exploit requires local access and knowledge of vulnerable shc usage patterns
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.0.4 or later
Vendor Advisory: https://github.com/neurobin/shc
Restart Required: No
Instructions:
1. Check current version with 'shc --version' 2. Update via package manager or compile from source 3. Verify update with 'shc --version' showing 4.0.4+
🔧 Temporary Workarounds
Restrict shc usage
allLimit shc execution to trusted users only
chmod 750 /usr/local/bin/shc
setfacl -m u:trusteduser:rx /usr/local/bin/shc
Input validation wrapper
allCreate wrapper script that validates filenames before passing to shc
#!/bin/bash
# Validate filename contains no shell metacharacters
if [[ "$1" =~ [;&|`$\\] ]]; then
echo "Invalid filename"
exit 1
fi
/usr/local/bin/shc "$@"
🧯 If You Can't Patch
- Remove shc from production systems if not essential
- Implement strict file permission controls and monitor shc usage
🔍 How to Verify
Check if Vulnerable:
Run 'shc --version' and check if version is 4.0.3 or earlierCheck Version:
shc --versionVerify Fix Applied:
Confirm version is 4.0.4 or later with 'shc --version'📡 Detection & Monitoring
Log Indicators:
- Unusual shc process execution patterns
- Shell commands executed from shc with suspicious arguments
Network Indicators:
- N/A - local vulnerability only
SIEM Query:
process.name:"shc" AND process.args:*[;&|`$\\]*🔗 References
- https://magnificent-dill-351.notion.site/Command-Execution-in-shc-4-0-3-249c693918ed8040abe3e636c7f18c96
- https://vuldb.com/?ctiid.320555
- https://vuldb.com/?id.320555
- https://vuldb.com/?submit.630742
- https://magnificent-dill-351.notion.site/Command-Execution-in-shc-4-0-3-249c693918ed8040abe3e636c7f18c96
