CVE-2025-9176
📋 TL;DR
This CVE describes a command injection vulnerability in neurobin shc versions up to 4.0.3. Attackers with local access can execute arbitrary operating system commands by manipulating environment variables during the compilation process. This affects systems where shc is installed and used to compile shell scripts.
💻 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, but still allows unauthorized command execution within user's privilege level.
🎯 Exploit Status
Exploit details have been publicly released. Attack requires local access and knowledge of how to manipulate environment variables during shc compilation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.0.4 or later
Vendor Advisory: https://github.com/neurobin/shc/releases
Restart Required: No
Instructions:
1. Check current version with 'shc --version'. 2. Update to version 4.0.4 or later via package manager or compile from source. 3. Verify update with 'shc --version'.
🔧 Temporary Workarounds
Restrict shc usage
allLimit use of shc to trusted users only and monitor for suspicious compilation activities.
🧯 If You Can't Patch
- Remove or disable shc from production systems if not essential
- Implement strict access controls and monitor for unauthorized shc usage
🔍 How to Verify
Check if Vulnerable:
Run 'shc --version' and check if version is 4.0.3 or earlier.Check Version:
shc --versionVerify Fix Applied:
After updating, run 'shc --version' to confirm version is 4.0.4 or later.📡 Detection & Monitoring
Log Indicators:
- Unusual shc compilation activities
- Suspicious environment variable manipulation during compilation
Network Indicators:
- N/A - local exploitation only
SIEM Query:
Process execution logs showing shc with unusual arguments or environment variables🔗 References
- https://magnificent-dill-351.notion.site/Command-Execution-of-env-in-shc-4-0-3-249c693918ed80c997f4e9420f945d01
- https://vuldb.com/?ctiid.320557
- https://vuldb.com/?id.320557
- https://vuldb.com/?submit.630744
- https://magnificent-dill-351.notion.site/Command-Execution-of-env-in-shc-4-0-3-249c693918ed80c997f4e9420f945d01
