CVE-2025-15063
📋 TL;DR
This is a critical command injection vulnerability in Ollama MCP Server that allows remote attackers to execute arbitrary system commands without authentication. Attackers can gain full control of affected servers by exploiting improper input validation in the execAsync method. All deployments of vulnerable Ollama MCP Server versions are affected.
💻 Affected Systems
- Ollama MCP Server
⚠️ 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 system compromise with attacker gaining root/system-level access, data exfiltration, ransomware deployment, and persistent backdoor installation.
Likely Case
Remote code execution leading to service disruption, credential theft, and lateral movement within the network.
If Mitigated
Limited impact if server runs with minimal privileges, network segmentation prevents lateral movement, and strict egress filtering is in place.
🎯 Exploit Status
Exploitation requires sending specially crafted requests to the vulnerable endpoint. No authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific version
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-26-020/
Restart Required: Yes
Instructions:
1. Check current Ollama MCP Server version
2. Update to the latest patched version from official sources
3. Restart the Ollama MCP Server service
4. Verify the update was successful
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to Ollama MCP Server to trusted IPs only
iptables -A INPUT -p tcp --dport [OLLAMA_PORT] -s [TRUSTED_IP] -j ACCEPT
iptables -A INPUT -p tcp --dport [OLLAMA_PORT] -j DROP
Service Account Privilege Reduction
linuxRun Ollama MCP Server with minimal privileges
sudo useradd -r -s /bin/false ollama-user
sudo chown -R ollama-user:ollama-user /path/to/ollama
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Ollama MCP Server from critical systems
- Deploy application-level firewall or WAF with command injection detection rules
🔍 How to Verify
Check if Vulnerable:
Check if Ollama MCP Server version is older than the patched release. Review server logs for unusual execAsync method calls.Check Version:
ollama --version or check service logs for version informationVerify Fix Applied:
Verify Ollama MCP Server is running the patched version and test that command injection attempts are properly rejected.📡 Detection & Monitoring
Log Indicators:
- Unusual execAsync method calls with shell metacharacters
- Unexpected process spawns from Ollama service account
- Failed authentication attempts followed by command execution attempts
Network Indicators:
- Unusual outbound connections from Ollama server
- Traffic to known malicious IPs or domains
- Unexpected protocol usage from Ollama service
SIEM Query:
source="ollama.log" AND ("execAsync" OR "system call" OR "command injection")