CVE-2023-27821
📋 TL;DR
Databasir v1.0.7 contains a remote code execution vulnerability in the mockDataScript parameter that allows attackers to execute arbitrary code on affected systems. This affects all deployments running the vulnerable version, potentially compromising the entire server environment.
💻 Affected Systems
- Databasir
📦 What is this software?
Databasir by Databasir
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise leading to data theft, ransomware deployment, lateral movement within the network, and persistent backdoor installation.
Likely Case
Server takeover allowing database credential theft, data exfiltration, and use as pivot point for further attacks.
If Mitigated
Limited impact if proper network segmentation, least privilege, and input validation are implemented.
🎯 Exploit Status
Public proof-of-concept available on GitHub demonstrates trivial exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.0.8 or later
Vendor Advisory: https://github.com/vran-dev/databasir/issues/269
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Stop Databasir service. 3. Update to v1.0.8 or later. 4. Restart Databasir service. 5. Verify functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation for mockDataScript parameter to block malicious payloads.
# Requires application code modification to sanitize mockDataScript input
Network Access Control
linuxRestrict access to Databasir interface using firewall rules or network segmentation.
iptables -A INPUT -p tcp --dport [DATABASIR_PORT] -s [TRUSTED_IPS] -j ACCEPT
iptables -A INPUT -p tcp --dport [DATABASIR_PORT] -j DROP
🧯 If You Can't Patch
- Immediately isolate affected systems from production networks.
- Implement strict network monitoring and alerting for exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check Databasir version via web interface or configuration files. If version is exactly 1.0.7, system is vulnerable.Check Version:
Check application logs, configuration files, or use: curl -s http://localhost:[PORT]/api/versionVerify Fix Applied:
Verify version is 1.0.8 or later and test mockDataScript functionality with safe inputs.📡 Detection & Monitoring
Log Indicators:
- Unusual script execution in mockDataScript parameter
- System command execution from web process
- Abnormal process spawning
Network Indicators:
- HTTP requests containing shell commands in mockDataScript parameter
- Outbound connections from Databasir to unexpected destinations
SIEM Query:
source="databasir" AND (mockDataScript CONTAINS "exec" OR mockDataScript CONTAINS "system" OR mockDataScript CONTAINS "Runtime.getRuntime")