CVE-2023-51770
📋 TL;DR
CVE-2023-51770 is an arbitrary file read vulnerability in Apache DolphinScheduler that allows attackers to read sensitive files from the server filesystem. This affects all Apache DolphinScheduler installations before version 3.2.1. The vulnerability stems from improper input validation in file handling functionality.
💻 Affected Systems
- Apache DolphinScheduler
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read sensitive configuration files, database credentials, SSH keys, or other critical system files, potentially leading to full system compromise.
Likely Case
Unauthorized reading of sensitive configuration files containing credentials or API keys, enabling further attacks.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external exploitation attempts.
🎯 Exploit Status
Exploitation requires authenticated access but is technically simple once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.2.1
Vendor Advisory: https://lists.apache.org/thread/gpks573kn00ofxn7n9gkg6o47d03p5rw
Restart Required: Yes
Instructions:
1. Backup your current installation and configuration
2. Download Apache DolphinScheduler 3.2.1 from official sources
3. Stop the DolphinScheduler service
4. Replace the installation with version 3.2.1
5. Restart the DolphinScheduler service
6. Verify the upgrade was successful
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict network access to DolphinScheduler to only trusted IP addresses
# Example iptables rule: iptables -A INPUT -p tcp --dport [DolphinScheduler_port] -s [trusted_IP] -j ACCEPT
# Then: iptables -A INPUT -p tcp --dport [DolphinScheduler_port] -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to limit who can access the DolphinScheduler interface
- Monitor file access logs for unusual read patterns and implement alerting
🔍 How to Verify
Check if Vulnerable:
Check the DolphinScheduler version in the web interface or configuration files. If version is below 3.2.1, the system is vulnerable.Check Version:
Check the version in the web interface at /dolphinscheduler/ui or examine the installation directory for version files.Verify Fix Applied:
After upgrading, verify the version shows 3.2.1 or higher in the web interface or via version check command.📡 Detection & Monitoring
Log Indicators:
- Unusual file read patterns in application logs
- Access to sensitive file paths from DolphinScheduler processes
- Multiple failed file access attempts
Network Indicators:
- Unusual HTTP requests to file-related endpoints
- Requests with path traversal patterns (../)
SIEM Query:
source="dolphinscheduler" AND (path="*../*" OR file="*sensitive*" OR status=200 AND uri="*/file/*")🔗 References
- http://www.openwall.com/lists/oss-security/2024/02/20/2
- https://github.com/apache/dolphinscheduler/pull/15433
- https://lists.apache.org/thread/4t8bdjqnfhldh73gy9p0whlgvnnbtn7g
- https://lists.apache.org/thread/gpks573kn00ofxn7n9gkg6o47d03p5rw
- http://www.openwall.com/lists/oss-security/2024/02/20/2
- https://github.com/apache/dolphinscheduler/pull/15433
- https://lists.apache.org/thread/4t8bdjqnfhldh73gy9p0whlgvnnbtn7g
- https://lists.apache.org/thread/gpks573kn00ofxn7n9gkg6o47d03p5rw
