CVE-2025-56157
📋 TL;DR
CVE-2025-56157 exposes Dify installations to unauthorized database access through hardcoded PostgreSQL credentials in docker-compose.yaml. Attackers can gain full control over the PostgreSQL database if the service is exposed. This affects Dify users who deploy from source code with default configurations.
💻 Affected Systems
- Dify
📦 What is this software?
Dify by Langgenius
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of PostgreSQL database leading to data theft, data manipulation, privilege escalation, and potential lateral movement to other systems.
Likely Case
Unauthorized database access allowing attackers to read sensitive application data, modify configurations, or disrupt service availability.
If Mitigated
Limited impact if PostgreSQL port 5432 is not exposed to untrusted networks and proper network segmentation is implemented.
🎯 Exploit Status
Exploitation requires network access to PostgreSQL port 5432. Credentials are publicly visible in source code.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GitHub issue #15285 for latest patched version
Vendor Advisory: https://github.com/langgenius/dify/issues/15285
Restart Required: Yes
Instructions:
1. Update to latest Dify version. 2. Modify docker-compose.yaml to use secure credentials. 3. Restart Docker containers. 4. Rotate PostgreSQL credentials.
🔧 Temporary Workarounds
Change PostgreSQL Credentials
linuxManually update PostgreSQL username and password in docker-compose.yaml
sed -i 's/POSTGRES_USER=.*/POSTGRES_USER=new_secure_user/' docker-compose.yaml
sed -i 's/POSTGRES_PASSWORD=.*/POSTGRES_PASSWORD=new_secure_password/' docker-compose.yaml
Restrict Network Access
allEnsure PostgreSQL port 5432 is not exposed to untrusted networks
docker-compose down
Edit docker-compose.yaml to remove port 5432 exposure
docker-compose up -d
🧯 If You Can't Patch
- Implement network segmentation to restrict access to PostgreSQL port 5432
- Use firewall rules to block external access to port 5432
🔍 How to Verify
Check if Vulnerable:
Check docker-compose.yaml for hardcoded PostgreSQL credentials: grep -E 'POSTGRES_USER|POSTGRES_PASSWORD' docker-compose.yamlCheck Version:
Check Dify version in web interface or docker-compose.yamlVerify Fix Applied:
Verify credentials are changed and PostgreSQL port is not exposed: docker-compose config | grep -E '5432|POSTGRES_'📡 Detection & Monitoring
Log Indicators:
- Failed PostgreSQL authentication attempts
- Successful logins with default credentials
Network Indicators:
- External connections to port 5432
- Database queries from unexpected sources
SIEM Query:
source="postgresql" AND (user="dify" OR failed_authentication)🔗 References
- http://dify.com
- https://gist.github.com/Cristliu/216ddbadaf3258498c93d408683ecabd
- https://gist.github.com/Cristliu/298f51cbc72c45d91632cd0d65aa8161
- https://github.com/langgenius/dify
- https://github.com/langgenius/dify/issues/15285
- https://github.com/langgenius/dify/pull/15286
- https://github.com/langgenius/dify/pull/15286.diff
- https://github.com/langgenius/dify/releases/tag/1.0.1
- https://gist.github.com/Cristliu/216ddbadaf3258498c93d408683ecabd
