CVE-2021-38159
📋 TL;DR
CVE-2021-38159 is a critical SQL injection vulnerability in Progress MOVEit Transfer that allows unauthenticated remote attackers to execute arbitrary SQL commands against the database. This could lead to data theft, database manipulation, or complete system compromise. All MOVEit Transfer installations running affected versions are vulnerable.
💻 Affected Systems
- Progress MOVEit Transfer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data exfiltration, data destruction, privilege escalation to operating system, and potential ransomware deployment.
Likely Case
Database information disclosure, data manipulation, and potential credential theft leading to further system access.
If Mitigated
Limited impact with proper network segmentation, WAF rules blocking SQL injection patterns, and database user privilege restrictions.
🎯 Exploit Status
Multiple public proof-of-concept exploits exist. The vulnerability is actively exploited in the wild, particularly by ransomware groups targeting file transfer systems.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2019.0.8 (11.0.8), 2019.1.7 (11.1.7), 2019.2.4 (11.2.4), 2020.0.7 (12.0.7), 2020.1.6 (12.1.6), or 2021.0.4 (13.0.4) depending on your version
Vendor Advisory: https://community.progress.com/s/article/MOVEit-Transfer-Vulnerability-August-6-2021
Restart Required: Yes
Instructions:
1. Backup your MOVEit Transfer database and configuration. 2. Download the appropriate patch from Progress Software support portal. 3. Stop MOVEit Transfer services. 4. Apply the patch following vendor instructions. 5. Restart services and verify functionality.
🔧 Temporary Workarounds
Web Application Firewall Rules
allImplement WAF rules to block SQL injection patterns targeting MOVEit Transfer endpoints
WAF-specific configuration - implement rules blocking patterns like UNION SELECT, information_schema queries, and SQL comment sequences
Network Segmentation
allRestrict access to MOVEit Transfer to only trusted IP addresses
firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="TRUSTED_IP" port protocol="tcp" port="443" accept' (Linux)
New-NetFirewallRule -DisplayName "MOVEit Access" -Direction Inbound -Protocol TCP -LocalPort 443 -RemoteAddress TRUSTED_IP -Action Allow (Windows)
🧯 If You Can't Patch
- Immediately isolate the MOVEit Transfer server from internet access and restrict to minimal necessary internal network segments
- Implement database user privilege reduction - ensure MOVEit database user has only necessary permissions, not sysadmin/db_owner
🔍 How to Verify
Check if Vulnerable:
Check MOVEit Transfer version in web interface (Admin > About) or examine installed version in Windows Programs & FeaturesCheck Version:
On Windows: Get-WmiObject -Class Win32_Product | Where-Object {$_.Name -like "*MOVEit*"} | Select-Object Name, VersionVerify Fix Applied:
Verify version is patched (2019.0.8+, 2019.1.7+, 2019.2.4+, 2020.0.7+, 2020.1.6+, or 2021.0.4+) and test SQL injection attempts are blocked📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in MOVEit logs
- Multiple failed login attempts followed by SQL syntax in requests
- Database connection errors or unusual query patterns
Network Indicators:
- HTTP requests containing SQL keywords (UNION, SELECT, INFORMATION_SCHEMA) to MOVEit endpoints
- Unusual outbound database connections from MOVEit server
SIEM Query:
source="moveit.logs" AND ("sql" OR "union" OR "select" OR "information_schema") AND status=200