CVE-2020-3922
📋 TL;DR
CVE-2020-3922 is a critical SQL injection vulnerability in ArmorX's LisoMail software that allows unauthenticated attackers to execute arbitrary SQL commands via URL parameter manipulation. This enables complete database compromise including data theft, modification, or deletion. Organizations using vulnerable versions of LisoMail are affected.
💻 Affected Systems
- ArmorX LisoMail
📦 What is this software?
Lisomail by Armorx
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data exfiltration, data destruction, privilege escalation to system-level access, and potential lateral movement within the network.
Likely Case
Unauthenticated attackers extract sensitive email data, user credentials, and configuration information from the database, potentially leading to further attacks.
If Mitigated
With proper input validation and parameterized queries, the vulnerability is eliminated and database access requires proper authentication.
🎯 Exploit Status
SQL injection via URL parameters is a well-understood attack vector with public proof-of-concept available, making exploitation straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Specific version not explicitly stated, but ArmorX released patches in response to the vulnerability
Vendor Advisory: Not provided in references, but ArmorX should be contacted directly for advisory
Restart Required: Yes
Instructions:
1. Contact ArmorX for the latest patched version of LisoMail. 2. Backup current configuration and data. 3. Apply the vendor-provided patch. 4. Restart LisoMail services. 5. Verify the fix by testing URL parameter injection attempts.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block malicious URL parameter attempts
Network Segmentation
allRestrict network access to LisoMail instances to only authorized users and systems
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries in the application code
- Deploy database monitoring and alerting for unusual SQL query patterns
🔍 How to Verify
Check if Vulnerable:
Test URL parameters with SQL injection payloads (e.g., adding ' OR '1'='1 to parameters) and observe if database errors or unexpected data is returnedCheck Version:
Check LisoMail administration interface or contact ArmorX support for version informationVerify Fix Applied:
Attempt the same SQL injection tests after patching; successful fix should return proper error handling without database exposure📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed login attempts followed by SQL-like queries in URL parameters
- Database connection errors from unexpected sources
Network Indicators:
- HTTP requests with SQL keywords in URL parameters (SELECT, UNION, INSERT, etc.)
- Unusual database traffic patterns from web servers
SIEM Query:
source="web_logs" AND (url="*SELECT*" OR url="*UNION*" OR url="*INSERT*" OR url="*DELETE*")🔗 References
- https://gist.github.com/tonykuo76/50350af9b77eb51f5ab55964a35f47f2
- https://www.chtsecurity.com/news/2fd99e6e-819f-42b4-a7fe-6bc7eeae155c
- https://www.twcert.org.tw/tw/cp-132-3437-17241-1.html
- https://gist.github.com/tonykuo76/50350af9b77eb51f5ab55964a35f47f2
- https://www.chtsecurity.com/news/2fd99e6e-819f-42b4-a7fe-6bc7eeae155c
- https://www.twcert.org.tw/tw/cp-132-3437-17241-1.html
