CVE-2021-47777
📋 TL;DR
Build Smart ERP 21.0817 contains an unauthenticated SQL injection vulnerability in the login validation endpoint. Attackers can execute arbitrary SQL commands without authentication, potentially extracting or modifying database information. All systems running the vulnerable version are affected.
💻 Affected Systems
- Build Smart ERP
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data theft, modification, deletion, or potential remote code execution via database functions.
Likely Case
Data exfiltration of sensitive ERP information, authentication bypass, or database manipulation.
If Mitigated
Limited impact if proper network segmentation, WAF rules, and input validation are in place.
🎯 Exploit Status
Exploit code is publicly available and requires no authentication. Simple SQL injection techniques work.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://ribccs.com/solutions/solution-buildsmart
Restart Required: No
Instructions:
1. Contact Build Smart vendor for patch information. 2. Apply any available updates. 3. Test functionality after patching.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allImplement WAF rules to block SQL injection patterns targeting the 'eidValue' parameter.
Network Segmentation
allRestrict access to the ERP system to authorized internal networks only.
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries in the application code.
- Deploy a web application firewall with SQL injection detection rules.
🔍 How to Verify
Check if Vulnerable:
Send a POST request to the login validation endpoint with payload: ';WAITFOR DELAY '0:0:3'-- in the eidValue parameter and observe delayed response.Check Version:
Check ERP system version in admin interface or configuration files.Verify Fix Applied:
Test with the same payload and ensure no SQL injection occurs and response time is normal.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple failed login attempts with SQL patterns
- Long database query execution times
Network Indicators:
- HTTP POST requests to login endpoint containing SQL keywords like WAITFOR, SELECT, UNION
SIEM Query:
source="web_logs" AND (uri="/login_validation" OR uri="*login*") AND (request_body="*WAITFOR*" OR request_body="*SELECT*" OR request_body="*UNION*")