CVE-2025-1811
📋 TL;DR
This critical SQL injection vulnerability in AT Software Solutions ATSVD allows attackers to execute arbitrary SQL commands via the txtUsuario parameter in the login endpoint. Remote attackers can potentially bypass authentication, access sensitive data, or compromise the database server. All systems running ATSVD up to version 3.4.1 are affected.
💻 Affected Systems
- AT Software Solutions ATSVD
⚠️ 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 leading to data theft, authentication bypass, privilege escalation, and potential remote code execution on the database server.
Likely Case
Authentication bypass allowing unauthorized access to the application, data exfiltration from the database, and potential lateral movement within the network.
If Mitigated
Limited impact with proper input validation and WAF rules blocking SQL injection patterns, though some risk remains if controls are bypassed.
🎯 Exploit Status
Exploit code is publicly available and targets the login page which is typically accessible without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.4.2
Vendor Advisory: Not provided in references
Restart Required: Yes
Instructions:
1. Download ATSVD version 3.4.2 from official vendor sources
2. Backup current installation and database
3. Stop ATSVD service
4. Install/upgrade to version 3.4.2
5. Restart ATSVD service
6. Verify functionality
🔧 Temporary Workarounds
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns targeting the /login.aspx endpoint and txtUsuario parameter.
Input Validation Filter
allImplement application-level input validation to sanitize the txtUsuario parameter before processing.
🧯 If You Can't Patch
- Isolate the ATSVD server from internet access and restrict internal access to authorized users only.
- Implement network segmentation and monitor all traffic to the /login.aspx endpoint for suspicious patterns.
🔍 How to Verify
Check if Vulnerable:
Check the ATSVD version in the application interface or configuration files. If version is 3.4.1 or earlier, the system is vulnerable.Check Version:
Check application web interface or configuration files for version informationVerify Fix Applied:
After upgrading to 3.4.2, attempt to reproduce the SQL injection using the public exploit to confirm it's no longer effective.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed login attempts with SQL injection patterns
- Successful logins from unexpected IP addresses
Network Indicators:
- HTTP POST requests to /login.aspx containing SQL keywords in txtUsuario parameter
- Unusual database query patterns from application server
SIEM Query:
source="atsvd_logs" AND (url="/login.aspx" AND (txtUsuario CONTAINS "' OR" OR txtUsuario CONTAINS "UNION" OR txtUsuario CONTAINS "SELECT"))