CVE-2021-25899
📋 TL;DR
CVE-2021-25899 is a blind time-based SQL injection vulnerability in Void Aural Rec Monitor 9.0.0.1's svc-login.php file. Unauthenticated attackers can exploit the 'param1' parameter to execute arbitrary SQL commands, potentially extracting or manipulating database contents. Organizations using Void Aural Rec Monitor 9.0.0.1 are affected.
💻 Affected Systems
- Void Aural Rec Monitor
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including sensitive data exfiltration, authentication bypass, or remote code execution if database permissions allow.
Likely Case
Data extraction from the database, potentially including user credentials, configuration data, or other sensitive information.
If Mitigated
Limited impact with proper input validation, parameterized queries, and network segmentation in place.
🎯 Exploit Status
Blind SQL injection requires time-based techniques but is well-documented with public proof-of-concept available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
1. Check vendor website for updated version
2. Apply any available patches
3. Verify the fix by testing the vulnerable endpoint
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block malicious requests.
Input Validation Filter
allImplement input validation to sanitize the param1 parameter before processing.
🧯 If You Can't Patch
- Isolate the vulnerable system behind a firewall with strict access controls
- Implement network segmentation to limit potential lateral movement
🔍 How to Verify
Check if Vulnerable:
Send a crafted HTTP request to svc-login.php with a time-based SQL payload in param1 parameter and measure response time.Check Version:
Check software version in administration interface or configuration files.Verify Fix Applied:
Test the same payload after remediation; successful fix should return consistent response times regardless of payload.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL syntax in param1 parameter
- Multiple failed login attempts with SQL-like patterns
- Abnormal response times from svc-login.php
Network Indicators:
- HTTP requests to svc-login.php containing SQL keywords in parameters
- Unusual traffic patterns to the login endpoint
SIEM Query:
source="web_logs" AND uri="*svc-login.php*" AND (param1="*SLEEP*" OR param1="*WAITFOR*" OR param1="*BENCHMARK*")🔗 References
- https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/all-your-databases-belong-to-me-a-blind-sqli-case-study/
- https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=28765
- https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/all-your-databases-belong-to-me-a-blind-sqli-case-study/
- https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=28765
