CVE-2025-2813
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to cause Denial of Service by flooding an HTTP service on port 80 with excessive requests. Systems running vulnerable HTTP services with port 80 exposed are affected. The attack requires no authentication and can be performed from any network location.
💻 Affected Systems
- Specific product information not provided in CVE description
⚠️ 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 service unavailability for legitimate users, potentially leading to business disruption and financial losses.
Likely Case
Service degradation or temporary unavailability during attack periods, affecting user experience and application functionality.
If Mitigated
Minimal impact with proper rate limiting, DDoS protection, and network segmentation in place.
🎯 Exploit Status
This is a simple volumetric DoS attack that requires minimal technical skill to execute. Attackers only need to send numerous HTTP requests to the target.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://certvde.com/en/advisories/VDE-2025-029/
Restart Required: No
Instructions:
1. Review the vendor advisory at the provided URL. 2. Identify if your specific HTTP service is affected. 3. Apply vendor-specific patches if available. 4. If no patch exists, implement workarounds and monitor for updates.
🔧 Temporary Workarounds
Implement Rate Limiting
allConfigure rate limiting on HTTP services to restrict request frequency from individual IP addresses
# Example for nginx: limit_req_zone $binary_remote_addr zone=one:10m rate=10r/s;
# Example for Apache: SetEnvIf Remote_Addr "^192\.168\.1\." dontthrottle
ModSecurity: SecRule REQUEST_HEADERS:User-Agent "@pmFromFile dos-agents.data" "id:1000,phase:1,t:none,log,deny,status:403"
Configure Web Application Firewall
allDeploy WAF with DoS protection rules to filter malicious traffic patterns
# Cloudflare: Configure rate limiting rules in dashboard
# AWS WAF: Create rate-based rules in AWS Console
# ModSecurity: Enable DoS protection rules in configuration
🧯 If You Can't Patch
- Implement network-level rate limiting using firewall or load balancer
- Use DDoS protection services (Cloudflare, AWS Shield, etc.)
🔍 How to Verify
Check if Vulnerable:
Test if HTTP service on port 80 accepts connections and responds to requests without rate limiting. Use tools like ab (Apache Bench) or wrk to simulate request floods.Check Version:
Check HTTP service version: curl -I http://target/ or netstat -tulpn | grep :80Verify Fix Applied:
After implementing controls, test with simulated attack traffic to verify service remains available and responsive.📡 Detection & Monitoring
Log Indicators:
- Unusually high request counts from single IP addresses
- Increased error rates (503, 429)
- Request patterns showing identical requests in rapid succession
Network Indicators:
- High bandwidth consumption on port 80
- SYN flood patterns to port 80
- Abnormal request/response ratios
SIEM Query:
source="web_server_logs" | stats count by src_ip | where count > 1000 | sort -count