On Friday 4 October 2024 at 04:03 UTC, a CLDAP reflection targeted a tax authority portal customer in Central Europe. The attack peaked at 251.4 Gbps and lasted 18 minutes. Traffic originated from 483 autonomous systems in 67 countries, predominantly hijacked home routers.
| Vector | CLDAP reflection |
| Peak | 251.4 Gbps |
| Duration | 18 min |
| Time to mitigation | 0.404 s |
| Attack traffic reaching origin | 0.030% |
| Legitimate traffic challenged | 0.46% |
Timeline
The attack was preceded by a competitor’s product launch. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 35 points of presence.
What the customer saw
Checkout conversion was unchanged compared with the same hour of the previous week.
Recommendations
- Enable log streaming to your SIEM for faster correlation.
- Review allow-listed partner ranges quarterly.
- Lower challenge thresholds on authentication endpoints during high-risk events.