On Wednesday 24 August 2022 at 10:35 UTC, a CLDAP reflection targeted a electronics retail customer in Latin America. The attack peaked at 139.3 Gbps and lasted 149 minutes. Traffic originated from 447 autonomous systems in 87 countries, predominantly compromised cloud VMs.
| Vector | CLDAP reflection |
| Peak | 139.3 Gbps |
| Duration | 149 min |
| Time to mitigation | 0.454 s |
| Attack traffic reaching origin | 0.016% |
| Legitimate traffic challenged | 0.80% |
Timeline
The attack was preceded by no stated motive. Edge packet filters identified the flood by source port and payload signature and dropped it at line rate across 14 points of presence.
What the customer saw
A brief increase in p99 latency of 199 ms during the first minute, then normal service.
Recommendations
- Enable log streaming to your SIEM for faster correlation.
- Lower challenge thresholds on authentication endpoints during high-risk events.
- Review allow-listed partner ranges quarterly.