type: trigger
format: 2.0
#debug: true
name: crowdsecurity/http-cve-2021-41773
description: "cve-2021-41773"
filter: |
  evt.Meta.log_type in ["http_access-log", "http_error-log"] and 
    (Upper(evt.Meta.http_path) contains "/.%2E/.%2E/"
      or
     Upper(evt.Meta.http_path) contains "/%2E%2E/%2E%2E")
groupby: "evt.Meta.source_ip"
blackhole: 2m
labels:
  confidence: 3
  spoofable: 0
  classification:
    - attack.T1190
    - attack.T1595
    - cve.CVE-2021-41773
  behavior: "http:exploit"
  label: "CVE-2021-41773"
  service: apache
  remediation: true