CVE-2021-42013 Detection Scenario by crowdsecurity | CrowdSec Hub

CVE-2021-42013

Attack scenariohttp:exploitMITRE T1190MITRE T1595cve.CVE-2021-42013

By: crowdsecurity
Version: 0.3
Name: crowdsecurity/http-cve-2021-42013
Remediation: Ban

Apache - Path Traversal (CVE-2021-42013)

Install with a top-level collection

16 collections include it

sudo cscli collections install crowdsecurity/whm

Installs 18 parsers and 66 scenarios, via HTTP - CVE Detection.

View WHM →

Installation

sudo cscli scenarios install crowdsecurity/http-cve-2021-42013

Then reload CrowdSec: sudo systemctl reload crowdsec

Configuration

Hover a line or a note to see what each field does.

scenarios/crowdsecurity/http-cve-2021-42013.yaml· 22 linesGitHub

1type: trigger1
2format: 2.0
3#debug: true
4#this is getting funny, it's the third patch on top of cve-2021-41773
5name: crowdsecurity/http-cve-2021-42013
6description: "Apache - Path Traversal (CVE-2021-42013)"
7filter: |2
8  evt.Meta.log_type in ["http_access-log", "http_error-log"] and 
9    Upper(evt.Meta.http_path) contains "/%%32%65%%32%65/"
10groupby: "evt.Meta.source_ip"3
11blackhole: 2m4
12labels:
13  service: apache
14  confidence: 3
15  spoofable: 0
16  classification:5
17    - attack.T1190
18    - attack.T1595
19    - cve.CVE-2021-42013
20  behavior: "http:exploit"
21  label: "CVE-2021-42013"
22  remediation: true6

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