WS_FTP - RCE WAF Rule by crowdsecurity | CrowdSec Hub

WS_FTP - RCE

WAF rulehttp:exploitcve.CVE-2023-40044MITRE T1595MITRE T1190cwe.CWE-502

By: crowdsecurity
Version: 0.4
Name: crowdsecurity/vpatch-CVE-2023-40044

WS_FTP .NET deserialize RCE (CVE-2023-40044)

Install with a top-level collection

1 collection include it

sudo cscli collections install ZoeyVid/npmplus

Installs 5 parsers and 54 scenarios, via WAF - Virtual Patching.

View NPMplus →

Installation

sudo cscli appsec-rules install crowdsecurity/vpatch-CVE-2023-40044

Then reload CrowdSec: sudo systemctl reload crowdsec

Configuration

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

appsec-rules/crowdsecurity/vpatch-CVE-2023-40044.yaml· 38 linesGitHub

1name: crowdsecurity/vpatch-CVE-2023-40044
2description: "WS_FTP .NET deserialize RCE (CVE-2023-40044)"
3rules:1
4  - and:
5    - zones:2
6      - URI
7      transform:3
8      - lowercase
9      match:4
10        type: endsWith
11        value: /aht/
12    - zones:2
13      - METHOD
14      match:4
15        type: equals
16        value: POST
17    - zones:2
18      - BODY_ARGS
19      transform:3
20      - b64decode
21      - lowercase
22      match:4
23        type: contains
24        value: "<s:string>cmd</s:string>"
25labels:5
26  type: exploit
27  service: http
28  confidence: 3
29  spoofable: 0
30  behavior: "http:exploit"
31  label: "WS_FTP - RCE"
32  classification:
33   - cve.CVE-2023-40044
34   - attack.T1595
35   - attack.T1190
36   - cwe.CWE-502
37
38

WS_FTP - RCE

Installation

Configuration

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