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Thinfinity VirtualUI User Enumeration

ID: CVE-2021-44848

Severity: medium

Author: danielmofer

Tags: cve2021,cve,exposure,thinfinity,packetstorm,virtualui,tenable,cybelesoft

Description

Section titled “Description”

Thinfinity VirtualUI (before v3.0), /changePassword returns different responses for requests depending on whether the username exists. It may enumerate OS users (Administrator, Guest, etc.)

YAML Source

Section titled “YAML Source”
id: CVE-2021-44848


info:
  name: Thinfinity VirtualUI User Enumeration
  author: danielmofer
  severity: medium
  description: Thinfinity VirtualUI (before v3.0), /changePassword returns different responses for requests depending on whether the username exists. It may enumerate OS users (Administrator, Guest, etc.)
  impact: |
    An attacker can use the gathered usernames for further attacks, such as brute-forcing passwords or launching targeted phishing campaigns.
  remediation: |
    Apply the vendor-supplied patch or upgrade to the latest version of Thinfinity VirtualUI to mitigate the user enumeration vulnerability.
  reference:
    - https://github.com/cybelesoft/virtualui/issues/1
    - https://nvd.nist.gov/vuln/detail/CVE-2021-44848
    - https://www.tenable.com/cve/CVE-2021-44848
    - http://packetstormsecurity.com/files/165327/Cibele-Thinfinity-VirtualUI-2.5.41.0-User-Enumeration.html
    - https://github.com/ARPSyndicate/cvemon
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2021-44848
    cwe-id: CWE-203
    epss-score: 0.02038
    epss-percentile: 0.8871
    cpe: cpe:2.3:a:cybelesoft:thinfinity_virtualui:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: cybelesoft
    product: thinfinity_virtualui
    shodan-query: http.title:"thinfinity virtualui"
    fofa-query: title="thinfinity virtualui"
    google-query: intitle:"thinfinity virtualui"
  tags: cve2021,cve,exposure,thinfinity,packetstorm,virtualui,tenable,cybelesoft


http:
  - raw:
      - |
        GET /changePassword?username=administrator HTTP/1.1
        Host: {{Hostname}}


    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - '"rc":(.*?)'
          - '"msg":"(.*?)"'
        condition: and


      - type: status
        status:
          - 200
# digest: 490a00463044022024886ef05a8d7ff9959f8c122f426a0a0666d3a7a0c79e367dba7281c2bd421902204152d215f678d84aa30c495ad4760e18d5d5324c46adacaa72339f9ff29ab630:922c64590222798bb761d5b6d8e72950

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/2021/CVE-2021-44848.yaml"

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