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SaltStack <=3002 - Shell Injection

ID: CVE-2020-16846

Severity: critical

Author: dwisiswant0

Tags: cve2020,cve,vulhub,saltstack,kev

Description

Section titled “Description”

SaltStack Salt through 3002 allows an unauthenticated user with network access to the Salt API to use shell injections to run code on the Salt-API using the SSH client.

YAML Source

Section titled “YAML Source”
id: CVE-2020-16846


info:
  name: SaltStack <=3002 - Shell Injection
  author: dwisiswant0
  severity: critical
  description: |
    SaltStack Salt through 3002 allows an unauthenticated user with network access to the Salt API to use shell injections to run code on the Salt-API using the SSH client.
  remediation: |
    Upgrade to a patched version of SaltStack (>=3003) to mitigate this vulnerability.
  reference:
    - https://saltproject.io/on-november-3-2020-saltstack-publicly-disclosed-three-new-cves/
    - https://mp.weixin.qq.com/s/R8qw_lWizGyeJS0jOcYXag
    - https://github.com/vulhub/vulhub/tree/master/saltstack/CVE-2020-16846
    - https://nvd.nist.gov/vuln/detail/CVE-2020-16846
    - http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00029.html
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2020-16846
    cwe-id: CWE-78
    epss-score: 0.97467
    epss-percentile: 0.99962
    cpe: cpe:2.3:a:saltstack:salt:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: saltstack
    product: salt
  tags: cve2020,cve,vulhub,saltstack,kev
variables:
  priv: "{{to_lower(rand_text_alpha(5))}}"
  roaster: "{{to_lower(rand_text_alpha(6))}}"


http:
  - method: POST
    path:
      - "{{BaseURL}}/run"


    body: "token=1337&client=ssh&tgt=*&fun=a&roster={{roaster}}&ssh_priv={{priv}}"


    headers:
      Content-Type: application/x-www-form-urlencoded # CherryPy will abort w/o define this header


    matchers-condition: and
    matchers:
      - type: dsl
        dsl:
          - regex("CherryPy\/([0-9.]+)", header) || regex("CherryPy ([0-9.]+)", body)


      - type: word
        part: body
        words:
          - "An unexpected error occurred"


      - type: word
        part: header
        words:
          - "application/json"


      - type: status
        status:
          - 500
# digest: 490a0046304402205bdb4c797f328c4914a9e09a15d8be520c04e35f8d053d755fbc41170e33f75302201aa24321fa882160ae44ac611f3266b6fa87417fea14a8c03f7e9a67a35e1964:922c64590222798bb761d5b6d8e72950

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/2020/CVE-2020-16846.yaml"

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