CVE-2023-42442 PoC — JumpServer session replays download without authentication

Source

https://github.com/C1ph3rX13/CVE-2023-42442

Associated Vulnerability

Title:JumpServer session replays download without authentication (CVE-2023-42442)
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`).

Description

CVE-2023-42442

Readme

# CVE-2023-42442
CVE-2023-42442 JumpServer Session 录像任意下载漏洞

## 漏洞说明

CVE-2023-42442是一个组合洞，包含Jumpserver中的两个Bug

1. API未授权访问导致泄露session信息

2. 目录权限绕过导致录像文件被下载

## USAGE

### Python Version

```python
python CVE-2023-42442.py -h


     ██████╗██╗   ██╗███████╗    ██████╗  ██████╗ ██████╗ ██████╗       ██╗  ██╗██████╗ ██╗  ██╗██╗  ██╗██████╗
    ██╔════╝██║   ██║██╔════╝    ╚════██╗██╔═████╗╚════██╗╚════██╗      ██║  ██║╚════██╗██║  ██║██║  ██║╚════██╗
    ██║     ██║   ██║█████╗█████╗ █████╔╝██║██╔██║ █████╔╝ █████╔╝█████╗███████║ █████╔╝███████║███████║ █████╔╝
    ██║     ╚██╗ ██╔╝██╔══╝╚════╝██╔═══╝ ████╔╝██║██╔═══╝  ╚═══██╗╚════╝╚════██║██╔═══╝ ╚════██║╚════██║██╔═══╝
    ╚██████╗ ╚████╔╝ ███████╗    ███████╗╚██████╔╝███████╗██████╔╝           ██║███████╗     ██║     ██║███████╗
     ╚═════╝  ╚═══╝  ╚══════╝    ╚══════╝ ╚═════╝ ╚══════╝╚═════╝            ╚═╝╚══════╝     ╚═╝     ╚═╝╚══════╝

        @Auth: C1ph3rX13
        @Blog: https://c1ph3rx13.github.io
        @Note: 代码仅供学习使用，请勿用于其他用途


usage: CVE-2023-42442.py [-h] -t TARGET

CVE-2023-42442 by C1ph3rX13.

options:
  -h, --help            show this help message and exit
  -t TARGET, --target TARGET
                        target url
```

![image-1](https://raw.githubusercontent.com/C1ph3rX13/CVE-2023-42442/main/images/CVE-2023-42442.png)

### Go Version

Build

```powershell
# 源码编译，暂时只支持Windows
go mod init CVE-2023-42442
go mod tidy
go build -ldflags="-s -w" -trimpath -o CVE-2023-42442.exe .\CVE-2023-42442.go
```

Run

```powershell
.\CVE-2023-42442.exe -h


        ██████╗██╗   ██╗███████╗    ██████╗  ██████╗ ██████╗ ██████╗       ██╗  ██╗██████╗ ██╗  ██╗██╗  ██╗██████╗
        ██╔════╝██║   ██║██╔════╝    ╚════██╗██╔═████╗╚════██╗╚════██╗      ██║  ██║╚════██╗██║  ██║██║  ██║╚════██╗
        ██║     ██║   ██║█████╗█████╗ █████╔╝██║██╔██║ █████╔╝ █████╔╝█████╗███████║ █████╔╝███████║███████║ █████╔╝
        ██║     ╚██╗ ██╔╝██╔══╝╚════╝██╔═══╝ ████╔╝██║██╔═══╝  ╚═══██╗╚════╝╚════██║██╔═══╝ ╚════██║╚════██║██╔═══╝
        ╚██████╗ ╚████╔╝ ███████╗    ███████╗╚██████╔╝███████╗██████╔╝           ██║███████╗     ██║     ██║███████╗
        ╚═════╝  ╚═══╝  ╚══════╝    ╚══════╝ ╚═════╝ ╚══════╝╚═════╝            ╚═╝╚══════╝     ╚═╝     ╚═╝╚══════╝

        @Auth: C1ph3rX13
        @Blog: https://c1ph3rx13.github.io
        @Note: 代码仅供学习使用，请勿用于其他用途

Usage of CVE-2023-42442.exe:
  -proxy string
        Proxy Url: http/https://IP:Port
  -t string
        Target Url
```

![img](https://raw.githubusercontent.com/C1ph3rX13/CVE-2023-42442/main/images/Go-CVE-2023-42442.png)
### 更新日志

+ 2023-10-31 优化 Go Version，减少代码量

### 问题

+ `httpx`会自动化规范输入`url`的格式，即使是使用`Writing custom transports`
+ httpx wiki：https://www.python-httpx.org/advanced/#writing-custom-transports

+ `requests`则不会

###  参考

部分代码参考以下项目：

https://github.com/tarimoe/blackjump

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File Snapshot


 [4.0K]  /data/pocs/a062abf3e2c161e40ad1ed3f37d06123fb091038
├── [5.7M]  CVE-2023-42442.exe
├── [ 11K]  CVE-2023-42442.go
├── [8.9K]  CVE-2023-42442.py
├── [4.0K]  images
│   ├── [ 52K]  CVE-2023-42442.png
│   └── [ 56K]  Go-CVE-2023-42442.png
├── [1.0K]  LICENSE
└── [5.6K]  README.md

1 directory, 7 files

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