CVE-2021-43798 PoC — Grafana path traversal

Source

https://github.com/zer0yu/CVE-2021-43798

Associated Vulnerability

Title:Grafana path traversal (CVE-2021-43798)
Description:Grafana is an open-source platform for monitoring and observability. Grafana versions 8.0.0-beta1 through 8.3.0 (except for patched versions) iss vulnerable to directory traversal, allowing access to local files. The vulnerable URL path is: `<grafana_host_url>/public/plugins//`, where is the plugin ID for any installed plugin. At no time has Grafana Cloud been vulnerable. Users are advised to upgrade to patched versions 8.0.7, 8.1.8, 8.2.7, or 8.3.1. The GitHub Security Advisory contains more information about vulnerable URL paths, mitigation, and the disclosure timeline.

Description

Grafana Arbitrary File Reading Vulnerability

Readme

# GrafanaArbitraryFileRead

## Usage

### 1. show info

```bash
❯ go run main.go -s                                               
[INF] VulnInfo:
{
  "Name": "Grafana Arbitrary File Read",
  "VulID": "nil",
  "Version": "1.0",
  "Author": "z3",
  "VulDate": "2021-12-07",
  "References": [
    "https://nosec.org/home/detail/4914.html"
  ],
  "AppName": "Grafana",
  "AppPowerLink": "https://grafana.com/",
  "AppVersion": "Grafana Version 8.*",
  "VulType": "Arbitrary File Read",
  "Description": "An unauthorized arbitrary file reading vulnerability exists in Grafana, which can be exploited by an attacker to read arbitrary files on the host computer without authentication.",
  "Category": "REMOTE",
  "Dork": {
    "Fofa": "app=\"Grafana\"",
    "Quake": "",
    "Zoomeye": "",
    "Shodan": ""
  }
}%     
```

### 2. verify

```bash
echo vulfocus.fofa.so:55628 | go run main.go -v -t 20
http://vulfocus.fofa.so:55628
```

### 3. exploit

```bash
echo http://vulfocus.fofa.so:51766 | go run main.go -m exploit -v
```
Realization of the utilization idea in reference 1. To extract more information please modify the regular in the getAccesskey function.


## Reference

1. [grafana最新任意文件读取分析以及衍生问题解释](https://mp.weixin.qq.com/s/dqJ3F_fStlj78S0qhQ3Ggw)
2. [Grafana Unauthorized arbitrary file reading vulnerability](https://github.com/jas502n/Grafana-VulnTips)

## Disclaimer

This procedure is for security self-inspection only, please consciously comply with local laws.

File Snapshot


 [4.0K]  /data/pocs/9012767beec75dd49bdc72d834029e390b89790e
├── [ 501]  go.mod
├── [4.3K]  go.sum
├── [ 11K]  main.go
└── [1.5K]  README.md

0 directories, 4 files

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