Advisory details:
github_osv / GHSA-3f7w-p8vr-4v5f
| Advisory ID | github_osv/GHSA-3f7w-p8vr-4v5f |
| Aliases |
CVE-2024-32880
|
| Summary | pyLoad allows upload to arbitrary folder lead to RCE ### Summary An authenticated user can change the download folder and upload a crafted template to the specified folder lead to remote code execution ### Details example version: 0.5 file:src/pyload/webui/app/blueprints/app_blueprint.py ```python @bp.route("/render/<path:filename>", endpoint="render") def render(filename): mimetype = mimetypes.guess_type(filename)[0] or "text/html" data = render_template(filename) return flask.Response(data, mimetype=mimetype) ``` So, if we can control file in the path "pyload/webui/app/templates" in latest version and path in "module/web/media/js"(the difference is the older version0.4.20 only renders file with extension name ".js"), the render_template func will works like SSTI(server-side template injection) when render the evil file we control. in /settings page and the choose option general/general, where we can change the download folder.  Also, we can find the pyLoad install folder in /info page  So, we can change the value of Download folder to the template path. Then through /json/add_package we can upload a crafted template file to RCE. ```python @bp.route("/json/add_package", methods=["POST"], endpoint="add_package") # @apiver_check @login_required("ADD") def add_package(): api = flask.current_app.config["PYLOAD_API"] package_name = flask.request.form.get("add_name", "New Package").strip() queue = int(flask.request.form["add_dest"]) links = [l.strip() for l in flask.request.form["add_links"].splitlines()] pw = flask.request.form.get("add_password", "").strip("\n\r") try: file = flask.request.files["add_file"] if file.filename: if not package_name or package_name == "New Package": package_name = file.filename file_path = os.path.join( api.get_config_value("general", "storage_folder"), "tmp_" + file.filename ) file.save(file_path) links.insert(0, file_path) except Exception: pass urls = [url for url in links if url.strip()] pack = api.add_package(package_name, urls, queue) if pw: data = {"password": pw} api.set_package_data(pack, data) return jsonify(True) ``` ### PoC First login into the admin page, then visit the info page to get the path of pyload installation folder. Second, change the download folder to PYLOAD_INSTALL_DIR/ webui/app/templates/ Third, upload crafted template file through /json/add_package through parameter add_file the content of crafted template file and its filename is "341.html": ``` {{x.__init__.__globals__['__builtins__']['eval']("__import__('os').popen('whoami').read()")}} ```  Last, visit http://TARGET/render/tmp_341.html to trigger the RCE   ### Impact It is a RCE vulnerability and I think it affects all versions. In earlier version 0.4.20, the trigger difference is the pyload installation folder path difference and the upload file must with extension ".js" . The render js code in version 0.4.20: ```python @route("/media/js/<path:re:.+\.js>") def js_dynamic(path): response.headers['Expires'] = time.strftime("%a, %d %b %Y %H:%M:%S GMT", time.gmtime(time.time() + 60 * 60 * 24 * 2)) response.headers['Cache-control'] = "public" response.headers['Content-Type'] = "text/javascript; charset=UTF-8" try: # static files are not rendered if "static" not in path and "mootools" not in path: t = env.get_template("js/%s" % path) return t.render() else: return static_file(path, root=join(PROJECT_DIR, "media", "js")) except: return HTTPError(404, "Not Found") ``` |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 8.2 |
| Risk | 4.1 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 9.1 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/04/GHSA-3f7w-p8vr-4v5f/GHSA-3f7w-p8vr-4v5f.json |
| generic_textual | CRITICAL |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/pyload/pyload | ||
| CVE-2024-32880 | https://nvd.nist.gov/vuln/detail/CVE-2024-32880 | |
| GHSA-3f7w-p8vr-4v5f | https://github.com/pyload/pyload/security/advisories/GHSA-3f7w-p8vr-4v5f |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2024-04-26T18:47:38Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2024/32xxx/CVE-2024-32880.json
Source Advisory: vulnrichment/CVE-2024-32880
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'total'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]