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https://github.com/yt-dlp/yt-dlp.git
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[core] Change how Cookie headers are handled
Cookies are now saved and loaded under `cookies` key in the info dict instead of `http_headers.Cookie`. Cookies passed in headers are auto-scoped to the input URLs with a warning. Ref: https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-v8mc-9377-rwjj Authored by: Grub4K
This commit is contained in:
Simon Sawicki
pukkandan
parent
f8b4bcc0a7
commit
3121512228
3 changed files with 139 additions and 4 deletions
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@ -1213,6 +1213,62 @@ def _real_extract(self, url):
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self.assertEqual(downloaded['extractor'], 'Video')
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self.assertEqual(downloaded['extractor_key'], 'Video')
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def test_header_cookies(self):
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from http.cookiejar import Cookie
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ydl = FakeYDL()
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ydl.report_warning = lambda *_, **__: None
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def cookie(name, value, version=None, domain='', path='', secure=False, expires=None):
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return Cookie(
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version or 0, name, value, None, False,
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domain, bool(domain), bool(domain), path, bool(path),
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secure, expires, False, None, None, rest={})
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_test_url = 'https://yt.dlp/test'
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def test(encoded_cookies, cookies, headers=False, round_trip=None, error=None):
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def _test():
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ydl.cookiejar.clear()
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ydl._load_cookies(encoded_cookies, from_headers=headers)
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if headers:
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ydl._apply_header_cookies(_test_url)
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data = {'url': _test_url}
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ydl._calc_headers(data)
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self.assertCountEqual(
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map(vars, ydl.cookiejar), map(vars, cookies),
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'Extracted cookiejar.Cookie is not the same')
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if not headers:
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self.assertEqual(
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data.get('cookies'), round_trip or encoded_cookies,
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'Cookie is not the same as round trip')
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ydl.__dict__['_YoutubeDL__header_cookies'] = []
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with self.subTest(msg=encoded_cookies):
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if not error:
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_test()
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return
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with self.assertRaisesRegex(Exception, error):
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_test()
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test('test=value; Domain=.yt.dlp', [cookie('test', 'value', domain='.yt.dlp')])
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test('test=value', [cookie('test', 'value')], error='Unscoped cookies are not allowed')
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test('cookie1=value1; Domain=.yt.dlp; Path=/test; cookie2=value2; Domain=.yt.dlp; Path=/', [
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cookie('cookie1', 'value1', domain='.yt.dlp', path='/test'),
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cookie('cookie2', 'value2', domain='.yt.dlp', path='/')])
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test('test=value; Domain=.yt.dlp; Path=/test; Secure; Expires=9999999999', [
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cookie('test', 'value', domain='.yt.dlp', path='/test', secure=True, expires=9999999999)])
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test('test="value; "; path=/test; domain=.yt.dlp', [
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cookie('test', 'value; ', domain='.yt.dlp', path='/test')],
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round_trip='test="value\\073 "; Domain=.yt.dlp; Path=/test')
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test('name=; Domain=.yt.dlp', [cookie('name', '', domain='.yt.dlp')],
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round_trip='name=""; Domain=.yt.dlp')
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test('test=value', [cookie('test', 'value', domain='.yt.dlp')], headers=True)
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test('cookie1=value; Domain=.yt.dlp; cookie2=value', [], headers=True, error='Invalid syntax')
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ydl.deprecated_feature = ydl.report_error
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test('test=value', [], headers=True, error='Passing cookies as a header is a potential security risk')
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if __name__ == '__main__':
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unittest.main()
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@ -1,9 +1,11 @@
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import collections
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import contextlib
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import copy
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import datetime
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import errno
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import fileinput
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import functools
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import http.cookiejar
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import io
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import itertools
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import json
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@ -25,7 +27,7 @@
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from .cache import Cache
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from .compat import urllib # isort: split
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from .compat import compat_os_name, compat_shlex_quote
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from .cookies import load_cookies
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from .cookies import LenientSimpleCookie, load_cookies
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from .downloader import FFmpegFD, get_suitable_downloader, shorten_protocol_name
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from .downloader.rtmp import rtmpdump_version
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from .extractor import gen_extractor_classes, get_info_extractor
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@ -673,6 +675,9 @@ def process_color_policy(stream):
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if auto_init and auto_init != 'no_verbose_header':
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self.print_debug_header()
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self.__header_cookies = []
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self._load_cookies(traverse_obj(self.params.get('http_headers'), 'cookie', casesense=False)) # compat
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def check_deprecated(param, option, suggestion):
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if self.params.get(param) is not None:
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self.report_warning(f'{option} is deprecated. Use {suggestion} instead')
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@ -1625,8 +1630,60 @@ def progress(msg):
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self.to_screen('')
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raise
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def _load_cookies(self, data, *, from_headers=True):
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"""Loads cookies from a `Cookie` header
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This tries to work around the security vulnerability of passing cookies to every domain.
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See: https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-v8mc-9377-rwjj
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The unscoped cookies are saved for later to be stored in the jar with a limited scope.
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@param data The Cookie header as string to load the cookies from
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@param from_headers If `False`, allows Set-Cookie syntax in the cookie string (at least a domain will be required)
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"""
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for cookie in LenientSimpleCookie(data).values():
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if from_headers and any(cookie.values()):
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raise ValueError('Invalid syntax in Cookie Header')
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domain = cookie.get('domain') or ''
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expiry = cookie.get('expires')
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if expiry == '': # 0 is valid
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expiry = None
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prepared_cookie = http.cookiejar.Cookie(
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cookie.get('version') or 0, cookie.key, cookie.value, None, False,
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domain, True, True, cookie.get('path') or '', bool(cookie.get('path')),
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cookie.get('secure') or False, expiry, False, None, None, {})
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if domain:
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self.cookiejar.set_cookie(prepared_cookie)
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elif from_headers:
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self.deprecated_feature(
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'Passing cookies as a header is a potential security risk; '
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'they will be scoped to the domain of the downloaded urls. '
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'Please consider loading cookies from a file or browser instead.')
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self.__header_cookies.append(prepared_cookie)
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else:
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self.report_error('Unscoped cookies are not allowed; please specify some sort of scoping',
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tb=False, is_error=False)
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def _apply_header_cookies(self, url):
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"""Applies stray header cookies to the provided url
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This loads header cookies and scopes them to the domain provided in `url`.
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While this is not ideal, it helps reduce the risk of them being sent
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to an unintended destination while mostly maintaining compatibility.
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"""
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parsed = urllib.parse.urlparse(url)
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if not parsed.hostname:
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return
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for cookie in map(copy.copy, self.__header_cookies):
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cookie.domain = f'.{parsed.hostname}'
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self.cookiejar.set_cookie(cookie)
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@_handle_extraction_exceptions
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def __extract_info(self, url, ie, download, extra_info, process):
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self._apply_header_cookies(url)
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try:
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ie_result = ie.extract(url)
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except UserNotLive as e:
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@ -2414,9 +2471,24 @@ def _calc_headers(self, info_dict):
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if 'Youtubedl-No-Compression' in res: # deprecated
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res.pop('Youtubedl-No-Compression', None)
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res['Accept-Encoding'] = 'identity'
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cookies = self.cookiejar.get_cookie_header(info_dict['url'])
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cookies = self.cookiejar.get_cookies_for_url(info_dict['url'])
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if cookies:
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res['Cookie'] = cookies
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encoder = LenientSimpleCookie()
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values = []
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for cookie in cookies:
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_, value = encoder.value_encode(cookie.value)
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values.append(f'{cookie.name}={value}')
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if cookie.domain:
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values.append(f'Domain={cookie.domain}')
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if cookie.path:
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values.append(f'Path={cookie.path}')
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if cookie.secure:
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values.append('Secure')
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if cookie.expires:
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values.append(f'Expires={cookie.expires}')
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if cookie.version:
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values.append(f'Version={cookie.version}')
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info_dict['cookies'] = '; '.join(values)
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if 'X-Forwarded-For' not in res:
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x_forwarded_for_ip = info_dict.get('__x_forwarded_for_ip')
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@ -3423,6 +3495,8 @@ def download_with_info_file(self, info_filename):
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infos = [self.sanitize_info(info, self.params.get('clean_infojson', True))
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for info in variadic(json.loads('\n'.join(f)))]
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for info in infos:
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self._load_cookies(info.get('cookies'), from_headers=False)
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self._load_cookies(traverse_obj(info.get('http_headers'), 'Cookie', casesense=False)) # compat
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try:
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self.__download_wrapper(self.process_ie_result)(info, download=True)
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except (DownloadError, EntryNotInPlaylist, ReExtractInfo) as e:
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@ -32,6 +32,7 @@
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timetuple_from_msec,
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try_call,
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)
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from ..utils.traversal import traverse_obj
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class FileDownloader:
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@ -419,7 +420,6 @@ def download(self, filename, info_dict, subtitle=False):
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"""Download to a filename using the info from info_dict
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Return True on success and False otherwise
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"""
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nooverwrites_and_exists = (
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not self.params.get('overwrites', True)
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and os.path.exists(encodeFilename(filename))
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@ -453,6 +453,11 @@ def download(self, filename, info_dict, subtitle=False):
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self.to_screen(f'[download] Sleeping {sleep_interval:.2f} seconds ...')
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time.sleep(sleep_interval)
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# Filter the `Cookie` header from the info_dict to prevent leaks.
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# See: https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-v8mc-9377-rwjj
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info_dict['http_headers'] = dict(traverse_obj(info_dict, (
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'http_headers', {dict.items}, lambda _, pair: pair[0].lower() != 'cookie'))) or None
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ret = self.real_download(filename, info_dict)
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self._finish_multiline_status()
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return ret, True
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