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[core] Disallow unsafe extensions (CVE-2024-38519)

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Ref: https://github.com/yt-dlp/yt-dlp/security/advisories/GHSA-79w7-vh3h-8g4j

Authored by: Grub4K
This commit is contained in:
Simon Sawicki
2024-07-02 00:52:50 +02:00
parent 6aaf96a3d6
commit 5ce582448e
7 changed files with 179 additions and 12 deletions
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31
test/test_utils.py
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@@ -130,6 +130,7 @@ from yt_dlp.utils import (
xpath_text,
xpath_with_ns,
)
from yt_dlp.utils._utils import _UnsafeExtensionError
from yt_dlp.utils.networking import (
HTTPHeaderDict,
escape_rfc3986,
@@ -281,6 +282,13 @@ class TestUtil(unittest.TestCase):
finally:
os.environ['HOME'] = old_home or ''
_uncommon_extensions = [
('exe', 'abc.exe.ext'),
('de', 'abc.de.ext'),
('../.mp4', None),
('..\\.mp4', None),
]
def test_prepend_extension(self):
self.assertEqual(prepend_extension('abc.ext', 'temp'), 'abc.temp.ext')
self.assertEqual(prepend_extension('abc.ext', 'temp', 'ext'), 'abc.temp.ext')
@@ -289,6 +297,19 @@ class TestUtil(unittest.TestCase):
self.assertEqual(prepend_extension('.abc', 'temp'), '.abc.temp')
self.assertEqual(prepend_extension('.abc.ext', 'temp'), '.abc.temp.ext')
# Test uncommon extensions
self.assertEqual(prepend_extension('abc.ext', 'bin'), 'abc.bin.ext')
for ext, result in self._uncommon_extensions:
with self.assertRaises(_UnsafeExtensionError):
prepend_extension('abc', ext)
if result:
self.assertEqual(prepend_extension('abc.ext', ext, 'ext'), result)
else:
with self.assertRaises(_UnsafeExtensionError):
prepend_extension('abc.ext', ext, 'ext')
with self.assertRaises(_UnsafeExtensionError):
prepend_extension('abc.unexpected_ext', ext, 'ext')
def test_replace_extension(self):
self.assertEqual(replace_extension('abc.ext', 'temp'), 'abc.temp')
self.assertEqual(replace_extension('abc.ext', 'temp', 'ext'), 'abc.temp')
@@ -297,6 +318,16 @@ class TestUtil(unittest.TestCase):
self.assertEqual(replace_extension('.abc', 'temp'), '.abc.temp')
self.assertEqual(replace_extension('.abc.ext', 'temp'), '.abc.temp')
# Test uncommon extensions
self.assertEqual(replace_extension('abc.ext', 'bin'), 'abc.unknown_video')
for ext, _ in self._uncommon_extensions:
with self.assertRaises(_UnsafeExtensionError):
replace_extension('abc', ext)
with self.assertRaises(_UnsafeExtensionError):
replace_extension('abc.ext', ext, 'ext')
with self.assertRaises(_UnsafeExtensionError):
replace_extension('abc.unexpected_ext', ext, 'ext')
def test_subtitles_filename(self):
self.assertEqual(subtitles_filename('abc.ext', 'en', 'vtt'), 'abc.en.vtt')
self.assertEqual(subtitles_filename('abc.ext', 'en', 'vtt', 'ext'), 'abc.en.vtt')