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Merge remote-tracking branch 'upstream/master' into bugfix/remotes-pathy-fluid
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commit
6e62d7bec6
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@ -11,6 +11,7 @@ from .._util import ensure_pathy, make_tempdir, _file_exists
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from ...util import get_minor_version, ENV_VARS, check_bool_env_var
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from ...git_info import GIT_VERSION
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from ... import about
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from ...errors import Errors
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if TYPE_CHECKING:
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from pathy import FluidPath # noqa: F401
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@ -83,7 +84,23 @@ class RemoteStorage:
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with tarfile.open(tar_loc, mode=mode_string) as tar_file:
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# This requires that the path is added correctly, relative
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# to root. This is how we set things up in push()
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tar_file.extractall(self.root)
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# Disallow paths outside the current directory for the tar
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# file (CVE-2007-4559, directory traversal vulnerability)
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def is_within_directory(directory, target):
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abs_directory = os.path.abspath(directory)
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abs_target = os.path.abspath(target)
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prefix = os.path.commonprefix([abs_directory, abs_target])
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return prefix == abs_directory
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def safe_extract(tar, path):
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for member in tar.getmembers():
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member_path = os.path.join(path, member.name)
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if not is_within_directory(path, member_path):
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raise ValueError(Errors.E852)
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tar.extractall(path)
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safe_extract(tar_file, self.root)
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return url
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def find(
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@ -544,6 +544,8 @@ class Errors(metaclass=ErrorsWithCodes):
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"during training, make sure to include it in 'annotating components'")
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# New errors added in v3.x
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E852 = ("The tar file pulled from the remote attempted an unsafe path "
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"traversal.")
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E853 = ("Unsupported component factory name '{name}'. The character '.' is "
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"not permitted in factory names.")
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E854 = ("Unable to set doc.ents. Check that the 'ents_filter' does not "
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