Detected path traversal attempt in '%s'
w_relative_path: # Use PurePosixPath() because this branch is checked only in # FileField.generate_filename() where all file paths are expected to be # Unix style (with forward slashes). path = pathlib.PurePosixPath(name) if path.is_absolute() or '..' in path.parts: raise SuspiciousFileOperation( "Detected path traversal attempt in '%s'" % name ) elif name != os.path.basename(name): raise SuspiciousFileOperation("File name '%s' includes path elements" % name) return name class FileP
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Ways to fix
from django.db.models import FileField from django.core.files.storage import FileSystemStorage stor = FileSystemStorage() f = FileField(storage=stor) file_name = 'tmp/../traverse/path' # Suspicious directory path is used as the file name f.generate_filename(None, file_name)
from django.db.models import FileField from django.core.files.storage import FileSystemStorage stor = FileSystemStorage() f = FileField(storage=stor) file_name = 'tmp/path/file.txt' # File name with full path is passed f.generate_filename(None, file_name)
If we try to pass the directory path instead of the filename to the generate_filename method of the FileField model, the Suspicious file operation exception is raised with the error message "Detected Path traversal attempt in ..,". It can be fixed by simply passing the file name instead of the directory path.