mirror of https://github.com/google/oss-fuzz.git
55 lines
1.4 KiB
Python
55 lines
1.4 KiB
Python
#!/usr/bin/python3
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# Copyright 2022 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Fuzzer triggering insecure yaml serialization."""
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import sys
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import yaml
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import atheris
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import pysecsan
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def serialize_with_tainted_data(param, magicval):
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"""Pass data to insecure yaml functions."""
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if magicval == 1337:
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try:
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yaml.load(param, yaml.Loader)
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except yaml.YAMLError:
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pass
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elif magicval == 1338:
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try:
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yaml.load('FROMFUZZ', yaml.Loader)
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except yaml.YAMLError:
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pass
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def test_one_input(data):
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"""Fuzzer entrypoint."""
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fdp = atheris.FuzzedDataProvider(data)
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serialize_with_tainted_data(fdp.ConsumeUnicodeNoSurrogates(32),
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fdp.ConsumeIntInRange(500, 1500))
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def main():
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"""Set up and start fuzzing."""
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pysecsan.add_hooks()
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atheris.instrument_all()
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atheris.Setup(sys.argv, test_one_input, enable_python_coverage=True)
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atheris.Fuzz()
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if __name__ == '__main__':
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main()
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