Fix fuzzer metadata injection via unicode line separator abuse - #5429
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JM00NJ wants to merge 2 commits into
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Fix fuzzer metadata injection via unicode line separator abuse#5429JM00NJ wants to merge 2 commits into
JM00NJ wants to merge 2 commits into
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Change errors='ignore' to errors='replace' to prevent invalid UTF-8 bytes from being silently dropped, which could allow metadata key manipulation in get_fuzzer_metadata_from_output(). Fixes google#5428
Sanitize fuzzer output before splitlines() to prevent CR, NEL (U+0085), U+2028, and U+2029 from injecting additional metadata keys. Fixes google#5428
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Fixes #5428
Two fixes for the metadata injection vulnerability:
utils.py: Changeerrors='ignore'toerrors='replace'to prevent silent dropping of invalid UTF-8 bytes that could be used to manipulate metadata keys.fuzz_task.py: Sanitize fuzzer output beforesplitlines()to prevent CR (\r), NEL (\x85), U+2028, and U+2029 from injecting additional metadata lines.