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https://issues.apache.org/jira/browse/AVRO-4284?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismaël Mejía reassigned AVRO-4284:
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Assignee: Ismaël Mejía
> [c] Enforce a maximum decompressed block size
> ---------------------------------------------
>
> Key: AVRO-4284
> URL: https://issues.apache.org/jira/browse/AVRO-4284
> Project: Apache Avro
> Issue Type: Sub-task
> Components: c
> Affects Versions: 1.11.5, 1.12.1
> Reporter: Ismaël Mejía
> Assignee: Ismaël Mejía
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.12.2
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> When reading a data file, {{lang/c/src/codec.c}} decompresses each block
> without bounding the output size: {{decode_deflate}} doubles the output
> buffer until the stream ends, {{decode_snappy}} allocates the
> attacker-declared uncompressed length, and {{decode_lzma}} doubles the buffer
> until done. The block is read in {{lang/c/src/datafile.c}}.
> Enforce a configurable maximum decompressed size in each codec, defaulting to
> a runtime-safe value (overridable, e.g. via the AVRO_MAX_DECOMPRESS_LENGTH
> environment variable), and fail decoding with a clear error when a block
> would exceed it. Add a test with a high-ratio block.
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