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Posted to jira@arrow.apache.org by "Antoine Pitrou (Jira)" <ji...@apache.org> on 2021/02/08 18:47:00 UTC

[jira] [Created] (ARROW-11559) [C++] Improve flatbuffers verification limits

Antoine Pitrou created ARROW-11559:
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             Summary: [C++] Improve flatbuffers verification limits
                 Key: ARROW-11559
                 URL: https://issues.apache.org/jira/browse/ARROW-11559
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Antoine Pitrou
            Assignee: Antoine Pitrou


See discussion in [https://github.com/apache/arrow/pull/9349#issuecomment-775295349] :

Flatbuffers is able to encode a virtually unbounded of schema fields in a small buffer size. Verifying that many fields with the Flatbuffers verifier seems to result in potentially unlimited verification times, which is a denial of service risk.

The way to mitigate this risk is to pass an appropriate max_tables and/or max_depth limit to the Flatbuffers verifier.



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