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Posted to dev@avro.apache.org by "Michael Cooper (JIRA)" <ji...@apache.org> on 2013/07/03 14:39:20 UTC

[jira] [Commented] (AVRO-1237) Avro-C segfaults when union discriminant out of bounds

    [ https://issues.apache.org/jira/browse/AVRO-1237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13698900#comment-13698900 ] 

Michael Cooper commented on AVRO-1237:
--------------------------------------

Hey, have you had a chance to look at doing the bounds check in the reader yet?
                
> Avro-C segfaults when union discriminant out of bounds
> ------------------------------------------------------
>
>                 Key: AVRO-1237
>                 URL: https://issues.apache.org/jira/browse/AVRO-1237
>             Project: Avro
>          Issue Type: Bug
>          Components: c
>         Environment: Avro-C 1.7.2
> Ubuntu 12.04 x86_64
>            Reporter: Michael Cooper
>         Attachments: 0001-Check-union-discriminant-bounds-in-both-directions.patch, 0001-Test-case-for-AVRO-1237.patch, avro-1237-bad-union-discriminant.avro, avro-1237-good.avro
>
>
> libavro will segfault when decrypting a specially crafted (or corrupted) avro file when the discriminant is out of bounds.
> There is already a check for < 0, but there is no upper bounds check.
> I have attached a patch that checks the bounds.

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