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https://issues.apache.org/jira/browse/OAK-3105?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14628090#comment-14628090
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Francesco Mari commented on OAK-3105:
-------------------------------------
Thanks [~mduerig] for applying!
> SegmentWriter doesn't properly check the length of external blob IDs
> --------------------------------------------------------------------
>
> Key: OAK-3105
> URL: https://issues.apache.org/jira/browse/OAK-3105
> Project: Jackrabbit Oak
> Issue Type: Bug
> Affects Versions: 1.2.2, 1.3.2, 1.0.17
> Reporter: Francesco Mari
> Assignee: Michael Dürig
> Priority: Critical
> Fix For: 1.2.3, 1.3.3, 1.0.18
>
> Attachments: OAK-3105-01.patch
>
>
> To store the length field of an external binary ID, the following encoding is
> used:
> {noformat}
> 1110 + 4bit + 8bit
> {noformat}
> which allows to store numbers between 0 and 2{^}12^ - 1.
> The current implementation of {{SegmentWriter}} allows the length of binary
> IDs to range between 0 and 2{^}13^ - 1, writing incorrect data when the
> length of the binary ID ranges from 2{^}12^ to 2{^}13^ - 1.
> When reading this incorrect data back, an {{IllegalStateException}} is thrown
> complaining that the first byte of the length fields has an unexpected value
> record type. See OAK-1842 for an example.
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