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https://issues.apache.org/jira/browse/OPENNLP-1899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Richard Zowalla closed OPENNLP-1899.
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Resolution: Fixed
> Harden SymSpell model deserialization against oversized count fields
> --------------------------------------------------------------------
>
> Key: OPENNLP-1899
> URL: https://issues.apache.org/jira/browse/OPENNLP-1899
> Project: OpenNLP
> Issue Type: Improvement
> Affects Versions: 3.0.0-M5
> Reporter: Richard Zowalla
> Assignee: Richard Zowalla
> Priority: Major
> Fix For: 3.0.0-M6
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> SymSpellModelSerializer.create() reads unigramCount and bigramCount as 32-bit
> ints
> from the binary model stream and passes them straight to
> LinkedHashMap.newLinkedHashMap(...), guarded only against negative values.
> A crafted .bin model declaring Integer.MAX_VALUE pre-sizes the map to 2^30
> entries;
> the first put() then allocates a 4-8 GB backing array and the JVM dies with
> OutOfMemoryError.
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