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Posted to issues@commons.apache.org by "Stefan Bodewig (JIRA)" <ji...@apache.org> on 2018/04/01 10:08:00 UTC

[jira] [Commented] (COMPRESS-445) Zip Bomb Detection

    [ https://issues.apache.org/jira/browse/COMPRESS-445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16421620#comment-16421620 ] 

Stefan Bodewig commented on COMPRESS-445:
-----------------------------------------

Of course an attacker may be able to manipulate the uncompressed size, so relying on it is not a good idea.

> Zip Bomb Detection
> ------------------
>
>                 Key: COMPRESS-445
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-445
>             Project: Commons Compress
>          Issue Type: Improvement
>          Components: Archivers
>            Reporter: PJ Fanning
>            Priority: Major
>
> It would be a nice feature if ZipFile had support for detecting Zip Bombs.
> Apache Poi has an implementation based on the java util ZipFile but this relies on Reflection and changes in Java 10 mean this code will not work in that version.
> [https://github.com/apache/poi/blob/trunk/src/ooxml/java/org/apache/poi/openxml4j/util/ZipSecureFile.java]
> One option would be to add equivalent change support in commons-compress and for Poi to use the commons version.



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