[jira] Resolved: (MIME4J-57) Add a max limit to header length for parsing.

["Oleg Kalnichevski (JIRA)" <se...@james.apache.org>]

     [ https://issues.apache.org/jira/browse/MIME4J-57?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Oleg Kalnichevski resolved MIME4J-57.
-------------------------------------

    Resolution: Fixed

I am closing this issue as resolved and am proceeding with preparing the release. If find anything wrong with the latest changes, just go ahead and reopen the issue.

Oleg

> Add a max limit to header length for parsing.
> ---------------------------------------------
>
>                 Key: MIME4J-57
>                 URL: https://issues.apache.org/jira/browse/MIME4J-57
>             Project: JAMES Mime4j
>          Issue Type: Bug
>    Affects Versions: 0.3
>            Reporter: Stefano Bagnara
>            Priority: Critical
>             Fix For: 0.5
>
>         Attachments: maxlinelen.patch
>
>
> MIME4J-55 showed issues with very long multipart mime boundary.
> It has been fixed by having the buffer size depending on the boundary length. This create possible issues (OOM/DoS) with malicious messages.
> It would be good to define a maximum length for an header.
> Somewhere in mime rfc or smtp rfc there is a maximum of 998+CRLF ascii bytes per line, of course we may want to support longer headers, but not very long ones.

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