Add a max limit to header length for parsing.
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Key: MIME4J-57
URL: https://issues.apache.org/jira/browse/MIME4J-57
Project: Mime4j
Issue Type: Bug
Affects Versions: 0.3
Reporter: Stefano Bagnara
Fix For: 0.4, 0.5
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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