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https://issues.apache.org/jira/browse/SSHD-699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15496470#comment-15496470
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Johan Östling commented on SSHD-699:
------------------------------------
Thanks for the clarification of the specs! I noticed this in conjunction with
sshj sending these kind of messages; but from what you are saying I should
report this as a bug with them instead.
> Server receiving 0-length SSH_MSG_IGNORE causes Buffer Underflow exception
> --------------------------------------------------------------------------
>
> Key: SSHD-699
> URL: https://issues.apache.org/jira/browse/SSHD-699
> Project: MINA SSHD
> Issue Type: Improvement
> Affects Versions: 1.2.0
> Reporter: Johan Östling
> Assignee: Goldstein Lyor
> Priority: Minor
>
> Trying to establish the length of a message with only a header byte will
> cause a buffer underflow exception. I noticed it on SSH_MSG_IGNORE, but it is
> probably general to all messages.
> Reproducible with unit test:
> {code:title=AbstractSessionTest.java|borderStyle=solid}
> @Test
> public void testZeroLengthIgnoreMessage() throws Exception {
> Buffer msg = session.createBuffer(SshConstants.SSH_MSG_IGNORE,
> Byte.SIZE);
> session.handleIgnore(msg);
> }
> {code}
> This is a regression since 0.14.0, which did not have this problem.
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