[jira] [Resolved] (SSHD-699) Server receiving 0-length SSH_MSG_IGNORE causes Buffer Underflow exception

["Goldstein Lyor (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SSHD-699?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Goldstein Lyor resolved SSHD-699.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 1.3.0

> 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
>             Fix For: 1.3.0
>
>
> 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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