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Posted to dev@mina.apache.org by "Johan Östling (JIRA)" <ji...@apache.org> on 2016/09/16 13:20:20 UTC
[jira] [Created] (SSHD-699) Server receiving 0-length
SSH_MSG_IGNORE causes Buffer Underflow exception
Johan Östling created SSHD-699:
----------------------------------
Summary: 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: Bug
Affects Versions: 1.2.0
Reporter: Johan Östling
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: (in AbstractSessionTest)
```
@Test
public void testZeroLengthIgnoreMessage() throws Exception {
Buffer msg = session.createBuffer(SshConstants.SSH_MSG_IGNORE, Byte.SIZE);
session.handleIgnore(msg);
}
```
This is a regression since 0.14.0, which did not have this problem.
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