Openssh shipped with RHEL6 sends wrong SSH_MSG_DISCONNECT
Environment
- Red Hat Enterprise Linux(RHEL) 6
- openssh-5.3p1-104.el6_6.1
Issue
- ssh connections are not terminated correctly, in case the client disconnects.
- The ssh-server does keep already terminated ssh-connections, until the socket times out.
sshdchild processes stay running, even if the client side has disconnected correctly.
Resolution
- This issue has been fixed with Errata RHBA-2015:1610-1
- This is fixed with
openssh-5.3p1-112.el6_7and later versions.
Root Cause
- Current implementation of
openssh-clientsshipped withRHEL6does not adhere toRFC 4253, as a language tag is not sent in some cases for theSSH_MSG_DISCONNECTmessage
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