[Bug 2941] Transferring large files yields error: ssh_dispatch_run_fatal: message authentication code incorrect

bugzilla-daemon at bugzilla.mindrot.org bugzilla-daemon at bugzilla.mindrot.org
Fri Dec 7 16:09:35 AEDT 2018


Darren Tucker <dtucker at dtucker.net> changed:

           What    |Removed                     |Added
         Resolution|---                         |DUPLICATE
             Status|NEW                         |RESOLVED
                 CC|                            |dtucker at dtucker.net

--- Comment #2 from Darren Tucker <dtucker at dtucker.net> ---
This indicates that the Message Authentication Code (ie the packet
integrity check) failed, likely due to a packet being modified in
transit.  The error message has changed due to some infrastructure
changes but this is the same as bug#845 and bug#510.

Things that have been known cause this in the past:
 - buggy or faulty network devices modifying packets in transit
(Linksys devices used to be notorious for it, eg bug#510).
 - buggy NIC hardware, firmware or drivers, particularly TCP offload.
 - bad RAM
 - buggy compilers, particularly miscompiled OpenSSL libraries

I don't recall any instance where it was actually a problem in OpenSSH
itself.  If you do figure it out, please add whatever you find to

*** This bug has been marked as a duplicate of bug 845 ***

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