Dropbear 2019.77

Matt Johnston matt at ucc.asn.au
Sun Mar 24 20:46:31 AWST 2019


Beware that dbclient in 2019.77 has a regression, it won't 
reset TTY modes on exit. That's fixed in
https://secure.ucc.asn.au/hg/dropbear/rev/4b01f4826a29

Cheers,
Matt

On Sat, Mar 23, 2019 at 10:02:49PM +0800, Matt Johnston wrote:
> Hi all,
> 
> At long last Dropbear 2019.77 is released. Most changes are
> bug fixes, with a few small features. There are security
> fixes to avoid revealing the existence of valid usernames.
> 
> This release also merges the fuzzing branch. In a
> normal build this should have no effect on operation.
> 
> There are a few larger changes that are ready to merge
> that will have to wait for the next release - I wanted to
> get this bugfix out of the way first.
> 
> Download at
> https://matt.ucc.asn.au/dropbear/dropbear.html
> mirror
> https://dropbear.nl/mirror/dropbear.html
> 
> Cheers,
> Matt
> 
> 2019.77 - 23 March 2019
> 
> - Fix server -R option with ECDSA - only advertise one key size which will be accepted.
>   Reported by Peter Krefting, 2018.76 regression.
> 
> - Fix server regression in 2018.76 where multiple client -R forwards were all forwarded 
>   to the first destination. Reported by Iddo Samet.
> 
> - Make failure delay more consistent to avoid revealing valid usernames, set server password 
>   limit of 100 characters. Problem reported by usd responsible disclosure team
> 
> - Change handling of failed authentication to avoid disclosing valid usernames,
>   CVE-2018-15599. 
> 
> - Fix dbclient to reliably return the exit code from the remote server.
>   Reported by W. Mike Petullo
> 
> - Fix export of 521-bit ECDSA keys, from Christian Hohnstädt
> 
> - Add -o Port=xxx option to work with sshfs, from xcko
> 
> - Merged fuzzing code, see FUZZER-NOTES.md
> 
> - Add a DROPBEAR_SVR_MULTIUSER=0 compile option to run on 
>   single-user Linux kernels (CONFIG_MULTIUSER disabled). From Patrick Stewart
> 
> - Increase allowed username to 100 characters, reported by W. Mike Petullo
> 
> - Update config.sub and config.guess, should now work with RISC-V
> 
> - Cygwin compile fix from karel-m
> 
> - Don't require GNU sed (accidentally in 2018.76), reported by Samuel Hsu
> 
> - Fix for IRIX and writev(), reported by Kazuo Kuroi
> 
> - Other fixes and cleanups from François Perrad, Andre McCurdy, Konstantin Demin,
>   Michael Jones, Pawel Rapkiewicz


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