Andrew Tridgell has announced
the release of rsync 3.4.4 with
fixes for the regressions introduced in the 3.4.3 release. He also
notes there will be an rsync 3.5.0 soon, with many more security
updates:

As part of the 3.5.0 release update I have created a
rsync-security@lists.samba.org mailing list for anyone who is willing
to do testing of the 3.5.0 release. The idea is to try to reduce the
chance of more regressions by expanding the set of testers of this
release. I have seeded it with people who were involved in past rsync
security issues. If you want to join this list then the easiest way
would be for you to be vouched for by someone on the
distros@vs.openwall.org list or someone else I already trust.

My apologies for the regressions in the 3.4.3 release and I hope future
security updates for rsync will have less issues. The greatly expanded test
suite in rsync 3.5 combined with the rsync-security mailing list should
help.

https://lwn.net/Articles/1076989/
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