[dnsdist] TCP short writes handling issue fixed in master
remi.gacogne at powerdns.com
Fri Jul 7 09:11:45 UTC 2017
Yesterday we fixed  an issue  in dnsdist's TCP handling that could
have led to corrupted responses being sent over TCP.
The issue was introduced in  and is not present in any released
version of dnsdist. However if you are running a master version of
dnsdist I would advise to upgrade your packages. Pre-built packages can
be found in our repositories  as usual.
This issue requires very large answers from the backend toward the
client to happen, and as such is quite unlikely to occur for anything
else than AXFR answers. The content of corrupted answers is not random
but contain the same data twice, making it unlikely to be mistaken for a
correct DNS answer.
Thanks to Scott McGillivray for reporting the issue.
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