version 1.1.5

The NTPsec Project is pleased to announce the tagging of version 1.1.5


We do not normally ship a release only one week after the previous, however it is HIGHLY RECOMMENDED that if you are using NTS you upgrade to this version.

We have added ALPN to be consistent with the NTS draft. And we have discovered and fixed a buffer overrun in debug compile of ALPN implementation. If you are running NTPsec 1.1.4 with NTS turned on and with with the compile time debug flags turned on, it is possible for an attacker to send a packet that will crash your server.

As aways, read the …​/NEWS file, and the git log and git history.


On this day in 1972 the first leap second is added to the UTC time system.

Getting this release

As always, you can clone the git repo from and you can download the release tarballs with sums and signatures from

This release is signed with the GPG key id 0x5A22E330161C3978.