For Debian 9 "Stretch", this problem has been fixed in version
2.0-8-g175a01c-4+deb9u2.
We recommend that you upgrade your csync2 packages.
For the detailed security status of csync2 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/csync2
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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