обновление безопасности
PowerDNS Authoritative daemon , all versions pdns 4.1.x before pdns 4.1.10, exiting when encountering a serial between 2^31 and 2^32-1 while trying to notify a slave leads to DoS.
https://security-tracker.debian.org/tracker/DSA-5626-1
https://security-tracker.debian.org/tracker/DSA-5626-2