chrony before 1.31.1 does not properly protect state variables in authenticated symmetric NTP associations, which allows remote attackers with knowledge of NTP peering to cause a denial of service (inability to synchronize) via random timestamps in crafted NTP data packets.
chrony versiones anteriores a 1.31.1, no protege apropiadamente las variables de estado en asociaciones NTP simétricas autenticadas, lo que permite a atacantes remotos con conocimiento del emparejamiento NTP causar una denegación de servicio (incapacidad de sincronización) mediante marcas de tiempo aleatorias en paquetes de datos NTP diseñados.
A denial of service flaw was found in the way chrony hosts that were peering with each other authenticated themselves before updating their internal state variables. An attacker could send packets to one peer host, which could cascade to other peers, and stop the synchronization process among the reached peers.
