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USN-4475-1: Chrony vulnerability

27 August 2020

Chrony could be made to crash or expose sensitive information.



  • chrony - An implementation of the Network Time Protocol


It was discovered that Chrony incorrectly handled certain symbolic links.
An attacker could possibly use this issue to cause a denial of service or
expose sensitive information.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04
Ubuntu 18.04

In general, a standard system update will make all the necessary changes.