Debian Linux Security Advisory 1992-1 – Several vulnerabilities have been discovered in chrony, a pair of programs which are used to maintain the accuracy of the system clock on a computer. This issues are similar to the NTP security flaw CVE-2009-3563.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/85943/dsa-1992-1.txt
Source: https://packetstormsecurity.com/files/85943/Debian-Linux-Security-Advisory-1992-1.html