chrony before 1.31.1 does not initialize the last “next” pointer when saving unacknowledged replies to command requests, which allows remote authenticated users to cause a denial of service (uninitialized pointer dereference and daemon crash) or possibly execute arbitrary code via a large number of command requests.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1822
Reference (s):
- BID:73956
- URL: http://www.securityfocus.com/bid/73956
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- DEBIAN:DSA-3222
- URL: http://www.debian.org/security/2015/dsa-3222