Debian Jessie DSA-3629-1 Critical: NTP Security Flaws and Fixes

Several vulnerabilities were discovered in the Network Time Protocol
daemon and utility programs:

CVE-2015-7974

Matt Street discovered that insufficient key validation allows
impersonation attacks between authenticated peers.

CVE-2015-7977 / CVE-2015-7978

Stephen Gray discovered that a NULL pointer dereference and a
buffer overflow in the handling of "ntpdc reslist" commands may
result in denial of service.

CVE-2015-7979

Aanchal Malhotra discovered that if NTP is configured for broadcast
mode, an attacker can send malformed authentication packets which
break associations with the server for other broadcast clients.

CVE-2015-8138

Matthew van Gundy and Jonathan Gardner discovered that missing
validation of origin timestamps in ntpd clients may result in denial
of service.

CVE-2015-8158

Jonathan Gardner discovered that missing input sanitising in ntpq
may result in denial of service.

CVE-2016-1547

Stephen Gray and Matthew van Gundy discovered that inc...