| Name | CVE-2016-1547 |
| Description | An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-559-1, DSA-3629-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| ntp (PTS) | jessie, jessie (lts) | 1:4.2.6.p5+dfsg-7+deb8u3 | fixed |
| stretch | 1:4.2.8p10+dfsg-3+deb9u2 | fixed |
| buster, buster (lts) | 1:4.2.8p12+dfsg-4+deb10u1 | fixed |
| bullseye | 1:4.2.8p15+dfsg-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| ntp | source | wheezy | 1:4.2.6.p5+dfsg-2+deb7u7 | | DLA-559-1 | |
| ntp | source | jessie | 1:4.2.6.p5+dfsg-7+deb8u2 | | DSA-3629-1 | |
| ntp | source | (unstable) | 1:4.2.8p7+dfsg-1 | | | |
Notes
http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security