CVE-2016-1547
Published: 29 April 2016
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | fedora patch for CVE-2015-7979 also covers this CVE |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
ntp Launchpad, Ubuntu, Debian |
precise |
Released
(1:4.2.6.p3+dfsg-1ubuntu3.11)
|
| trusty |
Released
(1:4.2.6.p5+dfsg-3ubuntu2.14.04.10)
|
|
| upstream |
Released
(1:4.2.8p7+dfsg-1)
|
|
| wily |
Ignored
(end of life)
|
|
| xenial |
Released
(1:4.2.8p4+dfsg-3ubuntu5.3)
|
|
| yakkety |
Not vulnerable
(1:4.2.8p4+dfsg-3ubuntu6)
|
|
| zesty |
Not vulnerable
(1:4.2.8p4+dfsg-3ubuntu6)
|
|
|
Patches: upstream: http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=56ca82fbM-SM7MAKmqf27DRTW1r6KQ upstream: http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=5719625aNcSIWNqKMs4tNUS8r4xp-Q vendor: http://pkgs.fedoraproject.org/cgit/rpms/ntp.git/tree/ntp-4.2.6p5-cve-2015-7979.patch |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.3 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | Low |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |