CVE-2016-4955
Published: 4 July 2016
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
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 |
Needs triage
|
|
| wily |
Ignored
(end of life)
|
|
| xenial |
Released
(1:4.2.8p4+dfsg-3ubuntu5.3)
|
|
| yakkety |
Not vulnerable
(1:4.2.8p8+dfsg-1ubuntu2)
|
|
| zesty |
Not vulnerable
(1:4.2.8p8+dfsg-1ubuntu2)
|
|
|
Patches:
vendor: http://pkgs.fedoraproject.org/cgit/rpms/ntp.git/tree/ntp-4.2.6p5-cve-2016-4955.patch |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.9 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |