CVE-2016-2517
Published: 30 January 2017
NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE: this vulnerability exists because of a CVE-2016-2516 regression.
Notes
Author | Note |
---|---|
mdeslaur | isn't really considered a security issue since remote user can do other equivalent configuration changes, ignoring. |
Priority
Status
Package | Release | Status |
---|---|---|
ntp Launchpad, Ubuntu, Debian |
precise |
Ignored
|
trusty |
Ignored
|
|
upstream |
Released
(1:4.2.8p7+dfsg-1)
|
|
wily |
Ignored
|
|
xenial |
Ignored
|
|
Patches: upstream: http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=56c78c41-oKNCUhyU5kKQCxLjnp0Fw upstream: http://bk1.ntp.org/ntp-stable/?PAGE=patch&REV=56c977bdf6CLtHiqg1_rd2II7E0dqA |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.3 |
Attack vector | Network |
Attack complexity | High |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |