CVE-2015-5300
Published: 22 October 2015
The panic_gate check in NTP before 4.2.8p5 is only re-enabled after the first change to the system clock that was greater than 128 milliseconds by default, which allows remote attackers to set NTP to an arbitrary time when started with the -g option, or to alter the time by up to 900 seconds otherwise by responding to an unspecified number of requests from trusted sources, and leveraging a resulting denial of service (abort and restart).
Notes
| Author | Note |
|---|---|
| mdeslaur | as of 2015-10-22, not yet fixed upstream patch in redhat bug, but improved patch in comment #3 is restricted |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
ntp Launchpad, Ubuntu, Debian |
precise |
Released
(1:4.2.6.p3+dfsg-1ubuntu3.6)
|
| trusty |
Released
(1:4.2.6.p5+dfsg-3ubuntu2.14.04.5)
|
|
| upstream |
Needs triage
|
|
| vivid |
Released
(1:4.2.6.p5+dfsg-3ubuntu6.2)
|
|
| wily |
Released
(1:4.2.6.p5+dfsg-3ubuntu8.1)
|
|
|
Patches: vendor: https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2015-5300 vendor: http://pkgs.fedoraproject.org/cgit/ntp.git/plain/ntp-4.2.6p5-cve-2015-5300.patch |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |