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CVE-2015-5300

Publication date 22 October 2015

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

7.5 · High

Score breakdown

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).

Read the notes from the security team

Status

Package Ubuntu Release Status
ntp 15.10 wily
Fixed 1:4.2.6.p5+dfsg-3ubuntu8.1
15.04 vivid
Fixed 1:4.2.6.p5+dfsg-3ubuntu6.2
14.04 LTS trusty
Fixed 1:4.2.6.p5+dfsg-3ubuntu2.14.04.5
12.04 LTS precise
Fixed 1:4.2.6.p3+dfsg-1ubuntu3.6

Notes


mdeslaur

as of 2015-10-22, not yet fixed upstream patch in redhat bug, but improved patch in comment #3 is restricted

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
ntp

Severity score breakdown

Parameter Value
Base score 7.5 · High
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

References

Related Ubuntu Security Notices (USN)

Other references