CVE-2015-7853

Published: 22 October 2015

The datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative input value.

Priority

Cvss 3 Severity Score

9.8

Score breakdown

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: upstream: https://github.com/ntp-project/ntp/commit/8482b536f9494a5d45196ab5b7e13040f5940261

Severity score breakdown

Parameter	Value
Base score	9.8
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Bugs

http://bugs.ntp.org/show_bug.cgi?id=2920

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