Bug 1397319 – CVE-2016-9310 ntp: Mode 6 unauthenticated trap information disclosure and DDoS vector

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Bug 1397319 - (CVE-2016-9310) CVE-2016-9310 ntp: Mode 6 unauthenticated trap information disclosure and DDoS vector

Summary:	CVE-2016-9310 ntp: Mode 6 unauthenticated trap information disclosure and DDo...

Status:	CLOSED ERRATA

Aliases:	CVE-2016-9310

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20161121,repor...
Keywords:	Security

Depends On:	1397351 1411642 1411643 1411644 1411645
Blocks:	1397349
	Show dependency tree / graph

Reported:	2016-11-22 05:21 EST by Adam Mariš
Modified:	2017-02-06 01:50 EST (History)
CC List:	8 users (show)

See Also:
Fixed In Version:	ntp 4.2.8p9
Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the control mode functionality of ntpd. A remote attacker could send a crafted control mode packet which could lead to information disclosure or result in DDoS amplification attacks.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2017-02-06 01:50:18 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2017:0252	normal	SHIPPED_LIVE	Moderate: ntp security update	2017-02-06 06:16:56 EST

Groups: None (edit)

Description Adam Mariš 2016-11-22 05:21:09 EST

An exploitable configuration modification vulnerability exists in the control mode (mode 6) functionality of ntpd. If, against long-standing BCP recommendations, "restrict default noquery ..." is not specified, a specially crafted control mode packet can set ntpd traps, providing information disclosure and DDoS amplification, and unset ntpd traps, disabling legitimate monitoring. A remote, unauthenticated, network attacker can trigger this vulnerability.

External References:

http://support.ntp.org/bin/view/Main/NtpBug3118

Comment 1 Adam Mariš 2016-11-22 06:09:17 EST

Created ntp tracking bugs for this issue:

Affects: fedora-all [bug 1397351]

Comment 2 Huzaifa S. Sidhpurwala 2016-12-14 03:11:23 EST

Mitigation:

Use "restrict default noquery ..." in your ntp.conf file.

Comment 4 Keyur Pujara 2017-01-16 06:31:07 EST

Is an RPM released with fix for this. I haven't seen one @ http://mirror.centos.org. 

If not released, what is ETA for same?

Thanks, Keyur

Comment 7 errata-xmlrpc 2017-02-06 01:17:26 EST

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6
  Red Hat Enterprise Linux 7

Via RHSA-2017:0252 https://rhn.redhat.com/errata/RHSA-2017-0252.html

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