Bug 1550223 (CVE-2018-7183)

Summary:	CVE-2018-7183 ntp: decodearr() can write beyond its buffer limit
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	linville, mlichvar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	ntp 4.2.8p11	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-21 19:57:21 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1550228, 1550229
Bug Blocks:	1550226

Description Pedro Sampaio 2018-02-28 19:48:09 UTC

ntpq is a monitoring and control program for ntpd. decodearr() is an internal function of ntpq that is used to -- wait for it -- decode an array in a response string when formatted data is being displayed. This is a problem in affected versions of ntpq if a maliciously-altered ntpd returns an array result that will trip this bug, or if a bad actor is able to read an ntpq request on its way to a remote ntpd server and forge and send a response before the remote ntpd sends its response. It's potentially possible that the malicious data could become injectable/executable code.

References:

http://support.ntp.org/bin/view/Main/NtpBug3414

Comment 1 Pedro Sampaio 2018-02-28 19:51:33 UTC

Created ntp tracking bugs for this issue:

Affects: fedora-all [bug 1550228]