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Bug 1122012

Summary:	SHM refclock allows only two units with owner-only access
Product:	Red Hat Enterprise Linux 7	Reporter:	Miroslav Lichvar <mlichvar>
Component:	ntp	Assignee:	Miroslav Lichvar <mlichvar>
Status:	CLOSED ERRATA	QA Contact:	Jakub Prokes <jprokes>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.0	CC:	ccui, jprokes, jscotka, ovasik
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	ntp-4.2.6p5-20.el7	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	1122015 (view as bug list)		Environment:
Last Closed:	2015-11-19 08:37:30 UTC	Type:	Bug
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:
Bug Blocks:	1122015, 1191019

Description Miroslav Lichvar 2014-07-22 11:07:33 UTC

Description of problem:
Currently, the permissions of the shared memory segment created by the SHM refclock are set from the unit number. Units 0 and 1 are created with owner-only access, units 2 and above have world access. This is a problem in applications where more units than two are needed and world access would be a security problem.

Upstream bug report with a patch:
http://bugs.ntp.org/show_bug.cgi?id=2627

Version-Release number of selected component (if applicable):
4.2.6p5-18

How reproducible:
Always

Steps to Reproduce:
1. add "server 127.127.28.2" to ntp.conf
2. restart ntpd
3. run ipcs
4. check permission of the memory segment with key 0x4e545032

Actual results:
666

Expected results:
600

Additional info:

Comment 6 errata-xmlrpc 2015-11-19 08:37:30 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2015-2231.html