Bug 829802

Summary:	sysnet_read_config does not allow reading symlinks
Product:	[Fedora] Fedora	Reporter:	jbash <jbash>
Component:	selinux-policy-targeted	Assignee:	Miroslav Grepl <mgrepl>
Status:	CLOSED ERRATA	QA Contact:	Ben Levenson <benl>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	17	CC:	dwalsh
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-06-17 00:05:32 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:

Description jbash 2012-06-07 15:16:31 UTC

Description of problem:

The sysnet_read_config macro doesn't let the subject read symbolic
links in the network configuration.


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

3.10.0-128.fc17

How reproducible:

Perfectly reproducible

Steps to Reproduce:

1. Create a symbolic link, to, say, an ifcfg-xxx file in /etc/sysconfig/network-scripts
2. Create a policy module that grants sysnet_read_config to a domain
3. Run something in that domain and have it try to follow the symlink
  
Actual results:

Access denied.

Expected results:

Access permitted; there's no important difference between accessing the file
directly and accessing it via a symlink, nor can the content of a symlink
in the network config reasonably be expected to reveal anything sensitive.

Comment 1 Daniel Walsh 2012-06-07 16:23:09 UTC

Fixed in selinux-policy-3.10.0-129.fc17

Comment 2 Fedora Update System 2012-06-11 21:03:45 UTC

selinux-policy-3.10.0-130.fc17 has been submitted as an update for Fedora 17.
https://admin.fedoraproject.org/updates/selinux-policy-3.10.0-130.fc17

Comment 3 Fedora Update System 2012-06-16 00:00:40 UTC

Package selinux-policy-3.10.0-130.fc17:
* should fix your issue,
* was pushed to the Fedora 17 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing selinux-policy-3.10.0-130.fc17'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2012-9520/selinux-policy-3.10.0-130.fc17
then log in and leave karma (feedback).

Comment 4 Fedora Update System 2012-06-17 00:05:32 UTC

selinux-policy-3.10.0-130.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.