Bug 829802 - sysnet_read_config does not allow reading symlinks
Summary: sysnet_read_config does not allow reading symlinks
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy-targeted
Version: 17
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Miroslav Grepl
QA Contact: Ben Levenson
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-06-07 15:16 UTC by jbash
Modified: 2012-06-17 00:05 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2012-06-17 00:05:32 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

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.


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