Bug 1384100 - Selinux prevents spice viewer plugin from writing screenshots
Summary: Selinux prevents spice viewer plugin from writing screenshots
Keywords:
Status: CLOSED EOL
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: 24
Hardware: All
OS: Linux
unspecified
medium
Target Milestone: ---
Assignee: Lukas Vrabec
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-10-12 14:21 UTC by Joe Wright
Modified: 2017-08-08 19:24 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2017-08-08 19:24:14 UTC
Type: Bug


Attachments (Terms of Use)

Description Joe Wright 2016-10-12 14:21:21 UTC
Description of problem:
- The spice plugin appears to be running under the mozilla_plugin_t domain, which prevents write to disk. This outright breaks the ability to write screenshots to any location. Temporarily flipping selinux to permissive mode is the workaround. Alternative is to set the context to permissive persistently, however this opens up other potential security risks.

Oct 12 09:42:40 localhost audit: AVC avc:  denied  { write } for  pid=2099 comm="remote-viewer" path="/home/$user/Pictures/kdescreenshot.png" dev="dm-4" ino=794816 scontext=unconfined_u:unconfined_r:mozilla_plugin_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1


Version-Release number of selected component (if applicable):
- spice-xpi-2.8.90-10.fc24.x86_64
- selinux-policy-3.13.1-191.fc24.3.noarch
- firefox-47.0.1-2.fc24.x86_64


How reproducible:
- 100%

Steps to Reproduce:
1. View a virtual machine console through RHEV
2. Click on 'File -> Screenshot' and choose the target save location/filename
3. Observe that the file never saves. Can view AVC denial in /var/log/messages

Actual results:
- File write failure

Expected results:
- File write successful

Additional info:

Comment 1 Fedora End Of Life 2017-07-25 23:26:51 UTC
This message is a reminder that Fedora 24 is nearing its end of life.
Approximately 2 (two) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 24. It is Fedora's policy to close all
bug reports from releases that are no longer maintained. At that time
this bug will be closed as EOL if it remains open with a Fedora  'version'
of '24'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version'
to a later Fedora version.

Thank you for reporting this issue and we are sorry that we were not
able to fix it before Fedora 24 is end of life. If you would still like
to see this bug fixed and are able to reproduce it against a later version
of Fedora, you are encouraged  change the 'version' to a later Fedora
version prior this bug is closed as described in the policy above.

Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
bugs or makes them obsolete.

Comment 2 Fedora End Of Life 2017-08-08 19:24:14 UTC
Fedora 24 changed to end-of-life (EOL) status on 2017-08-08. Fedora 24 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this
bug.

Thank you for reporting this bug and we are sorry it could not be fixed.


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