Bug 1170576 - AVC denial about /var/tmp/HTTP_0 prevents GSS-Proxy to do authentication for mod_auth_kerb
Summary: AVC denial about /var/tmp/HTTP_0 prevents GSS-Proxy to do authentication for ...
Keywords:
Status: CLOSED EOL
Alias: None
Product: Fedora
Classification: Fedora
Component: gssproxy
Version: 21
Hardware: Unspecified
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Robbie Harwood
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-12-04 11:13 UTC by Jan Pazdziora
Modified: 2015-12-02 16:37 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-12-02 05:27:15 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

Description Jan Pazdziora 2014-12-04 11:13:38 UTC
Description of problem:

When using the GSS-Proxy with mod_auth_kerb based on

   https://fedorahosted.org/gss-proxy/wiki/Apache

on Fedora 21, I get Internal Server Error. I also get AVC denial

type=AVC msg=audit(1417690943.120:572): avc:  denied  { create } for  pid=32439 comm="gssproxy" name="HTTP_0" scontext=system_u:system_r:gssproxy_t:s0 tcontext=system_u:object_r:tmp_t:s0 tclass=file permissive=0

and it seems to be the problem -- after switching to Permissive, things start to work.

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

httpd-2.4.10-9.fc21.x86_64
mod_auth_kerb-5.4-30.fc21.x86_64
gssproxy-0.3.1-4.fc21.x86_64

How reproducible:

Deterministic.

Steps to Reproduce:
1. Configure httpd with mod_auth_kerb to use GSS-Proxy, based on https://fedorahosted.org/gss-proxy/wiki/Apache
2. Run curl --negotiate -u : http://<the-httpd-server>/private

Actual results:

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
[...]

and the error_log on the server says

[auth_kerb:error] [pid 10422] [client 10.16.96.136:60242] gss_acquire_cred() failed: Unspecified GSS failure.  Minor code may provide more information (, Permission denied)

Expected results:

OK

Additional info:

This is based on the report in bug 1047776 comment 11.

It is a regression against Fedora 20 where the AVC denial was there as well but the file /var/tmp/HTTP_0 got created even in Enforcing and authentication worked.

This looks related to bug 1008777 which tracks the AVC denial which on RHEL 7 and Fedora 20 do not prevent the authentication. Things have regressed in Fedora 21.

Comment 1 Fedora Admin XMLRPC Client 2015-05-28 19:01:45 UTC
This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

Comment 2 Fedora Admin XMLRPC Client 2015-09-04 00:08:40 UTC
This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.

Comment 3 Fedora End Of Life 2015-11-04 10:36:36 UTC
This message is a reminder that Fedora 21 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
and issuing updates for Fedora 21. 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 '21'.

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 21 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 
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Comment 4 Fedora End Of Life 2015-12-02 05:27:18 UTC
Fedora 21 changed to end-of-life (EOL) status on 2015-12-01. Fedora 21 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
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