Bug 1161499 (CVE-2014-7818)

Summary: CVE-2014-7818 rubygem-actionpack: arbitrary file existence disclosure
Product: [Other] Security Response Reporter: Ján Rusnačko <jrusnack>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: abaron, aortega, apatters, apevec, ayoung, bdunne, bkabrda, bkearney, cbillett, ccoleman, chrisw, dajohnso, dallan, dclarizi, dmcphers, gkotton, gmccullo, jfrey, jialiu, joelsmith, jokerman, jorton, jprause, jrafanie, jstribny, jvlcek, katello-bugs, kseifried, lhh, lmeyer, lpeer, markmc, mastahnke, mburns, mmaslano, mmccomas, mmcgrath, mmorsi, obarenbo, rbryant, rhos-maint, sclewis, sseago, tomckay, vanmeeuwen+fedora, vondruch, xlecauch, yeylon
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: rubygem-actionpack 3.2.20, rubygem-actionpack 4.0.11, rubygem-actionpack 4.1.7, rubygem-actionpack 4.2.0.beta3 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-11-12 21:48:15 UTC Type: ---
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: 1163511    
Bug Blocks: 1159118    

Description Ján Rusnačko 2014-11-07 09:12:00 UTC 
The following Ruby on Rails issue was reported[1]:

""
Arbitrary file existence disclosure in Action Pack

There is an information leak vulnerability in Action Pack. This vulnerability
has been assigned the CVE identifier CVE-2014-7818.

Versions Affected:  >= 3.0.0
Not affected:       <= 3.0.0
Fixed Versions:     3.2.20, 4.0.11, 4.1.7, 4.2.0.beta3

Impact
------
Specially crafted requests can be used to determine whether a file exists on the filesystem that is outside the Rails application's root directory.  The files will not be served, but attackers can determine whether or not the file exists.

This only impacts Rails applications that enable static file serving at
runtime.  For example, the application's production configuration will say:

  config.serve_static_assets = true

All users running an affected release should either upgrade or use one of the work arounds immediately.

Releases
--------
The 3.2.20, 4.0.11, 4.1.7 & 4.2.0.beta3 releases are available at the normal locations.

Workarounds
-----------
To work around this issue, set config.serve_static_assets = false in an initializer.  This work around will not be possible in all hosting environments and upgrading is advised.

""

[1] https://groups.google.com/forum/#!topic/rubyonrails-security/dCp7duBiQgo
Comment 1 Ján Rusnačko 2014-11-07 09:27:44 UTC 
External References:

https://groups.google.com/forum/#!topic/rubyonrails-security/dCp7duBiQgo
Comment 2 Ján Rusnačko 2014-11-07 09:37:31 UTC 
Upstream patches:
https://github.com/rails/rails/commit/9e408e7ae63b1a87ead2671408e53ff1a22fdc08
https://github.com/rails/rails/commit/c05f3bdd64e6f1000c48c17803ce759194db5e8c
https://github.com/rails/rails/commit/3437f260a5903b651bf8b8f751345fb288fa9052
https://github.com/rails/rails/commit/9c37d8eb8821aa8dd5ac395ae85344a63ae0e23c
Comment 3 Ján Rusnačko 2014-11-07 10:05:08 UTC 
Acknowledgements:

Red Hat would like to thank the Ruby on Rails project for reporting this issue. Upstream acknowledges Eaden McKee, Dennis Hackethal & Christian Hansen of Crowdcurity, Juan C. Müller & Mike McClurg of Greenhouse.io, and Alex Ianus of Coinbase as the independent, original reporters.
Comment 4 Vincent Danen 2014-11-12 21:48:15 UTC 
Statement:

Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Comment 5 Vincent Danen 2014-11-12 21:48:42 UTC 
Created rubygem-actionpack tracking bugs for this issue:

Affects: fedora-all [bug 1163511]