Bug 895277 (CVE-2012-6109)

Summary:	CVE-2012-6109 rubygem-rack: parsing Content-Disposition header DoS
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	athomas, bkabrda, bkearney, bleanhar, cpelland, dajohnso, esammons, iboverma, jeckersb, jialiu, jrusnack, katello-bugs, katello-internal, lmeyer, mcressma, mfisher, mmccune, mmcgrath, mmorsi, morazi, mrg-program-list, msuchy, sclewis, vanmeeuwen+fedora, vondruch
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-11-24 16:25:31 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:	771152, 895285, 895397, 895398, 895400, 895401, 995680, 1165360
Bug Blocks:	892883, 895284, 906653

Description Vincent Danen 2013-01-14 23:48:12 UTC

Upstream released [1] Rack 1.4.2, 1.3.7, 1.2.6, and 1.1.4 to fix a denial of service condition when Rack parses content with a certain Content-Disposition header as noted in the original report [2].

This has been fixed in git [3].

Additionally, a second flaw that was fixed in 1.4.4, 1.3.9, 1.2.7, and 1.1.5 was also announced [4] that creates a minor denial of service condition, this time in the Rack::Auth::AbstractRequest, where it symbolized arbitrary strings (apparently this has something to do with authentication, but there is no further information provided other than the fix [5] itself, which is noted as "a breaking API change").

[1] http://rack.github.com/
[2] https://groups.google.com/forum/#!msg/rack-devel/1w4_fWEgTdI/XAkSNHjtdTsJ
[3] https://github.com/rack/rack/commit/4fc44671b3cad569421f4f8b775c0590b86f575e
[4] https://groups.google.com/forum/#!topic/rack-devel/ImYOqcGiksw/discussion
[5] https://github.com/rack/rack/commit/0c76175fcccad74ba2f991c487d3669c28a297c8

Comment 1 Vincent Danen 2013-01-15 00:22:06 UTC

Created rubygem-rack tracking bugs for this issue

Affects: fedora-all [bug 895285]

Comment 2 Vincent Danen 2013-01-15 00:23:41 UTC

Created rubygem-rack tracking bugs for this issue

Affects: epel-all [bug 771152]

Comment 3 Kurt Seifried 2013-01-15 07:30:41 UTC

This bug now refers only to:

Upstream released [1] Rack 1.4.2, 1.3.7, 1.2.6, and 1.1.4 to fix a denial of service condition when Rack parses content with a certain Content-Disposition header as noted in the original report [2].

This has been fixed in git [3].

[1] http://rack.github.com/
[2] https://groups.google.com/forum/#!msg/rack-devel/1w4_fWEgTdI/XAkSNHjtdTsJ
[3] https://github.com/rack/rack/commit/4fc44671b3cad569421f4f8b775c0590b86f575e

The second flaw was split into bz 895384

Comment 8 John Eckersberg 2013-01-16 16:18:26 UTC

This is the correct patch for rack-1.3: https://github.com/rack/rack/commit/c9f65df37a151821eb88ddd1dc404b83e52c52d5

Comment 9 Fedora Update System 2013-01-25 21:33:46 UTC

rubygem-rack-1.3.0-3.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 10 Fedora Update System 2013-01-25 21:37:25 UTC

rubygem-rack-1.4.0-4.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 11 Fedora Update System 2013-01-25 21:43:35 UTC

rubygem-rack-1.4.0-3.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 12 errata-xmlrpc 2013-02-21 19:05:26 UTC

This issue has been addressed in following products:

  CloudForms for RHEL 6

Via RHSA-2013:0548 https://rhn.redhat.com/errata/RHSA-2013-0548.html

Comment 13 errata-xmlrpc 2013-02-21 19:21:28 UTC

This issue has been addressed in following products:

  Red Hat Subscription Asset Manager 1.2

Via RHSA-2013:0544 https://rhn.redhat.com/errata/RHSA-2013-0544.html