Bug 1775111 (CVE-2019-18978)

Summary:	CVE-2019-18978 rubygem-rack-cors: allows ../ directory traversal to access private resources
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	valtri
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-11-21 13:05:00 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1775112, 1775114
Bug Blocks:

Description Dhananjay Arunesh 2019-11-21 12:18:39 UTC

An issue was discovered in the rack-cors (aka Rack CORS Middleware) gem before 1.0.4 for Ruby. It allows ../ directory traversal to access private resources because resource matching does not ensure that pathnames are in a canonical format.

Reference:
https://github.com/cyu/rack-cors/commit/e4d4fc362a4315808927011cbe5afcfe5486f17d
https://github.com/cyu/rack-cors/compare/v1.0.3...v1.0.4

Comment 1 Dhananjay Arunesh 2019-11-21 12:19:04 UTC

Created rubygem-rack-cors tracking bugs for this issue:

Affects: epel-all [bug 1775114]
Affects: fedora-all [bug 1775112]

Comment 2 Product Security DevOps Team 2019-11-21 13:05:00 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.