Note: This is a public test instance of Red Hat Bugzilla. The data contained within is a snapshot of the live data so any changes you make will not be reflected in the production Bugzilla. Email is disabled so feel free to test any aspect of the site that you want. File any problems you find or give feedback at bugzilla.redhat.com.
Bug 1838281 (CVE-2020-8161) - CVE-2020-8161 rubygem-rack: directory traversal in Rack::Directory
Summary: CVE-2020-8161 rubygem-rack: directory traversal in Rack::Directory
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-8161
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1838282 1838283 1839028 1839042 1839043 1839932 1843958 1849674
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-05-20 19:44 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-12-14 18:47 UTC (History)
41 users (show)

Fixed In Version: rack 2.1.3, rack 2.2.0
Doc Type: If docs needed, set a value
Doc Text:
A directory traversal vulnerability was found in the Rack::Directory app that is bundled with Rack. If certain directories exist in a director managed by the Rack::Directory, this flaw allows an attacker to read the contents of files on the server outside of the root specified in the Rack::Directory initializer. The highest threat from this vulnerability is to confidentiality.
Clone Of:
Environment:
Last Closed: 2020-10-27 14:21:40 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:4366 0 None None None 2020-10-27 12:56:53 UTC

Description Guilherme de Almeida Suckevicz 2020-05-20 19:44:24 UTC 
There was a possible directory traversal vulnerability in the Rack::Directory app that is bundled with Rack. If certain directories exist in a director that is managed by `Rack::Directory`, an attacker could, using this vulnerability, read the contents of files on the server that were outside of the root specified in the Rack::Directory initializer.

Reference:
https://groups.google.com/forum/#!msg/rubyonrails-security/IOO1vNZTzPA/Ylzi1UYLAAAJ
Comment 1 Guilherme de Almeida Suckevicz 2020-05-20 19:44:50 UTC 
Created rubygem-rack tracking bugs for this issue:

Affects: epel-all [bug 1838283]
Affects: fedora-all [bug 1838282]
Comment 9 Summer Long 2020-05-25 05:56:04 UTC 
Upstream patches: 
https://github.com/rack/rack/commit/dddb7ad18ed79ca6ab06ccc417a169fde451246e
https://github.com/rack/rack/commit/775c836bdd25b63340399fea739532d746860a94
https://github.com/rack/rack/issues/1655
https://github.com/rack/rack/commit/e7ba1b0557d3ad97af1ef113bbeb5f27417983fa
Comment 12 Gerd Pokorra 2020-05-26 09:11:21 UTC 
I ask upstream to provide a new version that includes the security patches.
Comment 16 Hardik Vyas 2020-06-04 14:03:56 UTC 
External References:

https://groups.google.com/forum/#!msg/rubyonrails-security/IOO1vNZTzPA/Ylzi1UYLAAAJ
Comment 19 Summer Long 2020-06-14 23:38:47 UTC 
Statement:

Because the following products package the flawed code, but do not use its functionality (Rack::Directory), their impact has been reduced to 'Low':
* Red Hat CloudForms
* Red Hat OpenStack Platform 13.0 Operational Tools
* Red Hat Gluster Storage 3

Red Hat Satellite 6 ships the affected version of RubyGem Rack and is vulnerable to the flaw. However,  because attackers require shell access to exploit the vulnerability, Red Hat Product Security has rated this issue as having the security impact of Low for Satellite. A future update might address this issue.
Comment 20 errata-xmlrpc 2020-10-27 12:56:47 UTC 
This issue has been addressed in the following products:

  Red Hat Satellite 6.7 for RHEL 8

Via RHSA-2020:4366 https://access.redhat.com/errata/RHSA-2020:4366
Comment 21 Product Security DevOps Team 2020-10-27 14:21:40 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-8161
Note You need to log in before you can comment on or make changes to this bug.