Bug 1470687 (CVE-2017-11173) - CVE-2017-11173 rubygem-rack-cors: Missing anchor in generated regex in rack/cors.rb#L256 may permit forged malicious requests
Summary: CVE-2017-11173 rubygem-rack-cors: Missing anchor in generated regex in rack/c...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: CVE-2017-11173
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: 1470688 1470689
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-07-13 13:06 UTC by Pedro Sampaio
Modified: 2019-09-29 14:16 UTC (History)
1 user (show)

Fixed In Version:
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Last Closed: 2018-12-31 16:08:10 UTC
Embargoed:

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Description Pedro Sampaio 2017-07-13 13:06:12 UTC 
Missing anchor in generated regex for rack-cors before 0.4.1
allows a malicious third-party site to perform CORS requests.
If the configuration were intended to allow only the trusted
example.com domain name and not the malicious example.net domain name,
then example.com.example.net (as well as example.com-example.net) would
be inadvertently allowed.

Upstream patch:

https://github.com/cyu/rack-cors/commit/42ebe6caa8e85ffa9c8a171bda668ba1acc7a5e6

References:

https://github.com/cyu/rack-cors/blob/v0.4.0/lib/rack/cors.rb#L256
https://packetstormsecurity.com/files/143345/rack-cors-Missing-Anchor.html
Comment 1 Pedro Sampaio 2017-07-13 13:06:35 UTC 
Created rubygem-rack-cors tracking bugs for this issue:

Affects: epel-all [bug 1470688]
Affects: fedora-all [bug 1470689]
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