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
CVE-2017-11173 rubygem-rack-cors: Missing anchor in generated regex in rack/c...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20170713,repor...
: Security
Depends On: 1470688 1470689
Blocks:
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Reported: 2017-07-13 09:06 EDT by Pedro Sampaio
Modified: 2017-07-13 09:06 EDT (History)
1 user (show)

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Description Pedro Sampaio 2017-07-13 09:06:12 EDT
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 09:06:35 EDT
Created rubygem-rack-cors tracking bugs for this issue:

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

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