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Bug 1568842 - (CVE-2018-3741) CVE-2018-3741 rubygem-rails-html-sanitizer: non-whitelisted attributes are present in sanitized output when input with specially-crafted HTML fragments leading to XSS vulnerability
CVE-2018-3741 rubygem-rails-html-sanitizer: non-whitelisted attributes are pr...
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=20180321,repor...
: Security
Depends On: 1568845 1569130 1569131 1559658 1576590 1576591
Blocks: 1568847
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Reported: 2018-04-18 06:17 EDT by Adam Mariš
Modified: 2018-05-31 14:46 EDT (History)
21 users (show)

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Fixed In Version: rubygem-rails-html-sanitizer 1.0.4
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Description Adam Mariš 2018-04-18 06:17:48 EDT 
There is a possible XSS vulnerability in all rails-html-sanitizer gem versions below 1.0.4 for Ruby. The gem allows non-whitelisted attributes to be present in sanitized output when input with specially-crafted HTML fragments, and these attributes can lead to an XSS attack on target applications. This issue is similar to CVE-2018-8048 in Loofah. All users running an affected release should either upgrade or use one of the workarounds immediately.

Upstream fix:

https://github.com/rails/rails-html-sanitizer/commit/f3ba1a839a35f2ba7f941c15e239a1cb379d56ae
Comment 1 Adam Mariš 2018-04-18 06:18:19 EDT 
Created rubygem-rails-html-sanitizer tracking bugs for this issue:

Affects: fedora-all [bug 1568845]
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