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Date: Thu, 22 Mar 2018 15:10:58 -0400
From: Rafael Mendonça França
<rafaelmfranca@...il.com>
To: rubyonrails-security@...glegroups.com,
ruby-security-ann@...glegroups.com, oss-security@...ts.openwall.com
Subject: [CVE-2018-3741] XSS vulnerability in rails-html-sanitizer
Possible XSS vulnerability in rails-html-sanitizer
There is a possible XSS vulnerability in rails-html-sanitizer. This
vulnerability has been assigned the CVE identifier CVE-2018-3741.
Versions Affected: 1.0.3 or older.
Not affected: None.
Fixed Versions: 1.0.4
Impact
------
There is a possible XSS vulnerability in rails-html-sanitizer. 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.
Releases
--------
The FIXED releases are available at the normal locations.
Workarounds
-----------
There are no feasible workarounds for this issue.
Patches
-------
To aid users who aren't able to upgrade immediately we have provided patches for
the two supported release series. They are in git-am format and consist of a
single changeset.
* 1-0-sanitize_attributes.patch - Patch for 1.0 series
Credits
-------
Thanks to Kaarlo Haikonen for reporting this issue and Mike Dalessio for providing the original fix in the Loofah gem.
Rafael França
Content of type "text/html" skipped
Download attachment "1-0-santize_attributes.patch" of type "application/octet-stream" (5469 bytes)
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