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Message-ID: <CAGJbjKasPtcqfRSrsyg=Ae_oM6xknf9V4qyUoFW6aTsL3rLkaw@mail.gmail.com>
Date: Tue, 22 Oct 2019 09:15:06 -0400
From: Mike Dalessio <mike.dalessio@...il.com>
To: ruby-security-ann@...glegroups.com, rubyonrails-security@...glegroups.com,
oss-security@...ts.openwall.com, loofah-talk@...glegroups.com
Subject: [CVE-2019-15587] Loofah XSS Vulnerability
Hello all,
A *medium* severity vulnerability has been identified and patched in Loofah
v2.3.1, which is a dependency of `rails-html-sanitizer`. This issue has
been assigned CVE-2019-15587.
The public notice can be found here:
https://github.com/flavorjones/loofah/issues/171
To save you a click, I've reproduced the contents of the announcement here.
---
*# CVE-2019-15587 - Loofah XSS Vulnerability*
This issue has been created for public disclosure of an XSS vulnerability
that was responsibly reported by https://hackerone.com/vxhex
I'd like to thank [HackerOne](https://hackerone.com/loofah) for providing a
secure, responsible mechanism for reporting, and for providing their
fantastic service to the Loofah maintainers.
*## Severity*
Loofah maintainers have evaluated this as [Medium (CVSS3 6.4)](
https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
).
*## Description*
In the Loofah gem, through v2.3.0, unsanitized JavaScript may occur in
sanitized output when a crafted SVG element is republished.
*## Affected Versions*
Loofah < v2.3.0
*## Mitigation*
Upgrade to Loofah v2.3.1 or later.
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