==========================================================================
Ubuntu Security Notice USN-4498-1
September 15, 2020

ruby-loofah vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 16.04 LTS

Summary:

Loofah could be made to perform XSS attacks if a crafted SVG element is
republished

Software Description:
– ruby-loofah: manipulation and transformation of HTML/XML documents and
fragments

Details:

It was discovered that Loofah does not properly sanitize JavaScript in
sanitized output. An attacker could possibly use this issue to perform
XSS attacks. (CVE-2019-15587)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS:
ruby-loofah 2.0.3-2+deb9u3build0.16.04.1

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4498-1
CVE-2019-15587

Package Information:

https://launchpad.net/ubuntu/+source/ruby-loofah/2.0.3-2+deb9u3build0.16.04.1

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