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

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

* CVE-2019-15587

--- Mystic BBS v1.12 A45 (Linux/64)
* Origin: BZ&BZ BBS (21:4/110)