Debian: DSA-4364-1 Moderate: Ruby-Loofah SVG Sanitization Issue

It was discovered that ruby-loofah, a general library for manipulating
and transforming HTML/XML documents and fragments, performed insufficient
sanitising of SVG elements.

For the stable distribution (stretch), this problem has been fixed in
version 2.0.3-2+deb9u2.

We recommend that you upgrade your ruby-loofah packages.

For the detailed security status of ruby-loofah please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/ruby-loofah

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/