Debian 9: DLA-2526-1 Critical: ruby-redcarpet XSS Injection Risk

In affected versions, no HTML escaping was being performed when
processing quotes. This applies even when the `:escape_html`
option was being used.

For Debian 9 stretch, this problem has been fixed in version
3.3.4-2+deb9u1.

We recommend that you upgrade your ruby-redcarpet packages.

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

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