=========================================================================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://ubuntu.com/security/notices/USN-4498-1
  CVE-2019-15587

Package Information:

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