==========================================================================
Ubuntu Security Notice USN-4089-1
August 07, 2019

ruby-rack vulnerability
==========================================================================

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

– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS

Summary:

Rack could allow cross-site scripting (XSS) attacks.

Software Description:
– ruby-rack: modular Ruby webserver interface

Details:

It was discovered that Rack incorrectly handled carefully crafted requests. A
remote attacker could use this issue to execute a cross-site scripting (XSS)
attack.

Update instructions:

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

Ubuntu 18.04 LTS:
ruby-rack 1.6.4-4ubuntu0.1

Ubuntu 16.04 LTS:
ruby-rack 1.6.4-3ubuntu0.1

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

References:
https://usn.ubuntu.com/4089-1
CVE-2018-16471

Package Information:
https://launchpad.net/ubuntu/+source/ruby-rack/1.6.4-4ubuntu0.1
https://launchpad.net/ubuntu/+source/ruby-rack/1.6.4-3ubuntu0.1
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