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Ubuntu Security Notice USN-4560-1
September 30, 2020

ruby-gon vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 18.04 LTS

Summary:

Gon gem could be made to run programs if it received specially crafted network
traffic.

Software Description:
– ruby-gon: Ruby library to send data to JavaScript from a Ruby application

Details:

It was discovered that Gon gem did not properly escape certain input. An
attacker could use this vulnerability 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-gon 6.1.0-1+deb9u1build0.18.04.1

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

References:
https://usn.ubuntu.com/4560-1
CVE-2020-25739

Package Information:
https://launchpad.net/ubuntu/+source/ruby-gon/6.1.0-1+deb9u1build0.18.04.1

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