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Ubuntu Security Notice USN-4022-1
June 19, 2019

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

- Ubuntu 16.04 LTS

Summary:

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

Software Description:
- gunicorn: Python HTTP/WSGI server

Details:

It was discovered that gunicorn improperly handled certain input. An attacker
could potentially use this issue execute a cross-site scripting (XSS) attack.

Update instructions:

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

Ubuntu 16.04 LTS:
  gunicorn                        19.4.5-1ubuntu1.1
  gunicorn3                       19.4.5-1ubuntu1.1
  python-gunicorn                 19.4.5-1ubuntu1.1
  python3-gunicorn                19.4.5-1ubuntu1.1

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

References:
  https://usn.ubuntu.com/4022-1
  CVE-2018-1000164

Package Information:
  https://launchpad.net/ubuntu/+source/gunicorn/19.4.5-1ubuntu1.1