USN-4235-1: nginx vulnerability

13 January 2020

nginx vulnerability

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

  • Ubuntu 19.10
  • Ubuntu 19.04
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS


nginx could be made to expose sensitive information over the network.

Software Description

  • nginx - small, powerful, scalable web/proxy server


Bert JW Regeer and Francisco Oca Gonzalez discovered that nginx incorrectly handled certain error_page configurations. A remote attacker could possibly use this issue to perform HTTP request smuggling attacks and access resources contrary to expectations.

Update instructions

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

Ubuntu 19.10
nginx-common - 1.16.1-0ubuntu2.1
nginx-core - 1.16.1-0ubuntu2.1
nginx-extras - 1.16.1-0ubuntu2.1
nginx-full - 1.16.1-0ubuntu2.1
nginx-light - 1.16.1-0ubuntu2.1
Ubuntu 19.04
nginx-common - 1.15.9-0ubuntu1.2
nginx-core - 1.15.9-0ubuntu1.2
nginx-extras - 1.15.9-0ubuntu1.2
nginx-full - 1.15.9-0ubuntu1.2
nginx-light - 1.15.9-0ubuntu1.2
Ubuntu 18.04 LTS
nginx-common - 1.14.0-0ubuntu1.7
nginx-core - 1.14.0-0ubuntu1.7
nginx-extras - 1.14.0-0ubuntu1.7
nginx-full - 1.14.0-0ubuntu1.7
nginx-light - 1.14.0-0ubuntu1.7
Ubuntu 16.04 LTS
nginx-common - 1.10.3-0ubuntu0.16.04.5
nginx-core - 1.10.3-0ubuntu0.16.04.5
nginx-extras - 1.10.3-0ubuntu0.16.04.5
nginx-full - 1.10.3-0ubuntu0.16.04.5
nginx-light - 1.10.3-0ubuntu0.16.04.5

To update your system, please follow these instructions:

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