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Ubuntu Security Notice USN-4235-1
January 13, 2020

nginx vulnerability
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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

Summary:

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

Software Description:
– nginx: small, powerful, scalable web/proxy server

Details:

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

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

References:
https://usn.ubuntu.com/4235-1
CVE-2019-20372

Package Information:
https://launchpad.net/ubuntu/+source/nginx/1.16.1-0ubuntu2.1
https://launchpad.net/ubuntu/+source/nginx/1.15.9-0ubuntu1.2
https://launchpad.net/ubuntu/+source/nginx/1.14.0-0ubuntu1.7
https://launchpad.net/ubuntu/+source/nginx/1.10.3-0ubuntu0.16.04.5

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