Advisory Published

USN-5371-1: nginx vulnerabilities

First published: Tue Apr 12 2022(Updated: )

It was discovered that nginx Lua module mishandled certain inputs. An attacker could possibly use this issue to perform an HTTP Request Smuggling attack. This issue was fixed for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-11724) It was discovered that nginx Lua module mishandled certain inputs. An attacker could possibly use this issue to disclose sensitive information. This issue only affects Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-36309) It was discovered that nginx mishandled the use of compatible certificates among multiple encryption protocols. If a remote attacker were able to intercept the communication, this issue could be used to redirect traffic between subdomains. (CVE-2021-3618)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/nginx-light<1.18.0-6ubuntu11.1
1.18.0-6ubuntu11.1
=21.10
All of
ubuntu/nginx-extras<1.18.0-6ubuntu11.1
1.18.0-6ubuntu11.1
=21.10
All of
ubuntu/nginx-core<1.18.0-6ubuntu11.1
1.18.0-6ubuntu11.1
=21.10
All of
ubuntu/nginx-light<1.18.0-0ubuntu1.3
1.18.0-0ubuntu1.3
=20.04
All of
ubuntu/nginx-extras<1.18.0-0ubuntu1.3
1.18.0-0ubuntu1.3
=20.04
All of
ubuntu/libnginx-mod-http-lua<1.18.0-0ubuntu1.3
1.18.0-0ubuntu1.3
=20.04
All of
ubuntu/nginx-core<1.18.0-0ubuntu1.3
1.18.0-0ubuntu1.3
=20.04
All of
ubuntu/nginx-full<1.18.0-0ubuntu1.3
1.18.0-0ubuntu1.3
=20.04
All of
ubuntu/nginx-light<1.14.0-0ubuntu1.10
1.14.0-0ubuntu1.10
=18.04
All of
ubuntu/nginx-extras<1.14.0-0ubuntu1.10
1.14.0-0ubuntu1.10
=18.04
All of
ubuntu/libnginx-mod-http-lua<1.14.0-0ubuntu1.10
1.14.0-0ubuntu1.10
=18.04
All of
ubuntu/nginx-core<1.14.0-0ubuntu1.10
1.14.0-0ubuntu1.10
=18.04
All of
ubuntu/nginx-full<1.14.0-0ubuntu1.10
1.14.0-0ubuntu1.10
=18.04
All of
ubuntu/nginx-extras<1.10.3-0ubuntu0.16.04.5+esm3
1.10.3-0ubuntu0.16.04.5+esm3
=16.04
All of
ubuntu/nginx-core<1.10.3-0ubuntu0.16.04.5+esm3
1.10.3-0ubuntu0.16.04.5+esm3
=16.04
All of
ubuntu/nginx-light<1.10.3-0ubuntu0.16.04.5+esm3
1.10.3-0ubuntu0.16.04.5+esm3
=16.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for these nginx vulnerabilities?

    The vulnerability ID for these nginx vulnerabilities is CVE-2020-11724.

  • What is an HTTP Request Smuggling attack?

    An HTTP Request Smuggling attack is when an attacker manipulates the HTTP request to bypass security measures and perform unauthorized actions.

  • Which versions of Ubuntu are affected by these vulnerabilities?

    These vulnerabilities affect Ubuntu versions 16.04, 18.04, 20.04, and 21.10.

  • How can I fix these vulnerabilities?

    To fix these vulnerabilities, you need to update the affected nginx packages to the specified versions mentioned in the Ubuntu security advisory.

  • Where can I find more information about these vulnerabilities?

    You can find more information about these vulnerabilities in the Ubuntu security advisories linked in the references section.

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