1. Ubuntu Security Notices
  2. USN-5371-1

USN-5371-1: nginx vulnerabilities

Publication date

12 April 2022

Overview

Several security issues were fixed in nginx.

Releases

Packages

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

Details

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)

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)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
21.10 impish nginx-light –  1.18.0-6ubuntu11.1
nginx-extras –  1.18.0-6ubuntu11.1
nginx-core –  1.18.0-6ubuntu11.1
20.04 focal nginx-light –  1.18.0-0ubuntu1.3
nginx-extras –  1.18.0-0ubuntu1.3
libnginx-mod-http-lua –  1.18.0-0ubuntu1.3
nginx-core –  1.18.0-0ubuntu1.3
nginx-full –  1.18.0-0ubuntu1.3
18.04 bionic nginx-light –  1.14.0-0ubuntu1.10
nginx-extras –  1.14.0-0ubuntu1.10
libnginx-mod-http-lua –  1.14.0-0ubuntu1.10
nginx-core –  1.14.0-0ubuntu1.10
nginx-full –  1.14.0-0ubuntu1.10
16.04 xenial nginx-extras –  1.10.3-0ubuntu0.16.04.5+esm3  
nginx-core –  1.10.3-0ubuntu0.16.04.5+esm3  
nginx-light –  1.10.3-0ubuntu0.16.04.5+esm3  

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›