[USN-5371-1] nginx vulnerabilities


========================================================================== Ubuntu Security Notice USN-5371-1 April 13, 2022
nginx vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS – Ubuntu 16.04 ESM
Summary:
Several security issues were fixed in nginx.
Software Description: – 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 only affects 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:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10: nginx-core 1.18.0-6ubuntu11.1 nginx-extras 1.18.0-6ubuntu11.1 nginx-light 1.18.0-6ubuntu11.1
Ubuntu 20.04 LTS: libnginx-mod-http-lua 1.18.0-0ubuntu1.3 nginx-core 1.18.0-0ubuntu1.3 nginx-extras 1.18.0-0ubuntu1.3 nginx-full 1.18.0-0ubuntu1.3 nginx-light 1.18.0-0ubuntu1.3
Ubuntu 18.04 LTS: libnginx-mod-http-lua 1.14.0-0ubuntu1.10 nginx-core 1.14.0-0ubuntu1.10 nginx-extras 1.14.0-0ubuntu1.10 nginx-full 1.14.0-0ubuntu1.10 nginx-light 1.14.0-0ubuntu1.10
Ubuntu 16.04 ESM: nginx-core 1.10.3-0ubuntu0.16.04.5+esm3 nginx-extras 1.10.3-0ubuntu0.16.04.5+esm3 nginx-light 1.10.3-0ubuntu0.16.04.5+esm3
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5371-1 CVE-2020-11724, CVE-2020-36309, CVE-2021-3618
Package Information: launchpad.net/ubuntu/+source/nginx/1.18.0-6ubuntu11.1 launchpad.net/ubuntu/+source/nginx/1.18.0-0ubuntu1.3 launchpad.net/ubuntu/+source/nginx/1.14.0-0ubuntu1.10