USN-5371-1 fixed several vulnerabilities in nginx. This update provides the fix for CVE-2021-3618 for Ubuntu 22.04 LTS. Original advisory 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)
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