Ubuntu Security Notice USN-5212-2
January 10, 2022
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 16.04 ESM
– Ubuntu 14.04 ESM
Several security issues were fixed in Apache HTTP Server.
– apache2: Apache HTTP server
USN-5212-1 fixed several vulnerabilities in Apache. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
Original advisory details:
It was discovered that the Apache HTTP Server incorrectly handled certain
forward proxy requests. A remote attacker could use this issue to cause
the server to crash, resulting in a denial of service, or possibly perform
a Server Side Request Forgery attack. (CVE-2021-44224)
It was discovered that the Apache HTTP Server Lua module incorrectly
handled memory in the multipart parser. A remote attacker could use this
issue to cause the server to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2021-44790)
The problem can be corrected by updating your system to the following
Ubuntu 16.04 ESM:
Ubuntu 14.04 ESM:
In general, a standard system update will make all the necessary changes.