Ubuntu 21.10: USN-5212-1 Moderate: Apache2 Denial of Service Risks

ubuntu

January 6, 2022

Several security issues were fixed in Apache HTTP Server.

Summary

Several security issues were fixed in Apache HTTP Server.

Software Description:

- apache2: Apache HTTP server

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)

Topics Covered

security advisory denial of service remote attack ubuntu apache2

Update Instructions

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

Ubuntu 21.10:
  apache2                         2.4.48-3.1ubuntu3.2
  apache2-bin                     2.4.48-3.1ubuntu3.2

Ubuntu 21.04:
  apache2                         2.4.46-4ubuntu1.5
  apache2-bin                     2.4.46-4ubuntu1.5

Ubuntu 20.04 LTS:
  apache2                         2.4.41-4ubuntu3.9
  apache2-bin                     2.4.41-4ubuntu3.9

Ubuntu 18.04 LTS:
  apache2                         2.4.29-1ubuntu4.21
  apache2-bin                     2.4.29-1ubuntu4.21

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