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Ubuntu 21.04 USN-5090-3 Moderate: Apache HTTP Server Regression Fix

ubuntu
Calendar Grey September 28, 2021
Dist Ubuntu Esm H88
Resolving the issue arising from USN-5090-1 in the Apache HTTP Server; features critical enhancements.
USN-5090-1 introduced a regression in Apache HTTP Server.

Summary

USN-5090-1 introduced a regression in Apache HTTP Server.

Software Description:

- apache2: Apache HTTP server

Details:

USN-5090-1 fixed vulnerabilities in Apache HTTP Server. One of the upstream

fixes introduced a regression in UDS URIs. This update fixes the problem.

Original advisory details:

James Kettle discovered that the Apache HTTP Server HTTP/2 module

incorrectly handled certain crafted methods. A remote attacker could

possibly use this issue to perform request splitting or cache poisoning

attacks. (CVE-2021-33193)

It was discovered that the Apache HTTP Server incorrectly handled certain

malformed requests. A remote attacker could possibly use this issue to

cause the server to crash, resulting in a denial of service.

(CVE-2021-34798)

Li Zhi Xin discovered that the Apache mod_proxy_uwsgi module incorrectly

handled certain request uri-paths. A remote attacker could possibly use

this issue to cause the server to crash, resulting in a de...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service update apache ubuntu regression fix

Update Instructions

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

Ubuntu 21.04:
  apache2                         2.4.46-4ubuntu1.3
  apache2-bin                     2.4.46-4ubuntu1.3

Ubuntu 20.04 LTS:
  apache2                         2.4.41-4ubuntu3.6
  apache2-bin                     2.4.41-4ubuntu3.6

Ubuntu 18.04 LTS:
  apache2                         2.4.29-1ubuntu4.18
  apache2-bin                     2.4.29-1ubuntu4.18

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

References

https://ubuntu.com/security/notices/USN-5090-3

https://ubuntu.com/security/notices/USN-5090-1

https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1945311

Severity
important
Lowest
Low
Medium
High
Critical

September 28, 2021

Topics%20covered

Topics Covered

security advisory denial of service update apache ubuntu regression fix

Package Information

https://launchpad.net/ubuntu/+source/apache2/2.4.46-4ubuntu1.3
https://launchpad.net/ubuntu/+source/apache2/2.4.41-4ubuntu3.6
https://launchpad.net/ubuntu/+source/apache2/2.4.29-1ubuntu4.18

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