Ubuntu 5090-1: Apache HTTP Server vulnerabilities

Advisories

==========================================================================
Ubuntu Security Notice USN-5090-1
September 27, 2021

apache2 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Apache HTTP Server.

Software Description:
- apache2: Apache HTTP server

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 denial of service.
This issue only affected Ubuntu 20.04 LTS and Ubuntu 21.04.
(CVE-2021-36160)

It was discovered that the Apache HTTP Server incorrectly handled escaping
quotes. If the server was configured with third-party modules, 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-2021-39275)

It was discovered that the Apache mod_proxy module incorrectly handled
certain request uri-paths. A remote attacker could possibly use this issue
to cause the server to forward requests to arbitrary origin servers.
(CVE-2021-40438)

Update instructions:

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

Ubuntu 21.04:
  apache2                         2.4.46-4ubuntu1.2
  apache2-bin                     2.4.46-4ubuntu1.2

Ubuntu 20.04 LTS:
  apache2                         2.4.41-4ubuntu3.5
  apache2-bin                     2.4.41-4ubuntu3.5

Ubuntu 18.04 LTS:
  apache2                         2.4.29-1ubuntu4.17
  apache2-bin                     2.4.29-1ubuntu4.17

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

References:
  https://ubuntu.com/security/notices/USN-5090-1
  CVE-2021-33193, CVE-2021-34798, CVE-2021-36160, CVE-2021-39275,
  CVE-2021-40438

Package Information:
  https://launchpad.net/ubuntu/+source/apache2/2.4.46-4ubuntu1.2
  https://launchpad.net/ubuntu/+source/apache2/2.4.41-4ubuntu3.5
  https://launchpad.net/ubuntu/+source/apache2/2.4.29-1ubuntu4.17

Ubuntu 5090-1: Apache HTTP Server vulnerabilities

September 27, 2021

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.04 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: Several security issues were fixed in Apache HTTP Server. Software Description: - apache2: Apache HTTP server 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 denial of service. This issue only affected Ubuntu 20.04 LTS and Ubuntu 21.04. (CVE-2021-36160) It was discovered that the Apache HTTP Server incorrectly handled escaping quotes. If the server was configured with third-party modules, 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-2021-39275) It was discovered that the Apache mod_proxy module incorrectly handled certain request uri-paths. A remote attacker could possibly use this issue to cause the server to forward requests to arbitrary origin servers. (CVE-2021-40438)

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: apache2 2.4.46-4ubuntu1.2 apache2-bin 2.4.46-4ubuntu1.2 Ubuntu 20.04 LTS: apache2 2.4.41-4ubuntu3.5 apache2-bin 2.4.41-4ubuntu3.5 Ubuntu 18.04 LTS: apache2 2.4.29-1ubuntu4.17 apache2-bin 2.4.29-1ubuntu4.17 In general, a standard system update will make all the necessary changes.

References

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

CVE-2021-33193, CVE-2021-34798, CVE-2021-36160, CVE-2021-39275,

CVE-2021-40438

Severity
Ubuntu Security Notice USN-5090-1

Package Information

https://launchpad.net/ubuntu/+source/apache2/2.4.46-4ubuntu1.2 https://launchpad.net/ubuntu/+source/apache2/2.4.41-4ubuntu3.5 https://launchpad.net/ubuntu/+source/apache2/2.4.29-1ubuntu4.17

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