Ubuntu 5090-3: Apache HTTP Server regression | LinuxSecurity.com

Advisories

==========================================================================
Ubuntu Security Notice USN-5090-3
September 28, 2021

apache2 regression
==========================================================================

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

- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

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 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                         2.4.46-4ubuntu1.3
  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://launchpad.net/bugs/1945311

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

Ubuntu 5090-3: Apache HTTP Server regression

September 28, 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: 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 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 2.4.46-4ubuntu1.3 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://launchpad.net/bugs/1945311

Severity
Ubuntu Security Notice USN-5090-3

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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