Ubuntu 4967-1: nginx vulnerability | LinuxSecurity.com

Advisories

==========================================================================
Ubuntu Security Notice USN-4967-1
May 26, 2021

nginx vulnerability
==========================================================================

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

- Ubuntu 21.04
- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

nginx could be made to crash or run programs if it received specially
crafted network traffic.

Software Description:
- nginx: small, powerful, scalable web/proxy server

Details:

Luis Merino, Markus Vervier, and Eric Sesterhenn discovered that nginx
incorrectly handled responses to the DNS resolver. A remote attacker could
use this issue to cause nginx to crash, resulting in a denial of service,
or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 21.04:
  nginx                           1.18.0-6ubuntu8.2
  nginx-common                    1.18.0-6ubuntu8.2
  nginx-core                      1.18.0-6ubuntu8.2
  nginx-extras                    1.18.0-6ubuntu8.2
  nginx-full                      1.18.0-6ubuntu8.2
  nginx-light                     1.18.0-6ubuntu8.2

Ubuntu 20.10:
  nginx                           1.18.0-6ubuntu2.2
  nginx-common                    1.18.0-6ubuntu2.2
  nginx-core                      1.18.0-6ubuntu2.2
  nginx-extras                    1.18.0-6ubuntu2.2
  nginx-full                      1.18.0-6ubuntu2.2
  nginx-light                     1.18.0-6ubuntu2.2

Ubuntu 20.04 LTS:
  nginx                           1.18.0-0ubuntu1.2
  nginx-common                    1.18.0-0ubuntu1.2
  nginx-core                      1.18.0-0ubuntu1.2
  nginx-extras                    1.18.0-0ubuntu1.2
  nginx-full                      1.18.0-0ubuntu1.2
  nginx-light                     1.18.0-0ubuntu1.2

Ubuntu 18.04 LTS:
  nginx                           1.14.0-0ubuntu1.9
  nginx-common                    1.14.0-0ubuntu1.9
  nginx-core                      1.14.0-0ubuntu1.9
  nginx-extras                    1.14.0-0ubuntu1.9
  nginx-full                      1.14.0-0ubuntu1.9
  nginx-light                     1.14.0-0ubuntu1.9

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

References:
  https://ubuntu.com/security/notices/USN-4967-1
  CVE-2021-23017

Package Information:
  https://launchpad.net/ubuntu/+source/nginx/1.18.0-6ubuntu8.2
  https://launchpad.net/ubuntu/+source/nginx/1.18.0-6ubuntu2.2
  https://launchpad.net/ubuntu/+source/nginx/1.18.0-0ubuntu1.2
  https://launchpad.net/ubuntu/+source/nginx/1.14.0-0ubuntu1.9

Ubuntu 4967-1: nginx vulnerability

May 26, 2021

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.04 - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS Summary: nginx could be made to crash or run programs if it received specially crafted network traffic. Software Description: - nginx: small, powerful, scalable web/proxy server Details: Luis Merino, Markus Vervier, and Eric Sesterhenn discovered that nginx incorrectly handled responses to the DNS resolver. A remote attacker could use this issue to cause nginx to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: nginx 1.18.0-6ubuntu8.2 nginx-common 1.18.0-6ubuntu8.2 nginx-core 1.18.0-6ubuntu8.2 nginx-extras 1.18.0-6ubuntu8.2 nginx-full 1.18.0-6ubuntu8.2 nginx-light 1.18.0-6ubuntu8.2 Ubuntu 20.10: nginx 1.18.0-6ubuntu2.2 nginx-common 1.18.0-6ubuntu2.2 nginx-core 1.18.0-6ubuntu2.2 nginx-extras 1.18.0-6ubuntu2.2 nginx-full 1.18.0-6ubuntu2.2 nginx-light 1.18.0-6ubuntu2.2 Ubuntu 20.04 LTS: nginx 1.18.0-0ubuntu1.2 nginx-common 1.18.0-0ubuntu1.2 nginx-core 1.18.0-0ubuntu1.2 nginx-extras 1.18.0-0ubuntu1.2 nginx-full 1.18.0-0ubuntu1.2 nginx-light 1.18.0-0ubuntu1.2 Ubuntu 18.04 LTS: nginx 1.14.0-0ubuntu1.9 nginx-common 1.14.0-0ubuntu1.9 nginx-core 1.14.0-0ubuntu1.9 nginx-extras 1.14.0-0ubuntu1.9 nginx-full 1.14.0-0ubuntu1.9 nginx-light 1.14.0-0ubuntu1.9 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-4967-1

CVE-2021-23017

Severity
Ubuntu Security Notice USN-4967-1

Package Information

https://launchpad.net/ubuntu/+source/nginx/1.18.0-6ubuntu8.2 https://launchpad.net/ubuntu/+source/nginx/1.18.0-6ubuntu2.2 https://launchpad.net/ubuntu/+source/nginx/1.18.0-0ubuntu1.2 https://launchpad.net/ubuntu/+source/nginx/1.14.0-0ubuntu1.9

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