Ubuntu 18.10 USN-3812-1 Moderate: Nginx DoS Issues Fixed

ubuntu

November 7, 2018

Several security issues were fixed in nginx.

Summary

Several security issues were fixed in nginx.

Software Description:

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

Details:

It was discovered that nginx incorrectly handled the HTTP/2 implementation.

A remote attacker could possibly use this issue to cause excessive memory

consumption, leading to a denial of service. This issue only affected

Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-16843)

Gal Goldshtein discovered that nginx incorrectly handled the HTTP/2

implementation. A remote attacker could possibly use this issue to cause

excessive CPU usage, leading to a denial of service. This issue only

affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 18.10.

(CVE-2018-16844)

It was discovered that nginx incorrectly handled the ngx_http_mp4_module

module. A remote attacker could possibly use this issue with a specially

crafted mp4 file to cause nginx to crash, stop responding, or access

arbitrary memory. (CVE-2018-16845)

Topics Covered

security advisory denial of service software update Ubuntu nginx memory issues HTTP/2

Update Instructions

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

Ubuntu 18.10:
  nginx-common                    1.15.5-0ubuntu2.1
  nginx-core                      1.15.5-0ubuntu2.1
  nginx-extras                    1.15.5-0ubuntu2.1
  nginx-full                      1.15.5-0ubuntu2.1
  nginx-light                     1.15.5-0ubuntu2.1

Ubuntu 18.04 LTS:
  nginx-common                    1.14.0-0ubuntu1.2
  nginx-core                      1.14.0-0ubuntu1.2
  nginx-extras                    1.14.0-0ubuntu1.2
  nginx-full                      1.14.0-0ubuntu1.2
  nginx-light                     1.14.0-0ubuntu1.2

Ubuntu 16.04 LTS:
  nginx-common                    1.10.3-0ubuntu0.16.04.3
  nginx-core                      1.10.3-0ubuntu0.16.04.3
  nginx-extras                    1.10.3-0ubuntu0.16.04.3
  nginx-full                      1.10.3-0ubuntu0.16.04.3
  nginx-light                     1.10.3-0ubuntu0.16.04.3

Ubuntu 14.04 LTS:
  nginx-common                    1.4.6-1ubuntu3.9
  nginx-core                      1.4.6-1ubuntu3.9
  nginx-extras                    1.4.6-1ubuntu3.9
  nginx-full                      1.4.6-1ubuntu3.9
  nginx-light                     1.4.6-1ubuntu3.9

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