USN-3812-1: nginx vulnerabilities

7 November 2018

nginx vulnerabilities

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

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

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)

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

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References