USN-3812-1: nginx vulnerabilities

Releases

• Ubuntu 18.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• 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

• 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

• 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

• 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.

References

• CVE-2018-16843
• CVE-2018-16844
• CVE-2018-16845