ESB-2018.3490 - [UNIX/Linux][Ubuntu] nginx-common: Multiple vulnerabilities 2018-11-08

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3490
                  nginx vulnerabilities patched in Ubuntu
                              8 November 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           nginx-common
Publisher:         Ubuntu
Operating System:  Ubuntu
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
                   Denial of Service        -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-16845 CVE-2018-16844 CVE-2018-16843

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3812-1

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running nginx-common check for an updated version of the software 
         for their operating system.

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==========================================================================
Ubuntu Security Notice USN-3812-1
November 07, 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

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

References:
  https://usn.ubuntu.com/usn/usn-3812-1
  CVE-2018-16843, CVE-2018-16844, CVE-2018-16845

Package Information:
  https://launchpad.net/ubuntu/+source/nginx/1.15.5-0ubuntu2.1
  https://launchpad.net/ubuntu/+source/nginx/1.14.0-0ubuntu1.2
  https://launchpad.net/ubuntu/+source/nginx/1.10.3-0ubuntu0.16.04.3
  https://launchpad.net/ubuntu/+source/nginx/1.4.6-1ubuntu3.9

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