Ubuntu 4009-1: Critical PHP Threat Mitigation for Denial of Service

ubuntu

June 5, 2019

Several security issues were fixed in PHP.

Summary

Several security issues were fixed in PHP.

Software Description:

- php7.2: HTML-embedded scripting language interpreter

- php7.0: HTML-embedded scripting language interpreter

Details:

It was discovered that PHP incorrectly handled certain exif tags in images.

A remote attacker could use this issue to cause PHP to crash, resulting in

a denial of service, or possibly obtain sensitive information.

(CVE-2019-11036)

It was discovered that PHP incorrectly decoding certain MIME headers. A

remote attacker could possibly use this issue to cause PHP to crash,

resulting in a denial of service. (CVE-2019-11039)

It was discovered that PHP incorrectly handled certain exif tags in images.

A remote attacker could use this issue to cause PHP to crash, resulting in

a denial of service, or possibly execute arbitrary code. (CVE-2019-11040)

Topics Covered

security advisory denial of service php remote attack update instructions ubuntu

Update Instructions

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

Ubuntu 19.04:
  libapache2-mod-php7.2           7.2.19-0ubuntu0.19.04.1
  php7.2-cgi                      7.2.19-0ubuntu0.19.04.1
  php7.2-cli                      7.2.19-0ubuntu0.19.04.1
  php7.2-fpm                      7.2.19-0ubuntu0.19.04.1

Ubuntu 18.10:
  libapache2-mod-php7.2           7.2.19-0ubuntu0.18.10.1
  php7.2-cgi                      7.2.19-0ubuntu0.18.10.1
  php7.2-cli                      7.2.19-0ubuntu0.18.10.1
  php7.2-fpm                      7.2.19-0ubuntu0.18.10.1

Ubuntu 18.04 LTS:
  libapache2-mod-php7.2           7.2.19-0ubuntu0.18.04.1
  php7.2-cgi                      7.2.19-0ubuntu0.18.04.1
  php7.2-cli                      7.2.19-0ubuntu0.18.04.1
  php7.2-fpm                      7.2.19-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  libapache2-mod-php7.0           7.0.33-0ubuntu0.16.04.5
  php7.0-cgi                      7.0.33-0ubuntu0.16.04.5
  php7.0-cli                      7.0.33-0ubuntu0.16.04.5
  php7.0-fpm                      7.0.33-0ubuntu0.16.04.5

In Ubuntu 18.04 LTS, Ubuntu 18.10, and Ubuntu 19.04, this update uses a new
upstream release, which includes additional bug fixes.

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