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Ubuntu Security Notice USN-4279-2
February 19, 2020

php7.0 regression
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS

Summary:

USN-4279-1 introduced a regression in PHP.

Software Description:
- php7.0: HTML-embedded scripting language interpreter

Details:

USN-4279-1 fixed vulnerabilities in PHP. The updated packages caused a regression.
This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 It was discovered that PHP incorrectly handled certain scripts.
 An attacker could possibly use this issue to cause a denial of service.
 This issue only affected Ubuntu 12.04 ESM, Ubuntu 14.04 ESM and Ubuntu 16.04 LTS.
 (CVE-2015-9253)
 
 It was discovered that PHP incorrectly handled certain inputs. An attacker
 could possibly use this issue to expose sensitive information.
 (CVE-2020-7059)
 
 It was discovered that PHP incorrectly handled certain inputs.
 An attacker could possibly use this issue to execute arbitrary code.
 This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS
 and Ubuntu 19.10. (CVE-2020-7060)

Update instructions:

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

Ubuntu 16.04 LTS:
  libapache2-mod-php7.0           7.0.33-0ubuntu0.16.04.12
  php7.0-cgi                      7.0.33-0ubuntu0.16.04.12
  php7.0-cli                      7.0.33-0ubuntu0.16.04.12
  php7.0-fpm                      7.0.33-0ubuntu0.16.04.12

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

References:
  https://usn.ubuntu.com/4279-2
  https://usn.ubuntu.com/4279-1
  CVE-2015-9253

Package Information:
  https://launchpad.net/ubuntu/+source/php7.0/7.0.33-0ubuntu0.16.04.12