[USN-5300-2] PHP vulnerabilities

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-5300-2
March 03, 2022

php7.2, php7.4 vulnerabilities
==========================================================================

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

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in PHP.

Software Description:
- php7.4: HTML-embedded scripting language interpreter
- php7.2: HTML-embedded scripting language interpreter

Details:

USN-5300-1 fixed vulnerabilities in PHP. This update provides the
corresponding updates for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

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.
 (CVE-2015-9253, CVE-2017-8923, CVE-2017-9118, CVE-2017-9120)
  It was discovered that PHP incorrectly handled certain inputs.
 An attacker could possibly use this issue to cause a denial of service,
 or possibly obtain sensitive information. (CVE-2017-9119)
  It was discovered that PHP incorrectly handled certain scripts with XML
 parsing functions.
 An attacker could possibly use this issue to obtain sensitive information.
 (CVE-2021-21707)

Update instructions:

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

Ubuntu 20.04 LTS:
  php7.4-cgi                      7.4.3-4ubuntu2.10
  php7.4-cli                      7.4.3-4ubuntu2.10
  php7.4-fpm                      7.4.3-4ubuntu2.10

Ubuntu 18.04 LTS:
  php7.2-cgi                      7.2.24-0ubuntu0.18.04.11
  php7.2-cli                      7.2.24-0ubuntu0.18.04.11
  php7.2-fpm                      7.2.24-0ubuntu0.18.04.11

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

References:
  https://ubuntu.com/security/notices/USN-5300-2
  https://ubuntu.com/security/notices/USN-5300-1
  CVE-2017-8923, CVE-2017-9118, CVE-2017-9119, CVE-2017-9120,
  CVE-2021-21707

Package Information:
  https://launchpad.net/ubuntu/+source/php7.4/7.4.3-4ubuntu2.10
  https://launchpad.net/ubuntu/+source/php7.2/7.2.24-0ubuntu0.18.04.11
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