Ubuntu Security Notice USN-5006-1

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Ubuntu Security Notice USN-5006-1
July 07, 2021

php7.2, php7.4 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.04
- Ubuntu 20.10
- 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:

It was discovered that PHP incorrectly handled certain PHAR files. A remote
attacker could possibly use this issue to cause PHP to crash, resulting in
a denial of service, or possibly obtain sensitive information. This issue
only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2020-7068)

It was discovered that PHP incorrectly handled parsing URLs with passwords.
A remote attacker could possibly use this issue to cause PHP to mis-parse
the URL and produce wrong data. This issue only affected Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS, and Ubuntu 20.10. (CVE-2020-7071)

It was discovered that PHP incorrectly handled certain malformed XML data
when being parsed by the SOAP extension. A remote attacker could possibly
use this issue to cause PHP to crash, resulting in a denial of service.
This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu
20.10. (CVE-2021-21702)

It was discovered that PHP incorrectly handled the pdo_firebase module. A
remote attacker could possibly use this issue to cause PHP to crash,
resulting in a denial of service. (CVE-2021-21704)

It was discovered that PHP incorrectly handled the FILTER_VALIDATE_URL
check. A remote attacker could possibly use this issue to perform a server-
side request forgery attack. (CVE-2021-21705)

Update instructions:

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

Ubuntu 21.04:
  libapache2-mod-php7.4           7.4.16-1ubuntu2.1
  php7.4-cgi                      7.4.16-1ubuntu2.1
  php7.4-cli                      7.4.16-1ubuntu2.1
  php7.4-fpm                      7.4.16-1ubuntu2.1

Ubuntu 20.10:
  libapache2-mod-php7.4           7.4.9-1ubuntu1.2
  php7.4-cgi                      7.4.9-1ubuntu1.2
  php7.4-cli                      7.4.9-1ubuntu1.2
  php7.4-fpm                      7.4.9-1ubuntu1.2

Ubuntu 20.04 LTS:
  libapache2-mod-php7.4           7.4.3-4ubuntu2.5
  php7.4-cgi                      7.4.3-4ubuntu2.5
  php7.4-cli                      7.4.3-4ubuntu2.5
  php7.4-fpm                      7.4.3-4ubuntu2.5

Ubuntu 18.04 LTS:
  libapache2-mod-php7.2           7.2.24-0ubuntu0.18.04.8
  php7.2-cgi                      7.2.24-0ubuntu0.18.04.8
  php7.2-cli                      7.2.24-0ubuntu0.18.04.8
  php7.2-fpm                      7.2.24-0ubuntu0.18.04.8

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

References:
  https://ubuntu.com/security/notices/USN-5006-1
  CVE-2020-7068, CVE-2020-7071, CVE-2021-21702, CVE-2021-21704,
  CVE-2021-21705

Package Information:
  https://launchpad.net/ubuntu/+source/php7.4/7.4.16-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/php7.4/7.4.9-1ubuntu1.2
  https://launchpad.net/ubuntu/+source/php7.4/7.4.3-4ubuntu2.5
  https://launchpad.net/ubuntu/+source/php7.2/7.2.24-0ubuntu0.18.04.8