[USN-5006-2] PHP vulnerabilities

[Leonidas S. Barbosa]

==========================================================================
Ubuntu Security Notice USN-5006-2
July 13, 2021

php5, php7.0 vulnerabilities
==========================================================================

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

- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in PHP.

Software Description:
- php7.0: HTML-embedded scripting language interpreter
- php5: HTML-embedded scripting language interpreter

Details:

USN-5006-1 fixed several vulnerabilities in PHP. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory 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. (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. (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.
 (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 16.04 ESM:
  libapache2-mod-php7.0           7.0.33-0ubuntu0.16.04.16+esm1
  php7.0-cgi                      7.0.33-0ubuntu0.16.04.16+esm1
  php7.0-cli                      7.0.33-0ubuntu0.16.04.16+esm1
  php7.0-fpm                      7.0.33-0ubuntu0.16.04.16+esm1

Ubuntu 14.04 ESM:
  libapache2-mod-php5             5.5.9+dfsg-1ubuntu4.29+esm14
  php5-cgi                        5.5.9+dfsg-1ubuntu4.29+esm14
  php5-cli                        5.5.9+dfsg-1ubuntu4.29+esm14
  php5-fpm                        5.5.9+dfsg-1ubuntu4.29+esm14

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

References:
  https://ubuntu.com/security/notices/USN-5006-2
  https://ubuntu.com/security/notices/USN-5006-1
  CVE-2020-7068, CVE-2020-7071, CVE-2021-21702, CVE-2021-21704,
  CVE-2021-21705
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