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Ubuntu Security Notice USN-5006-1

Ubuntu Security Notice USN-5006-1
Posted Jul 7, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5006-1 - 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. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, php
systems | linux, ubuntu
advisories | CVE-2020-7068, CVE-2020-7071, CVE-2021-21702, CVE-2021-21704, CVE-2021-21705
MD5 | d2eaebcf41b9edfd36340798eb2ac873

Ubuntu Security Notice USN-5006-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5006-1
July 07, 2021

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

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
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