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Ubuntu Security Notice USN-5006-2

Ubuntu Security Notice USN-5006-2
Posted Jul 14, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5006-2 - USN-5006-1 fixed several vulnerabilities in PHP. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, php, vulnerability
systems | linux, ubuntu
advisories | CVE-2020-7068, CVE-2020-7071, CVE-2021-21702, CVE-2021-21704, CVE-2021-21705
SHA-256 | eedca1a470ded97b0623427c6e5fdcf4bb966c9f811fd215e5d150d46f82e283

Ubuntu Security Notice USN-5006-2

Change Mirror Download
==========================================================================
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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