GLSA 201910-01: PHP: Arbitrary code execution

http://security.gentoo.org/

Severity:	high
Title:	PHP: Arbitrary code execution
Date:	10/25/2019
Bugs:	#698452
ID:	201910-01

Synopsis

A vulnerability in PHP might allow an attacker to execute arbitrary code.

Background

PHP is an open source general-purpose scripting language that is especially suited for web development.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-lang/php	< 7.1.33	>= 7.1.33	All supported architectures

Description

A underflow in env_path_info in PHP-FPM under certain configurations can be exploited to gain remote code execution.

Impact

A remote attacker, by sending special crafted HTTP requests, could possibly execute arbitrary code with the privileges of the process, or cause a Denial of Service condition.

Workaround

If patching is not feasible, the suggested workaround is to include checks to verify whether or not a file exists before passing to PHP.

Resolution

All PHP 7.1 users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-lang/php-7.1.33"

All PHP 7.2 users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-lang/php-7.2.24"

All PHP 7.3 users should upgrade to the latest version:


      # emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-lang/php-7.3.11"

References

CVE-2019-11043

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201910-01.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.