– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Gentoo Linux Security Advisory GLSA 201910-01
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
https://security.gentoo.org/
– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –

Severity: High
Title: PHP: Arbitrary code execution
Date: October 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
——————————————————————-
1 dev-lang/php < 7.1.33 >= 7.1.33
< 7.2.24 >= 7.2.24
< 7.3.11 >= 7.3.11

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
==========

[ 1 ] CVE-2019-11043
https://nvd.nist.gov/vuln/detail/CVE-2019-11043

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/201910-01

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.

License
=======

Copyright 2019 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons – Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5

—–BEGIN PGP SIGNATURE—–
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=u5PW
—–END PGP SIGNATURE—–