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Gentoo: GLSA-202110-02 Urgent: Python Remote Command Execution Issue

gentoo
Calendar Grey October 25, 2019
Dist Gentoo Esm H88
Critical advisory detailing a PHP vulnerability in Gentoo Linux that allows arbitrary code execution through remote exploits.
A vulnerability in PHP might allow an attacker to execute arbitrary code.

Summary

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

Topics%20covered

Topics Covered

security advisory Gentoo high severity arbitrary code execution remote execution PHP 201910-01

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
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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.

Severity: High
Title: PHP: Arbitrary code execution
Date: October 25, 2019
Bugs: #698452
ID: 201910-01

Topics%20covered

Topics Covered

security advisory Gentoo high severity arbitrary code execution remote execution PHP 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.

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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

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.

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