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CVE-2015-9253

6.5 · MEDIUM

An issue was discovered in PHP 7.3.x before 7.3.0alpha3, 7.2.x before 7.2.8, and before 7.1.20.

Published Feb 19, 2018CWE-400EPSS 4.18%

Overview

CVE-2015-9253 is a medium-severity vulnerability. It was published on February 19, 2018 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

An issue was discovered in PHP 7.3.x before 7.3.0alpha3, 7.2.x before 7.2.8, and before 7.1.20. The php-fpm master process restarts a child process in an endless loop when using program execution functions (e.g., passthru, exec, shell_exec, or system) with a non-blocking STDIN stream, causing this master process to consume 100% of the CPU, and consume disk space with a large volume of error logs, as demonstrated by an attack by a customer of a shared-hosting facility.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbugs.php.net/bug.php?id=70185Refbugs.php.net/bug.php?id=73342https://github.com/php/php-src/pull/3287Refbugs.php.net/bug.php?id=75968GitHubgithub.com/php/php-src/blob/PHP-7.1.20/NEWS#L20-L22GitHubgithub.com/php/php-src/commit/69dee5c732fe982c82edb17d0dbc3e79a47748d8Refusn.ubuntu.com/3766-1/Refusn.ubuntu.com/4279-1/Refwww.futureweb.at/security/CVE-2015-9253/Refbugs.php.net/bug.php?id=70185Refbugs.php.net/bug.php?id=73342https://github.com/php/php-src/pull/3287

How CyberStrike helps

Frequently asked questions

What is CVE-2015-9253?

CVE-2015-9253 is a medium-severity vulnerability. It was published on February 19, 2018 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

How severe is CVE-2015-9253?

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2015-9253?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2015-9253?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-9253 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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