UBUNTU-CVE-2015-9253

Dashboard / Vulnerabilities / UBUNTU-CVE-2015-9253

UBUNTU-CVE-2015-9253

Summary:

Details: 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.

References: https://ubuntu.com/security/CVE-2015-9253, https://www.futureweb.at/Futureweb-OG-php-fpm-master-process-restarts-child-process-in-a_pid,54177,type,firmeninfo.html, https://ubuntu.com/security/notices/USN-3766-1, https://ubuntu.com/security/notices/USN-4279-1, https://ubuntu.com/security/notices/USN-4279-2, https://ubuntu.com/security/notices/USN-5300-1, https://www.cve.org/CVERecord?id=CVE-2015-9253