Vulnerability CVE-2015-9253


Published: 2018-02-19

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.

Type:

CWE-400

(Uncontrolled Resource Consumption ('Resource Exhaustion'))

Vendor: PHP
Product: PHP 
Version: 7.2.2;

CVSS2 => (AV:N/AC:L/Au:S/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.8/10
6.9/10
8/10
Exploit range
Attack complexity
Authentication
Remote
Low
Single time
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete

 References:
https://bugs.php.net/bug.php?id=70185
https://bugs.php.net/bug.php?id=73342https://github.com/php/php-src/pull/3287
https://bugs.php.net/bug.php?id=75968
https://github.com/php/php-src/blob/PHP-7.1.20/NEWS#L20-L22
https://github.com/php/php-src/commit/69dee5c732fe982c82edb17d0dbc3e79a47748d8
https://usn.ubuntu.com/3766-1/
https://www.futureweb.at/security/CVE-2015-9253/

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