Vulnerability identifier: #VU10880

Vulnerability risk: Low

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2015-9253

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PHP
Universal components / Libraries / Scripting languages

Vendor: PHP Group

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the php-fpm master process due to improper processing of crafted PHP scripts. A remote attacker can send a specially crafted PHP script, trigger the php-fpm master process to restart a child process and cause the php-fpm master process the php-fpm master process to consume all available CPU resources and excessive amounts of disk space that results in denial of service.

Mitigation
Update to version 7.2.3.

Vulnerable software versions

PHP: 5.4.0 - 5.4.43, 7.0.0 - 7.0.28, 7.1.0 - 7.1.15, 7.2.0 - 7.2.2

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External links
http://bugs.php.net/bug.php?id=70185
http://bugs.php.net/bug.php?id=73342
http://bugs.php.net/bug.php?id=75968

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.