Denial of service in PHP

Published: 2018-02-16
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2015-9253
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Universal components / Libraries / Scripting languages

Vendor PHP Group

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Resource exhaustion

EUVDB-ID: #VU10880

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 - Resource exhaustion

Exploit availability: No


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.


Update to version 7.2.3.

Vulnerable software versions

PHP: 5.4.0 - 7.2.2

External links

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.