CVE-2015-9253

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.

CVSS v3.0

6.5 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0

6.8 MEDIUMAV:N/AC:L/Au:S/C:N/I:N/A:C

EPSS

4.18% chance of exploitation in the next 30 days, 90th percentile

Published

2018-02-19

Updated

2024-08-06

Proof-of-concept exploits (1)

• https://www.futureweb.at/security/CVE-2015-9253/

References

• CVE Record
• NVD entry

Related

• CVE-2015-9251
• CVE-2015-9260
• CVE-2015-9245
• CVE-2015-9261
• CVE-2015-9239
• CVE-2015-9263