CVE-2015-9253
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…
Does this matter?
Lower severity and a low EPSS score (4.18%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.0
- 6.5 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 4.18% probability · 90th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- php/php
- Source
- cve@mitre.org
References
- https://bugs.php.net/bug.php?id=70185Exploit, Issue Tracking, Vendor Advisory
- https://bugs.php.net/bug.php?id=73342https://github.com/php/php-src/pull/3287Exploit, Issue Tracking, Vendor Advisory
- https://bugs.php.net/bug.php?id=75968Exploit, Issue Tracking, Vendor Advisory
- https://github.com/php/php-src/blob/PHP-7.1.20/NEWS#L20-L22Third Party Advisory
- https://github.com/php/php-src/commit/69dee5c732fe982c82edb17d0dbc3e79a47748d8Patch, Third Party Advisory
- https://usn.ubuntu.com/3766-1/Third Party Advisory
- https://usn.ubuntu.com/4279-1/
- https://www.futureweb.at/security/CVE-2015-9253/Exploit, Third Party Advisory
- https://bugs.php.net/bug.php?id=70185Exploit, Issue Tracking, Vendor Advisory
- https://bugs.php.net/bug.php?id=73342https://github.com/php/php-src/pull/3287Exploit, Issue Tracking, Vendor Advisory
- https://bugs.php.net/bug.php?id=75968Exploit, Issue Tracking, Vendor Advisory
- https://github.com/php/php-src/blob/PHP-7.1.20/NEWS#L20-L22Third Party Advisory
- https://github.com/php/php-src/commit/69dee5c732fe982c82edb17d0dbc3e79a47748d8Patch, Third Party Advisory
- https://usn.ubuntu.com/3766-1/Third Party Advisory
- https://usn.ubuntu.com/4279-1/
- https://www.futureweb.at/security/CVE-2015-9253/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.