CVE-2019-11043 PoC — Underflow in PHP-FPM can lead to RCE

Source

https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2019/CVE-2019-11043.yaml

Associated Vulnerability

Title: Underflow in PHP-FPM can lead to RCE (CVE-2019-11043)
Description:In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it is possible to cause FPM module to write past allocated buffers into the space reserved for FCGI protocol data, thus opening the possibility of remote code execution.

Description

In PHP-FPM before 7.1.33, 7.2.x before 7.2.24, and 7.3.x before 7.3.11, when deployed in certain Nginx configurations with the fastcgi_split_path_info directive, a crafted request with an empty PATH_INFO can trigger a buffer underflow in the php-fpm code. This may allow an unauthenticated remote attacker to execute arbitrary code through specially crafted URLs by manipulating the PATH_INFO, leading to potential remote code execution. This template checks for the presence of the vulnerable misconfiguration without performing exploitation.

File Snapshot

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