Exploitation Summary
EIP tracks 1 public exploit for CVE-2021-21707. PoCs published by useru1k.
AI-analyzed exploit summary This repository contains a Java-based exploit for CVE-2021-21707, targeting PHP 8.1.0-dev. The exploit leverages a User-Agent header injection to execute a reverse shell payload via the 'zerodiumsystem' function, demonstrating remote code execution (RCE).
Description
In PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus interpreting the filename differently from what the user intended, which may lead it to reading a different file than intended.
Exploits (1)
This repository contains a Java-based exploit for CVE-2021-21707, targeting PHP 8.1.0-dev. The exploit leverages a User-Agent header injection to execute a reverse shell payload via the 'zerodiumsystem' function, demonstrating remote code execution (RCE).
References (5)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N