Add PoC exploit for CVE-2021-41773

[postmodern]

Add a PoC exploit for CVE-2021-41773, Path Traversal in Apache 2.4.49 can be used to read arbitrary files or execute commands.

Reference PoCs

• https://github.com/lorddemon/CVE-2021-41773-PoC/blob/main/CVE-2021-41773.py
• https://github.com/TishcaTpx/POC-CVE-2021-41773/blob/main/poc.py
• https://github.com/iilegacyyii/PoC-CVE-2021-41773/blob/main/CVE-2021-41773.py
• https://github.com/mohwahyudi/cve-2021-41773/blob/main/apache.py
• https://github.com/blasty/CVE-2021-41773
• https://github.com/Ls4ss/CVE-2021-41773_CVE-2021-42013/blob/main/PoC.sh (curl command)
• https://github.com/ranggaggngntt/CVE-2021-41773/blob/master/apache2-4-49.py#L19-L50
• https://github.com/creadpag/CVE-2021-41773-POC (NSE script)
• https://github.com/justakazh/mass_cve-2021-41773
• https://github.com/blackn0te/Apache-HTTP-Server-2.4.49-2.4.50-Path-Traversal-Remote-Code-Execution/blob/main/exploit.py
• https://github.com/TheKernelPanic/exploit-apache2-cve-2021-41773/blob/master/exploit.rb (Ruby exploit!)
• https://github.com/retrymp3/apache2.4.49VulnerableLabSetup (contains both RCE and Path Traversal exploits)
• https://github.com/0xGabe/Apache-CVEs

Vuln App

• https://github.com/jheeree/Simple-CVE-2021-41773-checker/tree/main/poc (docker-compose configuration)
• https://github.com/blasty/CVE-2021-41773 (contains Dockerfile and docker-compose.yml)
• https://github.com/itsecurityco/CVE-2021-41773 (contains Dockerfile and docker-compose.yml)
• https://github.com/12345qwert123456/CVE-2021-41773/blob/main/2.4.49/Dockerfile

How to Submit a PoC

See the CONTRIBUTING file for instructions on how to submit a PoC exploit.