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  3. SSRF Internal Network Scanning & Credential Exfiltration
MediumVDP30 min

SSRF Internal Network Scanning & Credential Exfiltration

By @gorka

Plataforma de archivos con Page Export que permite escanear la red interna, descubrir un servicio admin oculto, robar credenciales y acceder al panel de administracion.

593 views35 completedUpdated Sep 2026
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Hackers who solved it· 8

CR1
@crash22 days ago
zynap2
@zynapAug 2026
VA3
@vazquezdv182005Aug 2026
itrox
@itroxJul 2026
r4mattra
@r4mattraJul 2026
benjaminnocervigni
@benjaminnocervigniJul 2026
SU
@suraxddqJun 2026
ZN
@znbzJun 2026

Objectives

1
Usar Page Export para escanear puertos internos
2
Descubrir servicio en puerto 9999
3
Exfiltrar credenciales del admin via SSRF
4
Acceder al admin panel con las credenciales robadas

Information

Difficulty
Medium
Duration
30 min
Bounty
VDP
Completed
35
Creator
gorka@gorka
Updated
Sep 2026

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Tools

Burp IntruderNavegador

Prerequisites

  • SSRF basico
  • Port scanning conceptual
  • Servicios internos

Tags

SSRF

Achievement you'll earn

Solve this lab to unlock this shareable achievement

BBLABS.ESLab Solved
MediumVDP
// achievement_unlocked

SSRF Internal Network Scanning & Credential Exfiltration

SSRF
Sep 2026
gorka
solved_by@gorkaMember since Mar 2026
bblabs.es// real hacking practice

Community writeups

Despliegue

# Opcion 1: autodeploy
./autodeploy.sh

# Opcion 2: manual
docker compose up --build

# Acceder
http://localhost:1200

Compatible con macOS, Linux y Windows (Docker Desktop / WSL).

Para parar:

./autodeploy.sh destroy
# o: docker compose down -v

Contenido del Lab

La aplicacion

FileForge con Page Export (fetch server-side) y servicio de administracion oculto en localhost:9999.

La vulnerabilidad

Page Export hace fetch de cualquier URL desde el servidor. Permite escanear la red interna probando diferentes puertos. El servicio admin en puerto 9999 tiene endpoint /admin/adminUsers que devuelve credenciales.

Cadena de ataque

1. Page Export con http://127.0.0.1:1-65535 (scan)
2. Encontrar puerto 9999 abierto
3. Fetch http://127.0.0.1:9999/admin/adminUsers
4. Obtener credenciales: admin / SuperSecr3t!2024
5. Login en /admin → Panel completo + Flag

Solucion interactiva

Accede a /writeup dentro de la aplicacion para una guia paso a paso con botones interactivos.

Flag

d8578edf8458ce06fbc5bb76a58c5ca4

Remediacion

  1. Whitelist de URLs/dominios para export
  2. Bloquear acceso a localhost y rangos privados
  3. No exponer credenciales en endpoints internos
  4. Network segmentation

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